HIGH GAIN DC DC CONVERTER INTEGRATING INDUCTOR AND SWITCHED CAPACITOR

The voltage gain of Conventional boost converter is limited due to the high current ripple, high voltage stress across active switch and diode, and low efficiency associated with large duty ratio operation. High voltage gain is required in applications, such as the renewable energy power systems with low input voltage. A high step-up voltage gain active-network converter with switched capacitor technique is proposed in this project. The proposed converter can achieve high voltage gain without extremely high duty ratio. In addition, the voltage stress of the active switches and output diodes is low. Therefore, low voltage components can be adopted to reduce the conduction loss and cost. The operating principle and steady-state analysis are discussed in detail. Based on the concept of switched-inductor and switched- capacitor, this project proposes a novel switched-capacitor-based active-network converter (SC-ANC) for high step-up con- version, which has the following advantages: high voltage- conversion ratio, low voltage stress across switches and diodes, and self-voltage balancing across the output capacitors.