Abstract: Solar inverters which are transformer less possess high efficiency when compared to that of an isolation link. A major issue with this is the leakage current issue. In this paper we propose a single phase with six switch transformer less inverter topologies along with an ac bypass circuit. With the help of these circuits the two unidirectional freewheeling current units are embedded in the midpoint of a full bridge inverter. This is done to attain a freewheeling current path, to separate the solar panels from the grid in the freewheeling state. The advantage of freewheeling is that it consists of very few devices and avoids the poor performance body diodes which lead to higher efficiency. It is also not required to add a voltage balancing control system as that of a half bridge inverter. In this paper, simulations are also added in order to validate the proposed topologies.
Keywords: Solar panel, Single phase six-switch transformerless inverter, Leakage current, Grid connected inverter.
Title: Transformer less Grid Connected Inverter with Leakage Current Elimination
Author: SOWMIYA.N, JANAKI.N
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
Research Publish Journals
