Design of an Extendable High Boost Multi-Port Z-Network Converter for Small Power Grid-Connected PV Applications

Abstract:
This project presents a topology that is called Multi-Port Z-Network Converter (MPZNC). A grid-connected inverter can include N input sources into a single DC bus using the suggested topology. Bypassing the input and output circuits was another capability it possessed with the boost function. Compared to traditional converters, these one-use fewer parts to integrate various energy sources. Consequently, it has better circuit properties and achieves higher conversion efficiencies. In comparison to the standard Z-Source Converter (ZSC), it improves the input-output voltage transformation ratio and provides a wider voltage control range. The circuit design, operating principle, control mechanism, and simulation data have been presented to prove technically possible. To investigate the suggested MPZNC-fed Single Phase Five Level (SPFL) inverter in the given scenario, a 1.5 kW, 230 V, 50 Hz miniature laboratory study model was created. According to the findings, the suggested converter has an efficiency of around 93% and provides double the amount of boosting time as the standard ZSC converter. The simulation results can be evaluated by using Matlab/Simulink Software.

Keywords: DC-DC converter, grid-connected connected PV system, high boost isolated converter, multi-port Z-Netwok converter (MPZNC), photovoltaic system, single phase five level (SPFL) inverter