Improved SRF Controller Based on DVR for Grid Connected Wind Energy System

Abstract

The production of wind generation has expanded considerably today. The main problem with wind generation system is to regulate the voltage at wind turbine terminals even under abnormal grid conditions. This is mainly as a result of consumption of non active power from the grid during grid disturbances. This paper presents an improved Synchronous Reference Frame control namely Dual Decouple Synchronous Reference Frame (DDSRF) control for Dynamic Voltage Restorer (DVR) to upgrade the dynamic response of wind energy system. The main objective of the proposed control strategy is to stabilize the voltage at the wind turbine terminals under symmetrical sag/swell and asymmetrical fault conditions. Simulation studies have been performed in MATLAB/SIMULINK to manifest the effectiveness of proposed control strategy. The superiority of the proposed control strategy over conventional SRF method is demonstrated under unbalanced conditions through MATLAB simulation results