On the Stabilization and Stability Domain Estimation of VSC-HVDC Transmission Systems

Abstract

Control of Voltage Source Converters (VSC)-based HVDC (High Voltage Direct Current) transmission systems is developed in this paper. The proposed approach aims at stabilizing the power VSC, which is characterized by nonlinearities due to requirements of power flow and DC bus voltage. The steady-state average model for the VSC-HVDC system is developed on linear and bilinear deviation state–space models around the working point. Based on poles placement and Least Squares (LS) methods, linear and nonlinear polynomial feedbacks are considered. The proposed approach leads to regulate simultaneously the dq grid currents and the DC bus voltage. By upon the time domain simulations in MATLAB/SIMULINK/SPS environment, the effectiveness of the proposed control strategies is tested on a VSC and a point-to-point VSC-HVDC transmission system. The simulation results show the robustness of the studied systems under various conditions.

KEYWORDS:

• High Voltage Direct Current (HVDC)
• Least squares method
• Nonlinear polynomial controller
• Polynomial modelling approach
• Power grids
• Voltage Source Converter (VSC)

Additional information

Notes on contributors

M. Ayari

Mohamed Ayari received his master's degree in automatic and industrial informatics from Ecole Supérieure des Sciences et Techniques de Tunis (ESSTT), University of Tunis, Tunisia, in 2012. He is a member in Advanced Systems Laboratory (LSA) at Tunisia Polytechnic School (EPT), University of Carthage, Tunisia. In 2017, he received the PhD degree in electrical engineering from Ecole Nationale Supérieure d’Ingénieurs de Tunis (ENSIT), University of Tunis, Tunisia. His main research interests concern the modelling, analysis, and control issues based on the integration of high voltage power electronic converters, like voltage source converter (VSC) and modular multilevel converter (MMC), in high voltage direct current (HVDC) and multi-terminal direct current (MTDC) transmission systems. Corresponding author. Email: [email protected]

M. M. Belhaouane

MohamedMoez Belhaouane received the master's degree in automatic control and the PhD degree in electrical engineering from Ecole Supérieure des Sciences et Techniques de Tunis and Polytechnic School of Tunisia in 2005 and 2011, respectively. He is currently a senior research engineer in L2EP Laboratory (Laboratoire d’Electrotechnique et d’Electronique de Puissance) at Ecole Centrale de Lille, France. Prior to joining the Electric Grid Research Team at L2EP Laboratory, he was an associate professor in Ecole Nationale Supérieure d’Ingénieurs de Tunis (ENSIT). Earlier, he was also an assistant professor in Ecole Nationale d’Ingénieurs de Gabès. His main research interests concern the modelling, analysis, and control issues based on the integration of high voltage power electronic converters, like VSC and MMC, in HVDC and MTDC transmission systems. In addition, his research advances include also the implementation of advanced control strategies using HIL (Hardware In the Loop) and PHIL (Power Hardware In the Loop) concepts based on small-scale multi-terminal DC mock-up. Finally, his research and development (R&D) works are mainly related to the French's TSO, RTE (Réseau de Transport d’Electricité). Email: [email protected]

N. Benhadj Braiek

Naceur Benhadj Braiek was born in Mahdia, Tunisia. He obtained the bachelor's degree in electrical engineering, and the master degree in systems analysis and signal processing, both from National High School of Engineers of Tunis in 1987, and the doctorate degree (PhD) in automatic control from the University of Sciences and Technologies of Lille-France in 1990, and the State Doctorate of Sciences (Doctorat d’Etat ès Sciences) in electrical engineering from the National High School of Engineers of Tunis – University of Tunis – in 1995. He is professor of automatic control and electrical engineering, and the head of Research Laboratory “Laboratory of Advanced Systems” at the Ecole Polytechnique de Tunisie – University of Carthage. His domain of interest includes nonlinear systems modelling, control and optimization in both theoretical developments and applications. He has published more than 250 scientific papers in international journals and conferences and supervised more than 80 master thesis and 35 PhD thesis which have been successfully defended. He is the member of the board of the National Committee for Evaluation of Research Results. Email: [email protected]

X. Guillaud

Xavier Guillaud has been professor in L2EP – Lille – France since 2002. First, he worked on the modelling and control of power electronic systems. Then, he studied the integration of distributed generation and especially renewable energy in power systems. Nowadays, he is studying the high voltage power electronic converters in transmission system. He is leading the development of an experimental facility composed of actual power electronic converters interacting with virtual grids modelled in real-time simulator. He is involved on several projects about power electronic on the grid within European projects and different projects with French companies. E mail: [email protected]