A Transformerless Single-phase Symmetrical Z- source Soft Switching Heric Inverter with Reduced Leakage Currents

A. Balamurugan and V.K. Ilyaraja

This method is proposed by a single phase Z-source soft-switching inverter with low leakage current and no transformer. It aims to use an effective and useful inverter concept and (Z-source) network to maintain standard low leakage current in photovoltaic applications. The proposed soft switching technology effectively eliminates the high frequency components used in the common mode power supply, thereby solving the problem of inverter leakage current. Such systems usually use boost DC/DC converters, and their performance is relatively poor, especially when the PV voltage is low. The solution to this problem is to modify the modulation mechanism or switching mode to mitigate the change in common mode voltage. Please explain the proposed inverter operation strategy and control mechanism. Symmetric Z-source soft-switching inverters require active switching. However, the operating frequency of the switch is the line frequency, so the losses are negligible.

Volume 12 | Issue 5

Pages: 267-273

DOI: 10.5373/JARDCS/V12I5/20201713