Chaspierre, G., Denis, G., Panciatici, P., & Van Cutsem, T. (in press). Dynamic equivalent of an active distribution network taking into account model uncertainties.

*Proc. IEEE PES PowerTech conference*.Peer reviewed

A reduced-order model of a distribution network hosting inverter-based generators is derived. This model aims to be used in dynamic simulations of large disturbances in the transmission system. Uncertainties ...

Chaspierre, G., Denis, G., Panciatici, P., & Van Cutsem, T. (in press). Identification of a Dynamic Equivalent of an Active Distribution Network from Monte-Carlo Simulations.

*Proc. 8th Solar Integration Workshop*. Sweden.Peer reviewed

This paper deals with the derivation of a dynamic
equivalent of a distribution system for use in (phasor-mode)
dynamic simulations of large disturbances in the transmission
system. The original, unreduced ...

Chaspierre, G., Panciatici, P., & Van Cutsem, T. (in press). Dynamic Equivalent of a Distribution Grid Hosting Dispersed Photovoltaic Units.

*IREP’2017 Symposium: X Bulk Power Systems Dynamics and Control Symposium*.Peer reviewed

This paper deals with the derivation of a simplified model of a distribution network hosting dispersed photovoltaic units. The model is aimed at short-term dynamic simulations
of a transmission grid in ...

Papangelis, L., Glavic, M., & Van Cutsem, T. (in press). A framework for dynamic security assessment of combined multi-terminal HVDC and AC grids.

*Proc. IEEE PES PowerTech conference*.Peer reviewed

This paper discusses some challenges that dynamic security assessment and control will face due to the integration of multi-terminal high-voltage direct-current grids and the resulting interconnection of ...

Lammert, G., Premm, D., Pabon Ospina, L. D., Boemer, J., Braun, M., & Van Cutsem, T. (2019). Control of Photovoltaic Systems for Enhanced Short-Term Voltage Stability and Recovery.

*IEEE Transactions on Energy Conversion, 34*, 243-254.Peer reviewed (verified by ORBi)

This paper investigates the impact of: i) the Low Voltage Ride-Through (LVRT) and Dynamic Voltage Support (DVS) capability; ii) the active current recovery rate; iii) the local voltage control; and iv) the ...

Belhaouane, M.-M., Almaksour, K., Papangelis, L., Colas, F., Prevost, T., Guillaud, X., & Van Cutsem, T. (2019). Experimental Validation of a Model Predictive Control Strategy on a Three-terminal VSC-HVDC Mock-up.

*Proceedings of the 15th IET International Conference on AC and DC Power Transmission (ACDC 2019)*.Peer reviewed

The subject of this paper is the experimental validation of a recently proposed advanced control scheme for Voltage Source Converters (VSC) based on Model Predictive Control (MPC). The main purpose of the ...

Papangelis, L. (2018).

*Local and centralized control of multi-terminal DC grids for secure operation of combined AC/DC systems*. Unpublished doctoral thesis, Université de Liège, Liège, Belgique.High Voltage Direct Current (HVDC) transmission has become increasingly popular in the recent years, fueled by the shift to renewable energy sources and the gradual decommissioning of conventional power plants ...

Soleimani Bidgoli, H., Glavic, M., & Van Cutsem, T. (2018). Real-time corrective control of active distribution networks: validation in future scenarios of a real system.

*CIGRE Science and Engineering, 12*, 81-99.Peer reviewed (verified by ORBi)

Distribution grids are hosting more and more dispersed generation units exploiting renewable energy sources. Their proliferation, and the intermittent nature of their production creates new operation problems ...

Papangelis, L., Debry, M.-S., Prevost, T., Panciatici, P., & Van Cutsem, T. (2018). Decentralized Model Predictive Control of Voltage Source Converters for AC Frequency Containment.

*International Journal of Electrical Power and Energy Systems, 98*, 342-349.Peer reviewed (verified by ORBi)

This paper presents a novel control scheme for exchange of frequency support between asynchronous AC systems through a High Voltage Direct Current link or grid. The proposed controller bears the spirit of an ...

Papangelis, L., Debry, M.-S., Prevost, T., Panciatici, P., & Van Cutsem, T. (2018). Stability of a Voltage Source Converter subject to Decrease of Short-Circuit Capacity: a Case Study.

*Proceedings of the 20th PSCC*.Peer reviewed

The subject of this paper is the investigation of the stability of a Voltage Source Converter (VSC) undergoing a sudden decrease of the Short Circuit Capacity of the AC system to which it is connected. A case ...

Chaspierre, G., & Van Cutsem, T. (2018). Identification of a Reduced-Order Model of an Active Distribution Grid Using Recursive Training. In G., Chaspierre & T., Van Cutsem,

*Proc. of the IEEE Benelux Young Researchers Symposium*.Peer reviewed

THIS PAPER WAS PRESENTED BY GILLES CHASPIERRE AT A LOCAL SYMPOSIUM WHERE PHD STUDENTS HAVE THE OPPORTUNITY TO PRESENT THEIR RESEARCH WORK. AN UPDATED AND MORE COMPREHENSIVE VERSION HAS BEEN SUBMITTED FOR ...

Robitzky, L., Weckesser, T., Häger, U., Rehtanz, C., & Van Cutsem, T. (2018). Agent-based Identification and Control of Voltage Emergency Situations.

*IET Generation, Transmission and Distribution, 12*(6), 1446–1454.Peer reviewed (verified by ORBi)

Changing dynamics of power systems caused by the migration from conventional to distributed energy sources increase the risk of blackouts due to voltage instability, especially in case of unforeseen network ...

Soleimani Bidgoli, H., & Van Cutsem, T. (2018). Combined Local and Centralized Voltage Control in Active Distribution Networks.

*IEEE Transactions on Power Systems, 33*(2), 1374-1384.Peer reviewed (verified by ORBi)

A two-level real-time voltage control scheme is proposed to keep voltages within specified limits in distribution grids using Distributed Generation Units (DGUs). It combines a local and a centralized control ...

Yamashita, K., Renner, H., Martınez Villanueva, S., Lammert, G., Aristidou, P., Carvalho Martins, J., Zhu, L., Pabon Ospina, L. D., & Van Cutsem, T. (2018). Industrial Recommendation of Modeling of Inverter Based Generators for Power System Dynamic Studies with Focus on Photovoltaic.

*IEEE Power and Energy Technology Systems Journal, 5*(1), 1-10.Peer reviewed

Dynamic simulations have played an important role in assessing the power system dynamic studies. The appropriate numerical model is the key to obtain correct dynamic simulation results. In addition, the ...

Alcaide-Moreno, B., Fuerte-Esquivel, C., Glavic, M., & Van Cutsem, T. (2018). Electric Power Network State Tracking from Multirate Measurements.

*IEEE Transactions on Instrumentation and Measurement, 67*, 33-44.Peer reviewed (verified by ORBi)

This paper proposes a novel tracking state estimator to process both fast-rate synchronized phasor and slow rate SCADA measurements. The former are assumed to be in limited number. The latter are exploited as ...

Chaspierre, G., Panciatici, P., & Van Cutsem, T. (2018). Aggregated Dynamic Equivalent of a Distribution System hosting Inverter-based Generators.

*Proceedings of the 20th Power Systems Computation Conference*.Peer reviewed

An equivalent, i.e. a reduced-order model, of active distribution networks is derived, for use in (phasor-mode) dynamic simulations of large-disturbances. In the unreduced model, the network hosts a large ...

Chaspierre, G., Panciatici, P., & Van Cutsem, T. (2018). Modelling Active Distribution Networks under Uncertainty: Extracting Parameter Sets from Randomized Dynamic Responses.

*Proceedings of the 20th Power Systems Computation Conference*.Peer reviewed

This paper deals with the dynamic modelling of distribution systems hosting a large amount of Inverter-Based Generators (IBGs), more precisely their response to large disturbances in the transmission system ...

Weckesser, J., & Van Cutsem, T. (2018). Searching for Plausible N-k Contingencies Endangering Voltage Stability.

*IEEE International Conference on Innovative Smart Grid Technologies IEEE ISGT Europe 2017, Turin 26-29 September 2017*.Peer reviewed

This paper presents a novel search algorithm using time-domain simulations to identify plausible N-k contingencies endangering voltage stability. Starting from an initial list of disturbances, progressively ...

Weckesser, T., & Van Cutsem, T. (2018). Identifying Plausible Harmful N-k Contingencies: A Practical Approach based on Dynamic Simulations.

*Proceedings of the 20th Power Systems Computation Conference*.Peer reviewed

This paper presents a practical search algorithm using detailed dynamic simulations to identify plausible harmful N k contingency sequences. Starting from an initial list of contingencies, progressively ...

Soleimani Bidgoli, H. (2017).

*Real-time Corrective Control in Active Distribution Networks*. Unpublished doctoral thesis, Université de Liège, Liège, Belgique.The continuous growth of renewable energy injected into Medium-Voltage (MV) distribution systems is expected to create new operational problem such as over- and under-voltages and/or thermal overloads of ...

Papangelis, L., Debry, M.-S., Panciatici, P., & Van Cutsem, T. (2017). Coordinated Supervisory Control of Multi-Terminal HVDC Grids: a Model Predictive Control Approach.

*IEEE Transactions on Power Systems, 32*(6), 4673-4683.Peer reviewed (verified by ORBi)

A coordinated supervisory control scheme for future multi-terminal High-Voltage Direct-Current (HVDC) grids is proposed. The purpose is to supervise the grid and take appropriate actions to ensure power ...

Papangelis, L., Panciatici, P., Debry, M.-S., & Van Cutsem, T. (2017, July). A Receding Horizon Approach to Incorporate Frequency Support into the AC/DC Converters of a Multi-Terminal DC Grid.

*Electric Power Systems Research*.Peer reviewed (verified by ORBi)

This paper proposes a novel control scheme for provision of frequency support among asynchronous AC areas through HVDC grids. It is based on local controllers, each acting on a voltage source converter, using ...

Papangelis, L., Debry, M.-S., Panciatici, P., & Van Cutsem, T. (2017). Local Control of AC/DC Converters for Frequency Support Between Asynchronous AC Areas.

*IEEE PES 2017 PowerTech conference proceedings*.Peer reviewed

This paper proposes a novel control scheme for frequency support among asynchronous AC areas through HVDC grids. It is based on local controllers, each acting on a voltage source converter, using locally ...

Soleimani Bidgoli, H., & Van Cutsem, T. (2017). Voltage Profile Correction in Distribution Grids Combining Single- and Two-level Controllers.

*IEEE PES 2017 PowerTech conference proceedings*.Peer reviewed

A real-time control scheme is proposed to correct undesired voltages in distribution networks by adjusting the reactive powers produced by Dispersed Generation Units (DGUs). This is performed at two levels ...

Vangulick, D., Ernst, D., & Van Cutsem, T. (2017). Resilience of the DSO network near to 50.2Hz.

*Proceedings of the 24th International Conference on Electricity Distribution*.Peer reviewed

In an electrical system where decentralized and embedded productions are becoming more and more important, it is essential to ensure there is a good understanding of their behaviour at their operating limits ...

Weckesser, J., Franz, V., Grebe, E., & Van Cutsem, T. (2017). A Model Reduction Approach for Simulation of Long-term Voltage and Frequency Dynamics.

*12th IEEE PES PowerTech Conference 2017*.Peer reviewed

This paper presents a novel approach, which identifies a buffer zone around a given study system and replaces the external system with an equivalent. The aim is to obtain a reduced system, which is suitable ...

Weckesser, J., Papangelis, L., Vournas, C., & Van Cutsem, T. (2017, March). Local Identification of Voltage Instability from Load Tap Changer Response.

*Sustainable Energy, Grids and Networks*.Peer reviewed (verified by ORBi)

This paper presents a local long-term voltage instability monitoring method, which is suitable for on-line applications. The proposed extended-time Local Identification of Voltage Emergency Situations (eLIVES ...

Hatziargyriou, N., Van Cutsem, T., Milanović, J., Pourbeik, P., Vournas, C., Vlachokyriakou, O., Kotsampopoulos, P., Hong, Ramos, R., Boemer, J., Aristidou, P., Singhvi, V., dos Santos, J., & Colombari, L. (2017).

*Contribution to Bulk System Control and Stability by Distributed Energy Resources connected at Distribution Network*(PES-TR22). IEEE.The penetration of Distributed Energy Resources (DER) within the Distribution Network (DN) increases worldwide. This increase of local generation has led to various changes in the philosophy of DN operation ...

Aristidou, P., Valverde, G., & Van Cutsem, T. (2017). Contribution of distribution network control to voltage stability: A case study.

*IEEE Transactions on Smart Grid*.Peer reviewed (verified by ORBi)

A case study dealing with long-term voltage instability in systems hosting active distribution networks is reported in this paper. It anticipates future situations with high penetration of dispersed generation ...

Weckesser, J., & Van Cutsem, T. (2017). Equivalent to Represent Inertial and Primary Frequency Control Effects of an External System.

*IET Generation, Transmission and Distribution*.Peer reviewed (verified by ORBi)

This paper presents a novel equivalent, which is suitable for simulation of inertial and primary frequency control effects. In the model reduction procedure, dynamic power injectors are used to replace the ...

Plumier, F., Aristidou, P., Geuzaine, C., & Van Cutsem, T. (2016). Co-simulation of Electromagnetic Transients and Phasor Models: a Relaxation Approach.

*IEEE Transactions on Power Delivery, 31*(5).Peer reviewed (verified by ORBi)

Co-simulation opens new opportunities to combine mature ElectroMagnetic Transients (EMT) and Phasor-Mode (PM) solvers, and take advantage of their respective high accuracy and execution speed. In this paper, a ...

Soleimani Bidgoli, H., Glavic, M., & Van Cutsem, T. (2016). Receding-Horizon Control of Distributed Generation to Correct Voltage or Thermal Violations and Track Desired Schedules.

*Proceedings of the 19th PSCC*(pp. 8).Peer reviewed

This paper presents a real-time, centralized control system acting on the active and reactive powers of distributed generators when the network experiences voltage and/or thermal limits violation. The control ...

Freytes, J., Papangelis, L., Saad, H., Rault, P., Van Cutsem, T., & Guillaud, X. (2016). On the modeling of MMC for use in large scale dynamic simulations.

*Proceedings of the 19th PSCC*(pp. 7).Peer reviewed

This paper focuses on simplified models of the
Modular Multilevel Converter suitable for large-scale dynamic
studies, in particular simulations under the phasor approximation.
Compared to the existing ...

Perez, A., Johannsson, H., Ostergaard, J., Glavic, M., & Van Cutsem, T. (2016). Improved Thévenin equivalent methods for real-time voltage stability assessment.

*proc. IEEE ENERGYCON Conference*. IEEE.Peer reviewed

An improved Thévenin equivalent method for real-time voltage stability assessment that uses wide-area information from synchrophasors is proposed. The improvements are a better modeling of the limited ...

Olivier, F., Aristidou, P., Ernst, D., & Van Cutsem, T. (2016). Active Management of Low-Voltage Networks for Mitigating Overvoltages due to Photovoltaic Units.

*IEEE Transactions on Smart Grid, 2*(7), 926-936.Peer reviewed (verified by ORBi)

In this paper, the overvoltage problems that might arise from the integration of photovoltaic panels into low-voltage distribution networks is addressed. A distributed scheme is proposed that adjusts the ...

Aristidou, P., Lebeau, S., Loud, L., & Van Cutsem, T. (2016). Prospects of a new dynamic simulation software for real-time applications on the Hydro-Québec system.

*CIGRE Science and Engineering, 4*, 88-95.Peer reviewed

Hydro-Québec has a long interest in on-line Dynamic Security Assessment (DSA) driven by its challenging system dynamics. Presently, off-line calculated security limits are combined with an on-line monitoring ...

Plumier, F. (2016).

*Co-simulation of Electromagnetic Transients and Phasor Models of Electric Power Systems*. Unpublished doctoral thesis, Université de Liège, Liège, Belgique.This study investigates and improves methods used for the combination of phasor and electromagnetic transients time domain simulations of power systems. It involves the study of the protocols of computation ...

Aristidou, P., Lebeau, S., & Van Cutsem, T. (2016). Power System Dynamic Simulations using a Parallel Two-level Schur-complement Decomposition.

*IEEE Transactions on Power Systems, 31*, 3984 - 3995.Peer reviewed (verified by ORBi)

As the need for faster power system dynamic simulations increases, it is essential to develop new algorithms that exploit parallel computing to accelerate those simulations. This paper proposes a parallel ...

Soleimani Bidgoli, H., Glavic, M., & Van Cutsem, T. (2015, November 23).

*Model Predictive Control for Reference Tracking in Distribution Networks Hosting Dispersed Generation*. Paper presented at IAP DYSCO Study Day: Dynamical systems, control and optimization, Leuven, Belgium.A real-time, centralized control system is presented which is acting on the active and reactive powers of distributed generators when the network experiences voltage and/or
thermal limits violation. The ...

Aristidou, P., & Van Cutsem, T. (2015). A Parallel Processing Approach to Dynamic Simulations of Combined Transmission and Distribution Systems.

*International Journal of Electrical Power and Energy Systems, 72*, 58-65.Peer reviewed (verified by ORBi)

Simulating a power system with both transmission and distribution networks modeled in detail is a huge computational challenge. In this paper, a Schur-complement-based domain decomposition algorithm is ...

Weckesser, T., Johannsson, H., Ostergaard, J., & Van Cutsem, T. (2015). Derivation and Application of Sensitivities to Assess Transient Voltage Sags caused by Rotor Swings.

*International Journal of Electrical Power and Energy Systems, 72*, 75-82.Peer reviewed (verified by ORBi)

The paper introduces an approach to investigate voltage sags, which are caused by large generator rotor swings following a transient disturbance. Therefore, the method exploits sensitivities derived from the ...

Aristidou, P., Lebeau, S., Loud, L., & Van Cutsem, T. (2015). Prospects of a new dynamic simulation software for real-time applications on the Hydro-Québec system.

*2015 CIGRÉ Canada Conference proceedings*.Peer reviewed

Hydro-Québec has a long interest in on-line Dynamic Security Assessment (DSA) driven by its challenging power network dynamics (angle, frequency and voltage stability, short and long-term dynamics). At the ...

Van Cutsem, T., Glavic, M., Rosehart, W., Andrade dos Santos, J., Cañizares, C., Kanatas, M., Lima, L., Milano, F., Papangelis, L., Andrade Ramos, R., Tamimi, B., Taranto, G., & Vournas, C. (2015).

*Test systems for voltage stability analysis and security assessment*(PES-TR19). IEEE.This report documents the work of the IEEE PES Task Force on Test Systems for Voltage Stability Analysis and Security Assessment. The report starts with a short introduction about the motivation and the scope ...

Alcaide-Moreno, B., Fuerte-Esquivel, C., Glavic, M., & Van Cutsem, T. (2015). Hybrid processing of SCADA and synchronized phasor measurements for tracking network state.

*Proc. IEEE PES General Meeting*.Peer reviewed

This paper proposes a new tracking state estimator aimed at following some of the dynamics of the network state (bus voltage phasors) by a hybrid processing of SCADA and synchronized phasor measurements. The ...

Aristidou, P. (2015).

*Time-domain simulation of large electric power systems using domain-decomposition and parallel processing methods*. Unpublished doctoral thesis, Université de Liège, Liège, Belgique.Dynamic simulation studies are used to analyze the behavior of power systems after a disturbance has occurred. Over the last decades, they have become indispensable to anyone involved in power system planning ...

Aristidou, P., Papangelis, L., Guillaud, X., & Van Cutsem, T. (2015). Modular modelling of combined AC and DC systems in dynamic simulations.

*Proc. of IEEE PES 2015 PowerTech conference*.Peer reviewed

A formulation is proposed in which an AC-DC system is modeled as a combination of AC grids, DC grids, injectors, AC two-ports and AC/DC converters, respectively. This modular modelling facilitates the dynamic ...

Papangelis, L., Panciatici, P., Debry, M.-S., & Van Cutsem, T. (2015). A dynamic simulation approach to identify additional reactive reserves against long-term voltage instability.

*Proc. of IEEE PES 2015 PowerTech conference*.Peer reviewed

A simple method is proposed to identify additional
reactive reserves enabling to counteract long-term voltage instability
after a large disturbance. In contrast to the many references
based on power flow ...

Rousseaux, P., Toubeau, J.-F., De Grève, Z., Vallée, F., Glavic, M., & Van Cutsem, T. (2015). A new formulation of state estimation in distribution systems including demand and generation states.

*proceeedings of the 2015 Power Tech conference*.Peer reviewed

Distribution system state estimation faces a major difficulty: the lack of real-time measurements. This imposes to add information, usually pseudo-measurements from historical data. This paper proposes a ...

Papangelis, L., Guillaud, X., & Van Cutsem, T. (2015). Frequency support among asynchronous AC systems through VSCs emulating power plants.

*Proc. 11th IET Conference on AC and DC Power Transmission*(pp. 9).Peer reviewed

This paper proposes a new control scheme for the Voltage Source Converters (VSCs) of a High Voltage Direct Current (HVDC) grid connecting asynchronous AC systems, so that the latter can mutually support their ...

Aristidou, P., Fabozzi, D., & Van Cutsem, T. (2014). Dynamic Simulation of Large-scale Power Systems Using a Parallel Schur-complement-based Decomposition Method.

*IEEE Transactions on Parallel and Distributed Systems, 25*(10), 2561-2570.Peer reviewed (verified by ORBi)

Power system dynamic simulations are crucial for the operation of electric power systems as they provide important information on the dynamic evolution of the system after an occurring disturbance. This paper ...

Otomega, B., Glavic, M., & Van Cutsem, T. (2014). A two-level emergency control scheme against power system voltage instability.

*Control Engineering Practice, 30*, 93-104.Peer reviewed (verified by ORBi)

A two-level adaptive control scheme against power system voltage instability is proposed, to deal with emergency conditions by acting on distribution transformers and/or by curtailing some loads. The lower ...

Aristidou, P., & Van Cutsem, T. (2014). Dynamic Simulations of Combined Transmission and Distribution Systems using Parallel Processing Techniques.

*Proceedings of the 18th PSCC*.Peer reviewed

Simulating a power system with both transmission and distribution networks modeled in detail is a huge computational challenge. In this paper, we propose a Schur-complement-based domain decomposition algorithm ...

Weckesser, T., Jóhansson, H., Ostergaard, J., & Van Cutsem, T. (2014). Sensitivity based Assessment of Transient Voltage Sags caused by Rotor Swings.

*Proc. 18th Power System Computation Conference*.Peer reviewed

The paper introduces an approach to investigate voltage sags, which are caused by large generator rotor swings following a transient disturbance. Therefore, the method exploits sensitivities derived from the ...

Plumier, F., Aristidou, P., Geuzaine, C., & Van Cutsem, T. (2014). A relaxation scheme to combine Phasor-Mode and Electromagnetic Transients Simulations.

*Proceedings of the 18th Power System Computation Conference*.Peer reviewed

This paper deals with a new scheme for coupling phasor-mode and electromagnetic transients simulations. In each simulation, an iteratively updated linear equivalent is used to represent the effect of the ...

Aristidou, P., & Van Cutsem, T. (2014). Algorithmic and Computational Advances for Fast Power System Dynamic Simulations.

*Proceedings of the IEEE PES General Meeting*.Peer reviewed

In this paper, some algorithmic and computational advances are presented for power system dynamic simulations. The heart is a Schur-complement-based solution algorithm, stemming from domain decomposition ...

Plumier, F., Geuzaine, C., & Van Cutsem, T. (2014). On the convergence of relaxation schemes to couple phasor-mode and electromagnetic transients simulations.

*Proceedings of the IEEE PES General Meeting*.Peer reviewed

Hybrid simulations combining phasor-mode and electromagnetic transients models aim at taking advantage of computational speed of the former and accuracy of the latter. For simulation accuracy, a relaxation ...

Weckesser, T., Johannsson, H., & Van Cutsem, T. (2014). Early Prediction of Transient Voltage Sags caused by Rotor Swings.

*Proc. IEEE PES general meeting*.Peer reviewed

The paper investigates various methods to predict voltage sags at load buses caused by large generator rotor swings and following a transient disturbance. Three different prediction methods are proposed, which ...

Aristidou, P., Olivier, F., Hervas, M. E., Ernst, D., & Van Cutsem, T. (2014). Distributed Model-free Control of Photovoltaic Units for Mitigating Overvoltages in Low-Voltage Networks.

*Proc. of CIRED 2014 workshop*(pp. 0087).Peer reviewed

In this paper, a distributed model-free control scheme to mitigate overvoltage problems caused by high photovoltaic generation in low-voltage feeders is proposed. The distributed controllers are implemented on ...

Soleimani Bidgoli, H., Glavic, M., & Van Cutsem, T. (2014). MODEL PREDICTIVE CONTROL OF CONGESTION AND VOLTAGE PROBLEMS IN ACTIVE DISTRIBUTION NETWORKS.

*Proc. of CIRED Workshop 2014*(pp. 0108).Peer reviewed

This paper presents a centralized control scheme, inspired of Model Predictive Control (MPC), to manage thermal overloads and correct abnormal voltages in real-time. The control scheme is able to smoothly ...

Aristidou, P., & Van Cutsem, T. (2014). Parallel Computing and Localization Techniques for Faster Power System Dynamic Simulations.

*Proceedings of Cigre 2014 Belgium Conference*.Peer reviewed

Dynamic simulation studies are used to analyze the behavior of power systems after a
disturbance has occurred. This type of simulation is essential when the system is operating
close to its stability limits ...

Aristidou, P., Fabozzi, D., & Van Cutsem, T. (2014). A Schur Complement Method for DAE Systems in Power System Dynamic Simulations. In J., Erhel, M., Gander, L., Halpern, G., Pichot, T., Sassi, & O., Widlund (Eds.),

*Domain Decomposition Methods in Science and Engineering XXI*(pp. 719-727). Springer International Publishing.Peer reviewed

This paper proposes a Schur complement-based Domain Decomposition Method to accelerate the time-domain simulation of large, non-linear and stiff Differential and Algebraic Equation systems stemming from power ...

Fabozzi, D., Chieh, A., Haut, B., & Van Cutsem, T. (2013). Accelerated and Localized Newton Schemes for Faster Dynamic Simulation of Large Power Systems.

*IEEE Transactions on Power Systems, 28*(4), 4936-4947.Peer reviewed (verified by ORBi)

This paper proposes two methods to speed up the demanding time-domain simulations of large power system models. First, the sparse linear system to solve at each Newton iteration is decomposed according to its ...

Valverde Mora, G., & Van Cutsem, T. (2013). Model Predictive Control of Voltages in Active Distribution Networks.

*IEEE Transactions on Smart Grid, 4*(4), 2152-2161.Peer reviewed (verified by ORBi)

This paper presents a centralized control scheme to regulate distribution network voltages in the presence of high penetration of distributed generation. The approach is inspired of Model Predictive Control in ...

Van Cutsem, T., & Papangelis, L. (2013).

*Description, Modeling and Simulation Results of a Test System for Voltage Stability Analysis*. université de Liège.This report details the models and the data of the so-called Nordic test system used by the Univ. of Liege team in several research works. The aim of the report is to make the data available to other ...

Glavic, M., & Van Cutsem, T. (2013). Tracking network state from combined SCADA and synchronized phasor measurements.

*Proceedings of the 2013 IREP Symposium-Bulk Power System Dynamics and Control -IX*(pp. 1-10).Peer reviewed

Initiated by the authors’ previous work on state reconstruction from a limited number of synchrophasors [1], this paper goes one step further by exploring the possibility to track the network state using both ...

Plumier, F., Geuzaine, C., & Van Cutsem, T. (2013). A multirate approach to combine electromagnetic transients and fundamental-frequency simulations.

*Proc. 10th International Conference on Power System Transients*.Peer reviewed

Abstract--- A new multi-rate technique is proposed to combine fundamental-frequency simulation (typical of stability studies) with electromagnetic transients simulation. The objective of this hybrid approach ...

Aristidou, P., Fabozzi, D., & Van Cutsem, T. (2013). Exploiting Localization for Faster Power System Dynamic Simulations.

*Proc. IEEE PES 2013 PowerTech Conference*.Peer reviewed

This paper proposes an algorithm for exploiting the localized response of power system components to accelerate dynamic simulations. During the simulation, components marginally participating to the system ...

Aristidou, P., & Van Cutsem, T. (2013). Dynamic Simulations of Combined Transmission and Distribution Systems using Decomposition and Localization.

*Proc. IEEE PES 2013 PowerTech Conference*.Peer reviewed

Simulating a power system with both transmission and distribution networks modeled is a challenging task. On the one hand, it is difficult to set up equivalents restituting the dynamic behavior of aggregated ...

Otomega, B., & Van Cutsem, T. (2013). Distributed load interruption and shedding against voltage delayed recovery or instability.

*Proc. IEEE PES 2013 PowerTech Conference*.Peer reviewed

This paper deals with a two-part system integrity protection scheme to be installed in distribution networks, to counteract fault-induced delayed voltage recovery or even short-term voltage instability due to ...

Valverde, G., & Van Cutsem, T. (2013). Control of Dispersed Generation to Regulate Distribution and Support Transmission Voltages.

*Proc. IEEE PES 2013 PowerTech Conference*.Peer reviewed

This paper presents an on-line centralized controller based on Model Predictive Control concepts to regulate distribution network voltages, and possibly support transmission network. It computes and applies a ...

Van Cutsem, T., & Valverde, G. (2013). COORDINATED VOLTAGE CONTROL OF DISTRIBUTION NETWORKS HOSTING DISPERSED GENERATION.

*Proc. 22nd International conference on Electricity Distribution*. United Kingdom.Peer reviewed

This paper presents a centralized control scheme to regulate distribution network voltages in the presence of dispersed generation. The algorithm resorts to model predictive control to smoothly bring ...

Glavic, M., & Van Cutsem, T. (2013). Reconstructing and Tracking Network State from a Limited Number of Synchrophasor Measurements.

*IEEE Transactions on Power Systems, 28*, 1921-1929.Peer reviewed (verified by ORBi)

A method is proposed to reconstruct and track network state from a limited number of Phasor Measurement Unit (PMU) data. To deal with the resulting unobservability, the state with bus powers and generator ...

Hajian, M., Rosehart, W., Glavic, M., Zareipour, H., & Van Cutsem, T. (2013). Linearized Power Flow Equations Based Predictive Control of Transmission Voltages.

*Proceedings of the 46th Hawaii International Conference on System Sciences (HICSS-46)*(pp. 2298 - 2304).Peer reviewed

In this paper, an approach based on the concept of Model Predictive Control (MPC) is used to control transmission voltages and prevent long-term voltage instability. The MPC model is based on a linearized ...

Otomega, B., Glavic, M., & Van Cutsem, T. (2012). Wide-Area Adaptive Load Shedding Control to Counteract Voltage Instability.

*Proceedings of the Power Plant and Power System Control Conference (PPPSC 2012)*.Peer reviewed

A two-level adaptive load shedding scheme against voltage instability is proposed, adjusting its actions to the severity of the situation. The lower level includes a set of distributed controllers which ...

Fabozzi, D. (2012).

*Decomposition, Localization and Time-Averaging Approaches in Large-Scale Power System Dynamic Simulation*. Unpublished doctoral thesis, University of Liege, Belgium.Present-day interconnected electric power systems are the largest machines in the world. Guaranteeing a stable supply of electric power is vital for modern societies: power systems must be able to withstand ...

Glavic, M., & Van Cutsem, T. (2012). State Reconstruction from a Limited Number of Synchronized Phasor Measurements: Application to Voltage Instability Detection.

*Proceedings of the IEEE PES General Meeting*.This paper deals with the performance of the wide-area monitoring previously proposed by the authors in [1], [2] for early detection of voltage instability, when a limited number of synchronized phasor ...

Aristidou, P., Fabozzi, D., & Van Cutsem, T. (2012, June 28).

*A Schur Complement Method for DAE Systems in Power System Simulations*. Paper presented at The Twenty First International Conference on Domain Decomposition Methods, Rennes, France.The power system networks in North America and Europe are the largest man-made interconnected systems in the world. Many power system applications rely on time consuming dynamic simulations of large-scale ...

Ramirez-Betancour, R., Fuerte-Esquivel, C., & Van Cutsem, T. (2012). A two-time scale simulation for dynamic analysis of power systems.

*Electric Power Systems Research, 83*, 185-195.Peer reviewed (verified by ORBi)

This paper proposes a two-time scale simulation approach of both short-term and long-term dynamics in power systems. The short-term transient period is analyzed by a full-time scale simulation while a quasi ...

Van Cutsem, T., & Fabozzi, D. (2011, December 06).

*Simplified dynamic simulation*. Paper presented at IEEE Innovative Smart Grid Technologies (ISGT) Europe 2011, Manchester, United Kingdom.These are the slides of an invited presentation at the panel session "Pan European Grid Advanced Simulation and State Estimation (PEGASE)", aimed at disseminating the results of the PEGASE project funded by ...

Fabozzi, D., & Van Cutsem, T. (2011). Assessing the Proximity of Time Evolutions through Dynamic Time Warping.

*IET Generation, Transmission and Distribution, 5*(12), 1268-1276.Peer reviewed (verified by ORBi)

Comparing time-series is a frequent task in many scientific fields. In power systems, in particular,
it may be of interest to compare the outputs of a simplified and a detailed model, or to validate the ...

Glavic, M., & Van Cutsem, T. (2011). State Reconstruction from Synchronized Phasor Measurements.

*Proceedings of the IEEE PES Innovative Smart Grid Technologies Europe 2011*.Peer reviewed

The traditional state estimator relies on measurements affected by time skew and, while the whole system can be made observable, it cannot track the post-disturbance dynamics. Synchronized phasor measurements ...

Fabozzi, D., Chieh, A. S., Panciatici, P., & Van Cutsem, T. (2011). On simplified handling of state events in time-domain simulation.

*Proceedings of the 17th PSCC*.Peer reviewed

The power system models typically used in dynamic simulations involve discrete events in addition to the standard differential-algebraic equations. Those events cause the system to jump from one continuous ...

Glavic, M., Hajian, M., Rosehart, W., & Van Cutsem, T. (2011). Receding-horizon multi-step optimization to correct nonviable or unstable transmission voltages.

*IEEE Transactions on Power Systems, 26*(3), 1641-1650.Peer reviewed (verified by ORBi)

In this paper, a receding-horizon multi-step optimization is proposed to correct non viable transmission voltages and prevent long-term voltage instability. The proposed control scheme is based on real-time ...

Glavic, M., & Van Cutsem, T. (2011). A short Survey of Methods for Voltage Instability Detection.

*Proceedings of the IEEE PES General Meeting*.Peer reviewed

This paper shortly surveys existing and proposed methods for voltage instability detection. The emphasis is on methods relying on real-time measurements as well as on long-term voltage instability. Methods are ...

Glavic, M., & Van Cutsem, T. (2011). Investigating State Reconstruction from Scarce Synchronized Phasor Measurements.

*Proceedings of the IEEE Trondheim Power Tech 2011 conference*.Peer reviewed

Synchronized phasor measurements can potentially track the system dynamics between two classical state estimations. However, in the PMU configurations available nowadays and in the near future, those ...

Otomega, B., & Van Cutsem, T. (2011). A load shedding scheme against both short- and long-term voltage instabilities in the presence of induction motors.

*Proceedings of the IEEE Trondheim Power Tech 2011 conference*.Peer reviewed

In the presence of induction motors in loads, long-term voltage instability may result in sharp voltage decreases, once the generators supporting transmission voltages have their field currents limited ...

Fabozzi, D., & Van Cutsem, T. (2011). On angle references in long-term time-domain simulations.

*IEEE Transactions on Power Systems, 26*(1), 483-484.Peer reviewed (verified by ORBi)

Abstract—In power system dynamic models the complex network equations and the various phasors are projected onto reference axes. After a short critical review of commonly chosen reference axes, this letter ...

Gomez-Exposito, A., de la Villa Jaen, A., Gomez-Quiles, C., Rousseaux, P., & Van Cutsem, T. (2011). A Taxonomy of Multi-Area State Estimation Methods.

*Electric Power Systems Research, 81*(4), 1060-1069.Peer reviewed (verified by ORBi)

This paper presents a critical review of the state of the art in Multi-Area State Estimation (MASE) methods, which are currently gaining renewed interest due to their capability of properly tracking multi-TSO ...

Lebeau, S., Qako, N., & Van Cutsem, T. (2010). Wind integration and AGC frequency dynamics simulations using Quasi Steady-State approximation.

*Proc. of 9th international workshop on large-scale integration of wind power in powers systems*.Frequency dynamics studies are important at Hydro-Québec (HQ). Wind integration raises questions about HQ ability to maintain frequency regulation in normal operation and during contingencies. Quasi Steady ...

Fabozzi, D., & Van Cutsem, T. (2010). Localization and latency concepts applied to time simulation of large power systems.

*Proceedings of the 2010 IREP Symposium*.Peer reviewed

This paper reports on investigations to speed up time domain simulations of large electric power systems. First, a decomposed scheme is considered which exploits the bordered block diagonal structure of the ...

Marinakis, A., Bakirtzis, A., & Van Cutsem, T. (2010). Energy and Transmission Allocation in the presence of Overlapping Electricity Markets.

*IEEE Transactions on Power Systems, 25*(3), 1402-1414.Peer reviewed (verified by ORBi)

The possibility for market participants to simultaneously place their bids in different markets across an interconnection is investigated in this paper. Transaction schedulers settle multilateral transactions ...

Vournas, C., Lambrou, C., Glavic, M., & Van Cutsem, T. (2010). An integrated autonomous protection system against voltage instability based on Load Tap Changers.

*Proceedings of the 2010 IREP Symposium- Bulk Power System Dynamics and Control – VIII*.Peer reviewed

In this paper we propose a local, completely autonomous protection system against voltage instability that can be readily integrated in the controller of each bulk power delivery LTC transformer. The ...

Glavic, M., & Van Cutsem, T. (2010). Adaptive Wide-Area Closed-Loop Undervoltage Load Shedding Using Synchronized Measurements.

*Proceedings of IEEE PES 2010 General Meeting*.Peer reviewed

This paper proposes an emergency load shedding scheme aimed at stopping a developing voltage instability before system disruption. The proposed scheme has a wide-area view of the system, adapts itself to the ...

Marinakis, A., & Van Cutsem, T. (2010). Energy and transmission allocation in overlapping electricity markets : incorporating N-1 security and accounting for losses.

*Proceedings of the 7th international conference on the European Electricity Market*.Peer reviewed

The possibility for market participants to place their bids in markets where they are not geographically located is investigated in this paper. An iterative procedure enabling the simultaneous clearing of ...

Marinakis, A., Glavic, M., & Van Cutsem, T. (2010). Minimal Reduction of Unscheduled Flows for Security Restoration: Application to Phase Shifter Control.

*IEEE Transactions on Power Systems, 25*(1), 506-515.Peer reviewed (verified by ORBi)

More and more transmission system operators, noticeably in Europe, equip their systems with phase shifting transformers to counteract transit flows that take place in a large meshed interconnection. This paper ...

Zarate-Minano, R., Van Cutsem, T., Milano, F., & Conejo, A. (2010). Securing Transient Stability using Time-Domain Simulations within an Optimal Power Flow.

*IEEE Transactions on Power Systems, 25*(1), 243-253.Peer reviewed (verified by ORBi)

This paper provides a methodology to restore transient stability. It relies on a well-behaved optimal power flow model with embedded transient stability constraints. The proposed methodology can be used for ...

Capitanescu, F., Otomega, B., Lefebvre, H., Sermanson, V., & Van Cutsem, T. (2009). Decentralized tap changer blocking and load shedding against voltage instability: prospective tests on the RTE system.

*International Journal of Electrical Power and Energy Systems, 31*(9), 570-576.Peer reviewed (verified by ORBi)

This paper reports on prospective tests of a system protection scheme against long-term voltage instability relying on a set of distributed controllers, each monitoring a transmission voltage, blocking tap ...

Glavic, M., & Van Cutsem, T. (2009). Wide-area Detection of Voltage Instability from Synchronized Phasor Measurements. Part I: Principle.

*IEEE Transactions on Power Systems, 24*(3), 1408 - 1416.Peer reviewed (verified by ORBi)

This two-part paper deals with the early detection of an impending voltage instability from the system states provided by synchronized phasor measurements. Recognizing that voltage instability detection ...

Glavic, M., & Van Cutsem, T. (2009). Wide-area Detection of Voltage Instability from Synchronized Phasor Measurements. Part II: Simulation results.

*IEEE Transactions on Power Systems, 24*(3), 1417 - 1425.Peer reviewed (verified by ORBi)

This two-part paper deals with the early detection of an impending voltage instability from the system states provided by synchronized phasor measurements. Recognizing that voltage instability detection ...

Fabozzi, D., Glavic, M., Wehenkel, L., & Van Cutsem, T. (2009). Security Assessment by Multiple Transmission System Operators Exchanging Sensitivity and Tie-Line Power Flow Information.

*Proceedings of the 2009 IEEE PES Power Tech conference*.Peer reviewed

This paper considers a procedure for multi-area static security assessment of large interconnected power systems operated by a team of Transmission System Operators (TSOs). In this procedure, each TSO provides ...

Fabozzi, D., & Van Cutsem, T. (2009). Simplified time-domain simulation of detailed long-term dynamic models.

*Proceedings of the 2009 IEEE PES General Meeting*.Peer reviewed

Time-domain simulation of power system long-term dynamics involves the solution of large sparse systems of nonlinear stiff differential-algebraic equations. Simulation tools have traditionally focused on the ...

Marinakis, A., Rosehart, W., & Van Cutsem, T. (2009). A Framework for the Simultaneous Clearing of Multiple Markets within a Common Transmission System.

*Proceedings of the 2009 IEEE PES Power Tech conference*.Peer reviewed

The possibility for market participants to place their bids in all the markets of an interconnection irrespective of where they are physically connected is investigated in this paper. A mechanism is proposed ...

Otomega, B., & Van Cutsem, T. (2009). Local vs. wide-area undervoltage load shedding in the presence of induction motor loads.

*Proceedings of the IEEE PES PowerTech 2009 conference*.Peer reviewed

In the presence of induction motor loads, long-term voltage instability may end up in a sharp voltage decrease, which makes the tuning of undervoltage load shedding more delicate. This paper first investigates ...

Capitanescu, F., Van Cutsem, T., & Wehenkel, L. (2009). Coupling optimization and dynamic simulation for preventive-corrective control of voltage instability.

*IEEE Transactions on Power Systems, 24*(2), 796 - 805.Peer reviewed (verified by ORBi)

This paper proposes an approach coupling security constrained optimal power flow with time-domain simulation to determine an optimal combination of preventive and corrective controls ensuring a voltage stable ...

Marinakis, A., Bakirtzis, A., & Van Cutsem, T. (2009). Bidding and managing congestion across multiple electricity spot markets.

*Proc. 6th Intern. Conference on the European Energy Market*.Peer reviewed

The possibility for market participants to place their bids in markets where they are not geographically located is investigated in this paper. A framework for managing the resulting congestion is proposed ...

Stubbe, M., Karoui, K., Van Cutsem, T., & Wehenkel, L. (2008, December). Le projet PEGASE.

*Revue E: Revue d'Electricité et d'Electronique Industrielle*, (4), 37-41.Peer reviewed

A group of Transmission System Operators (TSO’s), expert companies and leading research centers in power system analysis and applied mathematics, under the coordination of Tractebel Engineering, has joined to ...

Wehenkel, L., Ernst, D., Rousseaux, P., & Van Cutsem, T. (2008, December). Research and Education Activities in Electric Power Systems at the University of Liège.

*Revue E: Revue d'Electricité et d'Electronique Industrielle*, (4), 54-59.Peer reviewed

This paper presents research and education activities of the power systems group of the Department of Electrical Engineering and Computer Science of the University of Liège. These activities cover power ...

Vournas, C., & Van Cutsem, T. (2008). Local Identification of Voltage Emergency Situations.

*IEEE Transactions on Power Systems, 23*(3), 1239-1248.Peer reviewed (verified by ORBi)

This paper proposes a simple procedure to identify the onset of long-term voltage instability from the time evolution of the distribution voltages controlled by load tap changers. The moving average of sampled ...

Capitanescu, F., Otomega, B., Lefebvre, H., Sermanson, V., & Van Cutsem, T. (2008). PROSPECTS OF AN IMPROVED SYSTEM PROTECTION SCHEME AGAINST VOLTAGE INSTABILITY IN THE RTE SYSTEM.

*Proc. 16th Power System Computation Conference (PSCC)*.Peer reviewed

This paper reports on prospective tests of a system protection scheme against long-term voltage instability relying on a set of distributed controllers, each monitoring a transmission voltage, blocking tap ...

Glavic, M., & Van Cutsem, T. (2008). Detecting with PMUs the onset of voltage instability caused by a large disturbance.

*Proc. IEEE PES General Meeting*.Peer reviewed

This paper deals with long-term voltage instability triggered by the outage of transmission or generation equipments. It is shown how the onset of voltage instability could be detected in real-time from post ...

Vournas, C., Sakellaridis, N., Christoforidis, G., Kabouris, Y., & Van Cutsem, T. (2008). INVESTIGATION OF A LOCAL INDICATOR OF VOLTAGE EMERGENCY IN THE HELLENIC INTERCONNECTED SYSTEM.

*Proc. 16th Power System Computation Conference (PSCC)*.Peer reviewed

In this paper we evaluate the performance of a proposed local indicator of voltage emergency for a simulated unstable contingency of the Hellenic Intercon-nected System identified through the on-line VSA ...

Otomega, B., Glavic, M., & Van Cutsem, T. (2007). Distributed undervoltage load shedding.

*IEEE Transactions on Power Systems, 22*(4), 2283-2284.Peer reviewed (verified by ORBi)

A new design of load shedding against long-term voltage instability is proposed. It uses a set of distributed controllers, each monitoring a transmission voltage, controlling a group of loads, acting in closed ...

Otomega, B., & Van Cutsem, T. (2007). Identifying plausible cascading events in system stability assessment.

*Proc. 3rd International Conference on Energy and Environment (CIEM2007)*.An implementation of the event tree approach is proposed to determine possible sequences of cascading failures with severe impact on a given power system. The algorithm takes into account protection systems ...

Otomega, B., & Van Cutsem, T. (2007). Undervoltage load shedding using distributed controllers.

*IEEE Transactions on Power Systems, 22*(4), 1898-1907.Peer reviewed (verified by ORBi)

A new load shedding scheme against long-term voltage instability is proposed. It uses a set of distributed controllers, each monitoring transmission voltages in a zone and controlling a group of related loads ...

Capitanescu, F., & Van Cutsem, T. (2007). A unified management of congestions due to voltage instability and thermal overload.

*Electric Power Systems Research, 77*(10), 1274-1283.Peer reviewed (verified by ORBi)

This paper proposes two approaches for a unified management of congestions due to voltage instability and thermal overload in a deregulated environment. Both techniques aim to remove, in some optimal manner ...

Otomega, B., Marinakis, A., Glavic, M., & Van Cutsem, T. (2007). Model predictive control to alleviate thermal overloads.

*IEEE Transactions on Power Systems, 22*(3), 1384-1385.Peer reviewed (verified by ORBi)

An approach inspired by model predictive control is proposed to determine a sequence of control actions aimed at alleviating thermal overloads. The algorithm brings the line currents below their limits in the ...

Marinakis, A., Glavic, M., & Van Cutsem, T. (2007). Control of phase shifting transformers by multiple transmission system operators.

*Proc. IEEE PES PowerTech conference*(pp. 119-124).Peer reviewed

A general framework is proposed for the control of phase shifting transformers owned by several TSOs, taking into account their interactions. The proposed solution is the Nash equilibrium of a sequence of ...

Otomega, B., Marinakis, A., Glavic, M., & Van Cutsem, T. (2007). Emergency alleviation of thermal overloads using model predictive control.

*Proc. IEEE PES PowerTech conference*(pp. 201-206).Peer reviewed

An approach inspired of Model Predictive Control is proposed to determine a sequence of control actions aimed at alleviating thermal overloads in emergency conditions. The algorithm brings the line currents ...

Van Cutsem, T., & Vournas, C. (2007). Emergency Voltage Stability Controls: an Overview.

*Proc. IEEE PES General Meeting*.Peer reviewed

This paper provides an overview of emergency voltage stability controls in power systems. First, a brief review is made of voltage instability mechanisms, countermeasures, and system protection schemes. Next ...

Otomega, B., Glavic, M., & Van Cutsem, T. (2007). A purely distributed implementation of undervoltage load shedding.

*Proc. IEEE PES General Meeting*.Peer reviewed

A new design of load shedding against long-term voltage instability is proposed. It uses a set of distributed controllers, each monitoring a transmission voltage and controlling a group of loads. Each ...

Van Cutsem, T., Grenier, M.-E., & Lefebvre, D. (2006). Combined detailed and quasi steady-state time simulations for large-disturbance analysis.

*International Journal of Electrical Power and Energy Systems, 28*(9), 634-642.Peer reviewed (verified by ORBi)

This paper deals with the simulation of long-term responses of power systems to large disturbances in the presence of discrete events. After outlining the power system model under the quasi steady-state (QSS ...

Van Cutsem, T., Renoy, Q., & Lefebvre, D. (2006). Modelling the short-term and long-term aggregate response of multiple loads fed through a sub-transmission network.

*Proc. Power System Conference and Exposition, 2006 (PSCE '06)*(pp. 569-575).Peer reviewed

This paper addresses the problem of representing the aggregate response to voltage changes of a set of loads fed through distribution transformers connected by a subtransmission network. A simple, while ...

Glavic, M., & Van Cutsem, T. (2006). Some Reflections on Model Predictive Control of Transmission Voltages.

*Proc. 38th North American Power Symposium*(pp. 625-632).Peer reviewed

This paper deals with the application of algorithms inspired by Model Predictive Control to solve voltage-related power system control problems in both normal and emergency operating conditions. In the first ...

Christoforidis, G., Kabouris, J., Vournas, C., & Van Cutsem, T. (2006). EXPERIENCE GAINED BY THE APPLICATION OF A REAL-TIME VOLTAGE SECURITY ASSESSMENT METHOD AT THE HELLENIC TRANSMISSION SYSTEM OPERATOR.

*Proc. 2006 CIGRE Conference*(pp. 2-206).Voltage instability is widely recognized as a significant threat of power system blackout. As far as real-time operation is concerned, there is a need for appropriate tools to identify dangerous contingencies ...

Rousseaux, P., & Van Cutsem, T. (2006). Quasi steady-state simulation diagnosis using Newton method with optimal multiplier.

*IEEE PES General Meeting (Montreal)*.Peer reviewed

This paper deals with the quasi steady-state approximation of the long-term dynamics. This fast time simulation method assumes that the short-term dynamics are stable and can be replaced by their equilibrium ...

Van Cutsem, T., & Vournas, C. (2006). Emergency monitoring and corrective control of voltage instability. In S., Savulescu (Ed.),

*Real-Time Stability in Power Systems: Techniques for Early Detection of the Risk of Blackout*(pp. 4, 26). Springer.After reviewing the basic voltage instability mechanisms, this chapter de-scribes emergency measures that can be used in order to contain voltage insta-bility and prevent a voltage collapse leading to a ...

Vournas, C., & Van Cutsem, T. (2006). On-line voltage security assessment. In S., Savulescu (Ed.),

*Real-time stability in power systems: Techniques for the early detection of the risk of blackout*(pp. 5, 28). Springer.This chapter deals with voltage security assessment and its on-line application. Methods for contingency analysis are briefly reviewed. The associated con-cepts of transfer capability, loadability limit, and ...

Christoforidis, G., Kabouris, J., Vournas, C., & Van Cutsem, T. (2005). INVESTIGATION OF PARAMETERS AFFECTING VOLTAGE SECURITY OF THE HELLENIC INTERCONNECTED SYSTEM.

*Proc. 15th Power System Computation Conference (PSCC)*.Peer reviewed

The Hellenic Interconnected System pre-sents a structural geographical imbalance between generation sites and load centers. This imbalance leads to bulk power transfers on long electrical distances leading to ...

Van Cutsem, T., Grenier, M.-E., & Lefebvre, D. (2005). Combined detailed and quasi steady-state time simulations for large-disturbance analysis.

*Proc. 15th Power System Computation Conference (PSCC)*.Peer reviewed

This paper deals with the simulation of long-term power system responses to large disturbances
in the presence of discrete events. A method combining detailed and quasi steady-state time simulations is ...

Grenier, M.-E., Lefebvre, D., & Van Cutsem, T. (2005). Quasi steady-state models for long-term voltage and frequency dynamics simulation.

*Proc. IEEE Power Tech conference*(pp. 198).Peer reviewed

The Quasi Steady-State (QSS) approximation of long-term dynamics relies on time-scale decomposition and consists of replacing faster phenomena by their equilibrium conditions, in order to reduce the complexity ...

Otomega, B., & Van Cutsem, T. (2005). Fast contingency filtering based on linear voltage drop estimates.

*Proc. IEEE PowerTech Conference*(pp. 324).Peer reviewed

This paper deals with the filtering of harmless contingencies in voltage stability and security analyses. In many systems, a post-contingency load flow allows to identify the contingencies with severe impact ...

Capitanescu, F., & Van Cutsem, T. (2005). Unified sensitivity analysis of unstable or low voltages caused by load increases or contingencies.

*IEEE Transactions on Power Systems, 20*(1), 321-329.Peer reviewed (verified by ORBi)

This paper deals with the analysis of situations where load increases and/or contingencies cause transmission voltages to become unstable or unacceptably low. Simple sensitivities are proposed to determine the ...

Van Cutsem, T., Kabouris, J., Christoforidis, G., & Vournas, C. (2005). Application of real-time voltage security assessment to the Hellenic Interconnected System.

*IEE Proceedings. Generation, Transmission and Distribution, 152*(1), 123-131.Peer reviewed (verified by ORBi)

The online voltage security assessment methods implemented at the national control centre of the Hellenic Interconnected System, within the framework of the OMASES project funded by the European Union are ...

Van Cutsem, T., Hassé, G., Moors, C., Guillon, S., & Mailhot, R. (2004). A new training simulator for improved voltage control of the Hydro-Québec system.

*Proc. IEEE Power System Conference and Exposition (PSCE)*.This paper reports on the development of a training simulator focusing on voltage control and stability. It has been derived from a quasi steady-state simulation software already used and validated in planning ...

Lefebvre, D., Bernard, S., & Van Cutsem, T. (2004). Undervoltage load shedding scheme for the Hydro-Québec system.

*Proc. IEEE PES General Meeting*.In recent years, Hydro-Québec has undertaken a major program to upgrade the reliability of its transmission system. Much effort has been focused on increasing the system's ability to withstand extreme ...

Kundur, P., Paserba, J., Ajjarapu, V., Andersson, G., Bose, A., Canizares, C., Hatziargyriou, N., Hill, D., Stankovic, A., Taylor, C., Van Cutsem, T., & Vittal, V. (2004). Definition and Classification of Power System Stability.

*IEEE Transactions on Power Systems, 19*(2), 1387-1401.Peer reviewed (verified by ORBi)

The problem of defining and classifying power system stability has been addressed by several previous CIGRE and IEEE Task Force reports. These earlier efforts, however, do not completely reflect current ...

Vournas, C., Potamianakis, E. G., Moors, C., & Van Cutsem, T. (2004). An educational simulation tool for power system control and stability.

*IEEE Transactions on Power Systems, 19*(1), 48-55.Peer reviewed (verified by ORBi)

This paper presents a Simulink-based educational tool developed for the purpose of illustrating power system control and stability notions as well as introducing students to realistic, though tractable in size ...

Capitanescu, F. (2003).

*Preventive assessment and enhancement of power system voltage stability: an integrated approach of thermal and voltage security*.This thesis is devoted to the preventive assessment and enhancement of voltage
stability and security in electric power systems. However, in the course of
deriving all the proposed methods we have paid ...

Lefebvre, D., Moors, C., & Van Cutsem, T. (2003). Design of an undervoltage load shedding scheme for the Hydro-Québec system.

*Proc. IEEE PES General Meeting*.This paper deals with the control logic of an undervoltage, closed-loop load shedding scheme aimed at protecting the Hydro-Quebec system against long-term voltage instability. This scheme relies on a set of ...

Bihain, A., Cirio, D., Fiorina, M., Lopez, R., Lucarella, D., Massucco, S., Ruiz Vega, D., Vournas, C., Van Cutsem, T., & Wehenkel, L. (2003). OMASES: A DYNAMIC SECURITY ASSESSMENT TOOL FOR THE NEW MARKET ENVIRONMENT.

*Proc. IEEE Bologna Power Tech Conference*(pp. 473).Peer reviewed

The paper presents the efforts and results of a large consortium of European Industries, Research Centers and Universities involved in an EU research project named OMASES in the field of Power System Dynamic ...

Otomega, B., Sermanson, V., & Van Cutsem, T. (2003). Reverse-logic control of load tap changers in emergency voltage conditions.

*Proc. IEEE Bologna Power Tech conference*(pp. 450).Peer reviewed

This papers deals with the emergency control of Load Tap Changers (LTCs) to face low transmission voltages or voltage instability situations. The proposed simple control logic consists in reverting the tap ...

Vournas, C., Manos, G., Kabouris, J., Christoforidis, G., Hassé, G., & Van Cutsem, T. (2003). On-Line Voltage Security Assessment of the Hellenic Interconnected System.

*Proc. IEEE Bologna Power Tech conference*(pp. 465).Peer reviewed

This paper describes the on-line Voltage Security Assessment environment developed within the framework of the EU-sponsored OMASES project, as well as its application to the Greek Interconnected Power System ...

Capitanescu, F., & Van Cutsem, T. (2002). Computation of simultaneous available transfer capability under thermal and voltage security constraints.

*Proc. MEPS 02 conference*.Peer reviewed

This paper proposes a method to compute
the Available Transfer Capability (ATC) of a power
system under both thermal and voltage security constraints.
The objective is to determine, in some optimal
manner ...

Capitanescu, F., & Van Cutsem, T. (2002). Evaluating bound on voltage and thermal security margins under power transfer uncertainty.

*Proc. 14th Power System Computation Conference*(pp. 41, paper 3).Peer reviewed

This paper deals with the evaluation of bounds on voltage and thermal security margins with respect to contingencies. A margin is the maximal pre-contingency power transfer between either a generation and a ...

Capitanescu, F., & Van Cutsem, T. (2002). Preventive control of voltage security margins: A multicontingency sensitivity-based approach.

*IEEE Transactions on Power Systems, 17*(2), 358-364.Peer reviewed (verified by ORBi)

This paper addresses the problem of changing the operating point of a power system in order to keep voltage security margins with respect to contingencies above some minimal value. Margins take on the form of ...

Van Cutsem, T., Moors, C., & Lefebvre, D. (2002). Design of Load Shedding Schemes against Voltage Instability using Combinatorial Optimization.

*Proc. 2002 IEEE PES Winter Meeting*(pp. 2, pp. 848 - 853).This paper proposes a methodology for the design of automatic load shedding against voltage instability. In a first step, we describe a method allowing to find the minimal shedding required in a given unstable ...

Loud, L., Rousseaux, P., Lefebvre, D., & Van Cutsem, T. (2001). A Time-Scale Decomposition-Based Simulation Tool for Voltage Stability Analysis.

*Proc. IEEE Porto Power Tech Conference*.Peer reviewed

This paper proposes a time domain simulation tool combining Full Time Scale (FTS) simulation in the short-term period following a contingency and Quasi Steady-State (QSS) approximation for the long-term phase ...

Moors, C., Lefebvre, D., & Van Cutsem, T. (2001). Load Shedding Controllers against Voltage Instability: a comparison of designs.

*Proc. IEEE Porto Power Tech Conference*(pp. 2).This paper discusses and compares three types of undervoltage load shedding closed-loop controllers in terms of performances and design computational effort. We first describe the various controllers and ...

Moors, C., Lefebvre, D., & Van Cutsem, T. (2000). Combinatorial optimization approaches to the design of load shedding schemes against voltage instability.

*Proc 32nd North American Power Symposium (NAPS)*(pp. 10-14 - 10-21).Peer reviewed

This paper proposes a methodology for the design of automatic load shedding against long-term voltage instability. In a first step, a set of training scenarios is set up, corresponding to various operating ...

Van Cutsem, T., Capitanescu, F., Moors, C., Lefebvre, D., & Sermanson, V. (2000). An advanced tool for Preventive Voltage Security Assessment.

*Proc. 7th Symposium of Specialists in Electric Operational and Expansion Planning (SEPOPE)*(pp. 035).Peer reviewed

This paper deals with methods for the preventive assessment of voltage security with respect
to contingencies. We describe a computing tool for the determination of secure operation limits, together with ...

Van Cutsem, T. (2000). Voltage Instability: Phenomena, Countermeasures, and Analysis Methods.

*Proceedings of the IEEE, 88*(2), 208-227.Peer reviewed (verified by ORBi)

A power system may be subject to (rotor) angle, frequency or voltage instability. Voltage instability takes on the form of a dramatic drop of transmission system voltages, which may lead to system disruption ...

Moors, C., Lefebvre, D., & Van Cutsem, T. (2000). Design of Load Shedding Schemes against Voltage Instability.

*Proc. IEEE PES Winter Meeting*(pp. 2, pp. 1495 - 1500).This paper proposes a methodology for the design of automatic load shedding against long-term voltage instability. In a first step, a set of training scenarios is set up, corresponding to various operating ...

Vournas, C., Manos, G., Kabouris, J., & Van Cutsem, T. (2000). Analysis of a Voltage Instability Incident in the Greek Power System.

*Proc. IEEE PES 2000 Winter Meeting*(pp. 2, pp. 1483-1488).The paper reports on a 1996 incident in the Greek power system that had all the characteristics of voltage instability and the subsequent analyses and countermeasures. Voltage stability analysis is performed ...

Van Cutsem, T., Moisse, C., & Mailhot, R. (1999). Determination of secure operating limits with respect to voltage collapse.

*IEEE Transactions on Power Systems, 14*(1), 327-335.Peer reviewed (verified by ORBi)

A secure operating limit is the most stressed among a given set of operating points, such that the system can withstand specified contingencies. It is a general measure of security with respect to incidents ...

Wehenkel, L., Van Cutsem, T., & Pavella, M. (1989). An Artificial Intelligence Framework for On-Line Transient Stability Assessment of Power Systems.

*IEEE Transactions on Power Systems, 4*(2), 789-800.Peer reviewed (verified by ORBi)

A framework is proposed to tackle the online transient stability problem of power systems. Based on artificial intelligence, it successively makes use of an inductive inference method to build decisions ...