Peak load sharing based on blade pitch control of wind turbine in the presence of utility supply

Abstract

The alternate energy resources are replacing conventional energy sources for electricity production because of tremendously increasing environmental pollution and cost of fossil fuels. Wind power is one of the potential alternate energy resources and is being deployed actively. Wind power generation system comprises of wind turbine and electrical generator as essential parts interconnected through gear box. The conventional wind turbines are designed with adjustable blade pitch to regulate shaft speed of turbine or to withstand against heavy wind blows. In this paper, a technique for peak load sharing in the presence of utility supply using Pitch Frequency Control (PFC) is proposed for wind turbines. This technique has been simulated in MATLAB environment using Simulink. The simulation results show that PFC finds its applications with wind energy system having low speed axial flux synchronous generator as well as with the wind energy system with small gear ratio. This particular proposed PFC based control presents a cost effective technique for efficient peak load sharing and wind energy system free of power electronic converters.