Experimental implementation of a Doubly Fed Induction Generator used for Voltage Regulation at a remote location

This paper presents the experimental implementation of a Doubly Fed Induction Generator (DFIG) for variable speed Wind Energy Conversion Systems (WECS) for improving the voltage profile at a remote location. Voltage control is becoming more challenging due to increase in wind energy penetration. This voltage control problem is addressed by controlling both the voltage source converters (VSCs) of DFIG. Control algorithms of both the VSCs are presented in this paper. The prototype of the DFIG is developed in the laboratory using a Digital Signal Processor (DSP). This developed DFIG based WECS is tested for both Unity Power Factor (UPF) and Voltage Regulation (VR) modes as well. This developed DFIG based WECS is tested for both steady state condition and dynamic changes in wind speeds in UPF and VR modes. This developed WECS is tested in sub-synchronous and super-synchronous speed regions and test results are presented to demonstrate its satisfactory performance.