Study of H6 Transformerless Full Bridge PV-Grid Tied Inverters

Journal: GRENZE International Journal of Engineering and Technology
Authors: Shilpa Krishnan, Surumi Hassainar
Volume: 3 Issue: 2Special Issue
Grenze ID: 01.GIJET.3.2Special Issue Pages: 108-113

Abstract

Inverters with transformers of conventional type, connected in PV grid-tied generation systems have now being replaced by transformer less inverters due to various reasons such as reduction in size, weight and cost, improvement in efficiency etc. Transformer less inverters causes a number of technical challenges in grid-connected PV systems, among which flow of leakage currents is a major problem. This leakage currents that flows between the parasitic capacitance of PV array and the grid has to be eliminated, which otherwise leads to serious safety problems. This paper deals with an H6 transformer less full- bridge inverter topology with low leakage currents that can be used in PV grid – tied applications. A closed loop has been developed for maintaining the voltage constant at the grid side. Aforementioned transformer less topology is simulated that validates the effectiveness of the inverter.

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