Bidirectional Interleaved DC-DC Converter for Supercapacitor Energy Storage Integration with Reduced Capacitance

This paper analyzes the control method of a multiphase interleaved DC-DC converter for supercapacitor energy storage system integration in a DC bus with reduced input and output filter size. A reduction in filter size is achieved by operating only in modes with duty cycles that correspond to smaller output current ripples. This leads to limited control of the charging and discharging process of the supercapacitor energy storage system. Therefore, a detailed analysis of the optimal charging strategy is provided in this paper for interleaved converters with different numbers of phases. The results show that such control can be used, albeit with some percentage loss in efficiency. Experimental results are presented in this paper to verify the theoretical results.

Automated summary

This paper analyzes the control method of a multiphase interleaved DC-DC converter for integrating a supercapacitor energy storage system into a DC bus with reduced input and output filter size. By operating in modes with smaller output current ripples, the size of the filters can be reduced. However, this leads to limited control of the charging and discharging process of the supercapacitor energy storage system. The paper provides a detailed analysis of the optimal charging strategy for interleaved converters with different numbers of phases and presents experimental results to verify the theoretical findings.