Frequency Control of Wind Power Plant Assisted Hybrid Power System

Abstract

The addition of wind power plants (WPPs) into the mainland system is rising continuously since its large availability and eco-friendly nature. However, WPP works at maximum power point, and hence, WPP may not help in frequency regulation. Therefore, in this paper, frequency control techniques are introduced on WPP for the improvement of primary frequency regulation. This may be realized by creating a reserve power margin using pitch angle control and overspeed operations. The reserve power margin depends on wind velocity and blade pitch angle. The frequency support from deloaded WPP (WPP operates at reduced power point instead of maximum power point) may control based on the droop value, which depends on the available reserve and frequency deviation. From the MATLAB simulation results analysis, the effect of droop action is investigated in terms of minimizing the frequency deviation and smoothening power fluctuations of WPP.