Modelling and Analysis of Magnetically Coupled Impedance Source Inverter for Solar Photovoltaic Systems

The renewable sources of energy are the trending energy source in the present scenario because of several advantages over the conventional energy sources. Mainly, the non-polluting nature of these sources has been a key factor for wide usage. Among these sources, solar energy has been most popular source used in the generation of electrical power for several applications. The solar photovoltaic system performance mainly depends on the converter and inverter used in the system. The conventional converter and inverters based solar PV system suffers with lower efficiency because of two stage conversion of power, low voltage gain and slow dynamic response. The magnetically coupled impedance source inverter (MCIS inverter or Y-source inverter) developed recently found to offer higher voltage gain and fast dynamic response. In the present work a Y-source inverter with simple boost control technique is modelled and analyzed for a solar PV system using MatLAB Simulink. The results are compared with that of Z-source inverter. It is observed that the voltage gain and output voltage of the Y-source based solar PV system is higher in comparison with Z-source inverter.