Improvement of Power Quality by Realising Renewable Energy based Cascaded Five Level Control Power Conditioner

Abstract

Renewable Energy Sources(RES) are best alternative to conventional energy source. This paper presents a Renewable energy based Shunt Active Filter circuit in conjunction with Proportional Integral (PI) and Fuzzy Logic Controller (FLC) for the power-quality improvement. In today's world the loads are highly become electronic based which produce more harmonics and EMI. The main aim of this research work is to reduce current harmonics and reactive power compensation due to the non-linear loads. This paper studies an investigation of Cascaded Five-Level Inverter (CFLI) based SAF in PS. By using CFLI the harmonics distortion can be minimized and switching losses can also be minimized as it uses minimum number of switches. Sub-Harmonics Pulse Width Modulation (SHPWM) technique with Proportional and Integral (PI) controller and D-Q reference frame theory are proposed in this paper for reactive power compensation, reducing harmonic distortion and maintaining DC capacitor voltage. The Sub-Harmonic Pulse width modulation is used for switching the switches of CFLI. The reference compensating currents for SAF are calculated by using D-Q reference frame theory and PI controller is used for capacitors dc voltage regulation for SAF. The controls are made by controlling the RES voltage level for the whole system. The results are validated through MATLAB/Simulink simulation software and TMS320F2407 DSP with SAF and without SAF.