Abstract
Building a DC-DC converter with high step-up, low cost and high efficiency from low DC voltage is the requirement in many applications. It is achieved by employing a front end boost converter based full bridge inverter on bidirectional inverter. In conventional boost converter during device turn-off, voltage overshoot occurs across the semiconductor devices. So, an additional snubber or voltage clamping is required to limit the overshot voltage. It upturns the component’s count and losses making the converter less efficient. The above problem can be avoided by operate the converter with soft-switching method by using secondary modulation technique. Hence, it avoids the need of additional snubber or auxiliary circuit. Soft switching operation is proposed in the bidirectional inverter. Soft switching operation is achieved through the auxiliary circuit, which consist of two auxiliary switches, Front end converter and full bridge inverter. Bidirectional inverter allows current flow in both direction and therefore permits energy flow from the grid to storage when solar energy is not available. The theoretical analysis of the proposed converter is verified using simulation results.
Highlights
The conventional power generation method faces problems like depletion of fossil fuels and polluting the environment
The boost converter is the preferred choice in earlier days because of its high voltage gain and simple circuit structure
This paper is used as a reference for mitigating the switching losses by employing transformer based circuit topologies and frequently applying soft switching techniques including zero voltage switching (ZVS) or zero current switching (ZCS)
Summary
The conventional power generation method faces problems like depletion of fossil fuels and polluting the environment. The aim of this paper is to achieve soft switching (ZCS of primary side and ZVS of secondary side) of all semiconductor devices. The objective of this project is to provide an efficient DC-DC conversion in Residential solar power system. [2] .The development of a high efficiency bidirectional converter for power sources with great voltage diversity was focused. This paper is used as a reference for mitigating the switching losses by employing transformer based circuit topologies and frequently applying soft switching techniques including zero voltage switching (ZVS) or zero current switching (ZCS). The techniques of voltage clamping, synchronous rectification and soft switching are manipulated providing high efficiency bidirectional power conversion for power sources with large voltage diversity. The techniques of voltage clamping, synchronous rectification and soft switching are manipulated providing high efficiency bidirectional power conversion for power sources with large voltage diversity. [3]
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