Grid Connected Photovoltic System using High Gain DC-DC Converter with Voltage Multiplier Circuit

In this paper, a high step – up converter which is suitable for renewable energy system connected to grid is proposed. Conventional step – up converters required for grid application cannot achieve high step – up conversion with high efficiency because of the resistances of elements or leakage inductance. The proposed converter is a conventional interleaved boost converter with voltage multiplier module which not only reduces the current stress but also constrains the input current ripple which decreases the conduction losses and lengthens the lifetime of the input sources.