Voltage profile improvement of a micro grid system using a DFIG based wind energy conversion system

Abstract

Recently micro grids are attracting attention of researchers due to the fact that they can serve as the best solution for the most alarming problems in power generation and distribution industry. Micro grids are capable of generating clean energy and supplying good quality power. In this work, a simple micro grid system is modeled and analyzed which consists of two diesel generators and a DFIG based wind energy conversion system (WECS). Loads are connected at different points of the system. The system is subjected to load change and turbine torque variation of the DFIG, which deteriorates the voltage profile of the micro grid system. By implementing a vector control strategy with reactive power compensation, on the grid side converter (GSC) the voltage profile of the system is improved. The rotor side converter (RSC) of the WECS is also controlled by stator flux oriented vector control strategy for the decoupling control of the active and reactive power of the DFIG. The whole system is modeled and simulated in Matlab/Simulink environment.