A Novel SRF Based UPFC in Grid Connected Wind and Solar Hybrid System

Abstract

Renewable energy penetration into existing grid system has introduced various power quality problems in the power system. To address this issue, a novel synchronous reference frame based unified power flow controller is proposed for a hybrid power system consisting of wind and solar PV generator integrated with the grid. Wind energy conversion system is designed with constant speed asynchronous generator with pitch angle control and solar PV array is modeled mathematically. Synchronous reference frame technique using d-q theory is used to generate control signals for shunt and series converters of UPFC. The hybrid system consisting of wind, solar and grid, is tested in simulation environment, subject to voltage sag and swell conditions by sudden disruption in load. The results prove the efficiency of the proposed UPFC controller in mitigating voltage sag, swell, reactive power compensation and harmonic reduction.