Voltage and frequency control of isolated asynchronous generator with reduced switch integrated voltage source converter in isolated wind power generation

Abstract

This paper deals with the I.cos¿ algorithm for the voltage and frequency control (VFC) of an autonomous wind power generation using an isolated asynchronous generator (IAG) feeding three-phase four-wire loads. The reference source currents are estimated using the I.cos¿ algorithm to control the voltage and frequency of IAG system. Two-leg voltage source converter (VSC) with split capacitor and an isolated T-connected transformer is used as an integrated VSC. The reduced switch integrated VSC with a battery energy storage system (BESS) is used for the power management of the wind energy conversion system (WECS). The WECS is modeled and simulated in the MATLAB using the Simulink and the sim power system (SPS) toolboxes. Bi-directional power flow capabilities of the proposed voltage and frequency (VF) controller in WECS are demonstrated through simulation results. The proposed VF controller functions as a voltage regulator, a load leveler, a load balancer and a harmonic eliminator in the WECS.