PERFORMANCE COMPARISON OF FIVE LEVEL INVERTER WITH PERTURB AND OBSERVE MPPT AND INCREMENTAL CONDUCTANCE MPPT ALGORITHM

Abstract

This seminar report focuses on the performance comparison of a single-phase multi string five level photovoltaic inverter topology with a novel Sinusoidal Pulse Width Modulated(SPWM) control scheme employing perturb and observe Maximum Power Point Tracking (MPPT) algorithm and incremental conductance MPPT algorithm. The new SPWM is implemented with two reference signals that were identical to each other with an offset that was equivalent to the amplitude of the triangular carrier signal were used to generate PWM signals for the inverter switches. The performance comparison of proposed system is verified through MATLAB/SIMULINK environ- ment. The total harmonic distortion (THD) of inverter is reduced from 39% to 28% and operates at better power factor under rapidly changing atmospheric condition with incremental conductance MPPT algorithm compared to perturb and observe MPPT method.