电力系统及其自动化学报2024，Vol.36Issue(4)：19-29,11.DOI:10.19635/j.cnki.csu-epsa.001318
基于SEPIC的新型高增益DC-DC变换器及衍生拓扑分析
Analysis of Novel High-gain DC-DC Converter Based on SEPIC and Derived Topologies
摘要
Abstract
In response to the problems of low voltage gain and high voltage stress in semiconductor devices existing in single-switch Boost converters utilized in grid-connected photovoltaic systems,such as a single ended primary inductor converter(SEPIC),Boost,quasi-Z-source,and second-order converters,an external Boost high-gain DC-DC convert-er based on the SEPIC topology is proposed.First,a detailed analysis of the working principle and steady-state charac-teristics of the proposed converter is conducted in both the continuous and discontinuous conduction modes of inductor current,and its performance is compared with those of other emerging topologies.On this basis,the derived topologies based on the external Boost network are given.Finally,the theoretical analysis is validated through the construction of a 400 V/200 W prototype.The proposed converter utilizes an external Boost network composed of impedance network and switched capacitor units to step up the voltage gain of the SEPIC converter while remedying the drawbacks associated with the high voltage stress in semiconductor devices.关键词
DC-DC变换器/单端初级电感变换器/高增益/低电压应力/非隔离Key words
DC-DC converter/single ended primary inductor converter(SEPIC)/high-gain/low voltage stress/non-isolated分类
信息技术与安全科学引用本文复制引用
魏业文,李明,李俊波,宁鑫淼,白文静..基于SEPIC的新型高增益DC-DC变换器及衍生拓扑分析[J].电力系统及其自动化学报,2024,36(4):19-29,11.基金项目
国家自然科学基金青年基金资助项目(52107108) （52107108）
智慧能源技术湖北省工程研究中心开放课题(2020ZHLY06) （2020ZHLY06）
