Simulation, Analysis and Development of Pv Fed Quasi Impedance Source Inverter

In recent days, emphasis is laid on improving the efficiency and applicability of the inverters that are currently used in photovoltaic systems so that a pure sinusoidal waveform is obtained which can be directly used for a number of applications. This paper presents the design and development of a Quasi Impedance Source Inverter (QZSI) whose apex application is with the Photo voltaic power conditioning system. This paper analyzes the different existing modulation strategies and proposes a new modulation strategy to reduce the harmonics in the output. A comparative evaluation of the various control methods is presented in terms of Total Harmonic Distortion (THD), inductor current ripple, capacitor voltage ripple, voltage gain and voltage stress. Simulations of the circuit configuration of these control methods are performed in MATLAB/SIMULINK. Hardware prototype of the proposed three-phase quasi Z-source inverter for PV is built to validate the results.