Voltage and frequency control of asynchronous generator for stand-alone wind power generation

A synchronous detection-based control algorithm for voltage and frequency control (VFC) of an isolated asynchronous generator (IAG) is proposed for a stand-alone wind energy conversion system (SWECS). A three-legged voltage source converter (VSC) with an isolated star/polygon transformer is used as an integrated VSC. The integrated VSC with a battery energy storage system is used to control the active and reactive powers of the SWECS. The SWECS is modelled and simulated in the MATLAB using the Simulink and the sim power system toolboxes. Test results on the developed prototype of SWECS are also presented to validate the control algorithm. The proposed VFC functions as a voltage and frequency regulator, a load leveller, a load balancer and a harmonics filter in the SWECS.