Indian Journal of Science and Technology
Year: 2023, Volume: 16, Issue: 27, Pages: 2068-2075
Md Aftab Alam1, S V A V Prasad1, Mohammed Asim2*
1Electronics and Communication Engineering Department, Lingayas Vidyapeeth, Faridabad, 121002, India
2Department of Electrical Engineering, Integral University, Lucknow, India
Email: [email protected]
Received Date:04 May 2023, Accepted Date:20 June 2023, Published Date:17 July 2023
Objectives: A leakage current issue that was mitigated by isolation transformers in a grid-connected photovoltaic system must now be addressed by the converters themselves. The paper presents the H6 inverter topology that solved the leakage current problem at the same time as maintaining a high efficiency and a low total harmonic distortion [THD]. Methods: Inverter topology H6 has been designed to reduce leakage current. A comparison of performance has been done using MATLAB/SIMULINK software. Efficiency, leakage currents, and common modes voltage are the primary parameters for analysis. Simulations of H4, H5 and H6 topologies will be carried out and results will be compared. Findings: H6 topology suppresses leakage current to a fairly acceptable magnitude when compared to other topologies. A comparison was made between the H6 and the traditional H4 and H5 topology and the leakage current in the H6 topology is 42.47mA as opposed to 46.87mA in H5 and 803.10mA in H4. Novelty: SPWM modulation and the H6 inverter topology are presented in the study. Using an H5 topology with an additional switch, an H6 inverter is designed. Direct current in one of the active modes of the H6 topology, fewer switches are required to make current flow, which reduces conduction losses. By maintaining a constant common mode voltage, an H6 inverter eliminates leakage currents. Thus, transformerless grid-connected photovoltaic systems with H6 inverters reduce conduction losses and leakage currents. The simulation results are provided as a means of verifying the topology. The leakage current has been found to be reduced to 42.47mA.
Keywords: Transformerless-Inverter; PV System; Leakage Current; H4; H5; And H6 Inverter
© 2023 Alam et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)
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