A DPQC Control Scheme for Power Quality Improvement in a Grid Connected Wind Energy System

Injection of the wind power in to an electric grid affects the power quality. The power wind energy source varies due to environmental conditions. Due to the fluctuation nature of the wind power injection in to an electric grid affects the power quality. The influence of the wind turbine in the grid system concerning the power quality measurements are the active power, reactive power, variation of voltage, flicker, harmonics and electrical behavior in switching operation. The power quality problems when wind turbine installed to grid side is demonstrated here. A Distributed power quality controller (DPQC) is connected at a point of common coupling with a battery energy storage system to rectify the power quality problems. The battery energy storage used to maintain constant real power from varying wind power. The generated power can be stored in the batteries at low power demand hours. The combination of battery storage with wind energy generation system will synthesize the output wave form by absorbing (or) injecting reactive power and enable the real power flow required by the load. The DPQC control scheme for power quality improvement is simulated using MAT LAB/SIMULINK in power system block set. The effectiveness of the proposed scheme relives the main supply source from the main supply source from the reactive power demand of the load and the induction generator.