Title: Reactive power compensation of wind energy conversion system by using Unified Power Flow Controller

Authors: Nijaz Dizdarevic, Matislav Majstrovic, Goran Andersson

Addresses: Energy Institute Hrvoje Pozar, Savska 163, HR-10000 Zagreb, Croatia. ' Energy Institute Hrvoje Pozar, Savska 163, HR-10000 Zagreb, Croatia. ' EEH – Power Systems Laboratory, ETH-Zentrum, ETL G26, CH-8092 Zürich, Switzerland

Abstract: Voltage control and reactive power compensation in a distribution network with embedded Wind Energy Conversion System (WECS) represents the main concern of this paper. The WECS is a fixed speed/constant frequency system that is equipped with an induction generator driven by an unregulated wind turbine. The problem is viewed from short-term (10 seconds), mid-term (10 minutes) and long-term (48 hours) time domain responses of the system to different changes of wind speed and load daily cycles. Being disturbed by a variable wind speed, the WECS injects variable active and reactive power into the distribution network exposing nearby consumers to excessive voltage changes. In the FACTS-based solution approach, the Unified Power Flow Controller (UPFC) is used at the point of the WECS network connection to help solve technical issues related to voltage support and series reactive power flow control.

Keywords: wind energy conversion systems; WECS; FACTS; UPFC; unified power flow controllers; voltage control; reactive power compensation; reactive compensation; wind power; wind generators; voltage regulation.

DOI: 10.1504/IJETP.2005.007265

International Journal of Energy Technology and Policy, 2005 Vol.3 No.3, pp.269 - 298

Published online: 29 Jun 2005 *

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