Email this article Boost Interleaved Converter Integrated Voltage Multiplier Module for Renewable Energy System
Abstract
This document presents a high step-up converter, which is apt for renewable energy system. Through a voltage multiplier unit composed of switched capacitors and coupled inductors, a conventional interleaved boost converter obtains high step-up gain without operating at extreme duty ratio. The design of the proposed converter 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 source. In addition, due to the lossless passive clamp performance, leakage energy is recycled to the output terminal. Hence, large voltage spikes across the main switches are alleviated, and the efficiency is improved. Even the low voltage stress makes the low-voltage-rated MOSFETs be adopted for reductions of conduction losses and cost. Finally, the prototype circuit with 40-V input voltage, 380-V output, and 1000-W output power is operated to verify its performance. The highest efficiency is 97.1%.
Index Terms - Voltage multiplier module. Boost–flyback converter, high step-up, photovoltaic (PV) system.
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