Mitigation of reactive power requirements of large scale wind power generation in Western Rajasthan using Static Var Compensator

Abstract

Shunt capacitor banks are installed by developers pooling stations for management of reactive power for a wind farm. Operation of shunt capacitor banks is manually and accordingly there is a wide variation in wind power plant power factor of 0.9 lagging to 0.9 leading. Due to large variations in wind generation power factor, reactive power flows on transmission lines are also variable and accordingly there is a wide variation in power transmission system voltage from minimum 0.8 p.u. to a maximum of 1.20 p.u. Due to low & high power system voltages, transmission lines are tripped resulting constrained in a wind power evacuation. Considering the high penetration of wind power in the system, in this paper, Static Var Compensator (SVC) is proposed at 400kV GSS Jaisalmerfor large scale wind power penetrated power system, for mitigation of wind power generators reactive power. Simulation studies have been carried out to validate the effectiveness of the SVC for voltage control with the variation in wind power generation power factor. Case studies are carried out in 19-bus system in Western Rajasthan area where wind power penetration is even more than 2000MW to demonstrate the performance of the SVC taking the consolidated effect of voltage behavior with and without SVC at a different power factor. Wind power, penetrated part of Rajasthan power system has been modeled using Mi.-Power system analysis software. Results of tests conducted on the model system in various possible field conditions are presented and discussed.