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.