Full Capability of Harmonic Current Mitigation for a Wind Energy System

Abstract

—In this article, a novel control strategy is proposed to exploit the full capability, in terms of active filtering, of a wind energy conversion system based on a doubly fed induction generator. To achieve control of the wind energy conversion system, the rotor of the doubly fed induction generator is connected to the grid through a back-to-back pulse-width modulation converter. The proposed algorithm is applied to the rotor-side converter to ensure simultaneous active power production and power quality improvement. Depending on the nominal rotor-side converter power, the control strategy manages the wind energy conversion system function priorities between active power production, reactive power compensation, and current active–selective filtering without any system overrating. This study's main goal is to exploit the full capability of the rotor-side converter in terms of active and selective filtering. In fact, it is proposed to eliminate the whole harmonic currents if possible, or to compensate the fifth and the seventh predominant components and a part of the rest of the harmonic currents. Otherwise, one may filter a part of these two predominant harmonics in such a way that the rotor-side converter operates at its full capacitance. Simulation results demonstrate the effectiveness of the proposed strategy.

Keywords:

• wind energy system
• variable-speed wind turbine
• doubly fed induction generator
• AC-DC-AC pulse-width modulation converter
• selective harmonics compensation
• active filtering
• reactive power compensation
• maximum power point tracking
• field-oriented control
• full capability operation

Additional information

Notes on contributors

Mohamed Boutoubat

Mohamed Boutoubat was born in Chlef, Algeria, in 1964. He received his engineer degree in electronics from University of Technology, Algiers, Algeria, in 1988. He obtained his Ph.D. in electrical engineering in 2013 from Laghouat University, Algeria. In 1993, he joined the Electrical Engineering Department of Laghouat University as an assistant lecturer. Since October 2013, he has been a lecturer in the same department. He is a member of the LACoSERE Laboratory, Laghouat University, Algeria. His research interests include wind energy systems control, power quality, integration and dynamic interaction with grid, and wind farms.

Lakhdar Mokrani

Lakhdar Mokrani was born in Batna, in 1970. He obtained his engineer degree and Ph.D. in electrical engineering, in 1994 and 2005, respectively, from Batna University, Algeria. In 1997, he joined the Electrical Engineering Department of Laghouat University, Algeria, as an assistant lecturer. Since 2005, he has been a lecturer in the same department; in 2012, he became a professor in the same department. He is the responsible for the Control and Energy Management of Electrical Systems Research Group of the LACoSERE Laboratory, Laghouat University, Algeria. His main research area includes modeling and CAD of electrical machines, electrical drives control, and renewable energy systems control and management.

Mohamed Machmoum

Mohamed Machmoum was born in Casablanca, Morocco, in 1961. He received his diplo. engineering from the Institut Supérieur Industriel of Liège, Belgium, in 1984, and his Ph.D. from the Institut National Polytechnique of Lorraine (INPL), France, in 1989, both in electrical engineering. In 1991, he joined L’Ecole Polytechnique de l’Université de Nantes as a maître de conférence. Since September 2005, he has been a professor with Ecole Polytechnique de l’Université de Nantes and is responsible for the Power Quality and Renewable Energy Group. He is the head of IREENA Laboratory in Saint-Nazaire. His main research areas include power electronics, power quality, wind or tidal energy conversion systems, and power line communication.