中国电机工程学报2017，Vol.37Issue(z1)：186-195,10.DOI:10.13334/j.0258-8013.pcsee.171800
具有低频功率解耦功能的直流变换系统及其控制策略研究
Researches on Control Strategy of DC-DC Conversion System With Low-frequency Power Decoupling Function
摘要
Abstract
For high-voltage DC converter in the high voltage DC transmission system, high voltage is one of its design difficulties, which generally uses multi-module string parallel combination structure to solve. While there will be low-frequency ripple in DC voltage when it converts to AC voltage via the single-phase inverter, thus affecting the power quality of the DC side. This paper researched low-frequency power decoupling control of ISOP (input series output parallel) system. The power decoupling was achieved by injecting the compensation current to offset the ripple current, which can suppress the low frequency ripple fluctuation of the DC side and significantly improve the system power quality. In order to realize the precise control of low frequency ripple, the multiple quasi-proportional resonance control was adopted in the decoupling system and the compensation of the DC side voltage fluctuation is achieved by tracking the harmonic currents of a particular frequency and providing relatively low impedance channels to release the harmonic current. Finally, the feasibility and superiority of the proposed scheme were verified by simulation.关键词
多模块串并联组合/低频功率解耦/补偿电流/比例谐振控制Key words
multi-module series and parallel combinations/low frequency power decoupling function/compensating current/PR control method分类
信息技术与安全科学引用本文复制引用
周芊帆,周奔,何志兴,易伟浪,闵俊,贺纤纤,王锋,罗安..具有低频功率解耦功能的直流变换系统及其控制策略研究[J].中国电机工程学报,2017,37(z1):186-195,10.基金项目
国家自然科学基金项目(51677063).Project Supported by National Nature Science Foundation of China(51677063). （51677063）
