郑州大学学报（工学版）2024，Vol.45Issue(2)：97-105,9.DOI:10.13705/j.issn.1671-6833.2023.05.016
用于新能源发电的新型升降压转换器及其控制策略
A Novel Buck-boost Converter and Its Control Strategy for New Energy Power Generation
摘要
Abstract
To solve the problem that the output voltage of the new energy power generation device varied greatly and it was difficult to realize energy storage,a novel single-switch coupled buck-boost converter based on PI controller and feed-forward control was presented.The voltage gain could be adjusted by the turns ratio of the coupled induc-tor,and the voltage stress on the power switch was suppressed by the passive clamped circuit with recycled leakage inductor energy.Compared with traditional buck-boost converter,the proposed converter had the advantages of wi-der voltage conversion ratio,continuous input current,and low voltage stress on power switch.Combing PI control-ler with feedforward control strategy,superior input transient response of the converter during the whole input volt-age range is obtained.The operating principles and steady-state characteristics of proposed converter were analyzed and derived in detail,respectively,and the performances were compared with other single-tube buck-boost convert-ers.The small-signal model was derived,and the correctness of PI parameter design was verified by bode diagram.The design process of PI controller combined with feedforward control strategy was analyzed.Finally,an experi-mental prototype with a rated power of 100 W,20 V to 60 V input,and 48 V output was built to verify the perform-ance of the proposed converter in boost mode and buck mode,and the feasibility of PI controller combined with feed-forward control strategy.The measured maximum efficiencies with the boost and buck modes were 97.08%and 97.10%,respectively.关键词
耦合电感/升降压转换器/小信号模型/PI控制器/前馈控制Key words
coupled inductor/buck-boost converter/small signal model/PI controller/feedforward control分类
信息技术与安全科学引用本文复制引用
罗朋,陈光浩,杨东红,郭磊..用于新能源发电的新型升降压转换器及其控制策略[J].郑州大学学报（工学版）,2024,45(2):97-105,9.基金项目
国家自然科学基金资助项目(62272109) （62272109）
