Power Quality Improvement in Grid Connected Wind Energy System Using Facts Device and PID Controller

Abstract

The wind energy generation, utilization and its grid penetration in electrical grid are increasing worldwide. The wind generated power is always fluctuating due to its time varying nature and causing stability problems. This weak interconnection of wind generating source in the electrical network affects the power quality and reliability. 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 of switching operation and these are measured according to national international guidelines. The STATCOM provides reactive power support to wind generator and load. The Battery Energy Storage System (BESS) is generally required to compensate the fluctuation generated by wind turbine. The paper study demonstrates the power quality problem due to installation of wind turbine with the grid. The proposed control scheme to mitigate the power quality issues for power quality improvement in the grid connected wind energy generation is simulated using MATLAB/ SIMULINK in power system block set. The control scheme has a capability to cancel out the harmonic parts of the load current and maintains the source voltage and current in-phase. The proposed control scheme supports the reactive power demand for the wind generator and load at point of common coupling (PCC) in the grid system, thus it gives an opportunity to enhance the utilization factor of transmission line.