基于瞬时功率均分的中频逆变器主从并联控制系统研究  

Research on Master-slave Parallel Control System of Mid-frequency Inverters Based on Instantaneous Power Sharing

作　　者：刘芳[1] 周建建 檀贵友 刘世权 吴梓群 LIU Fang;ZHOU Jianjian;TAN Guiyou;LIU Shiquan;WU Ziqun(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;Sungrow Power Supply Co.,Ltd,Hefei 230088,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]阳光电源股份有限公司,合肥230088

出　　处：《电源学报》2020年第6期33-41,共9页Journal of Power Supply

基　　金：国家重点研发计划(大规模风/光互补制氢关键技术研究及示范)资助项目(2018YFB1503100)。

摘　　要：为了满足中频交流供电电源大容量、高可靠性的需求,提出了一种基于瞬时功率均分的逆变器并联主从控制方案。首先,基于三相T型三电平中频并联拓扑搭建单机大容量中频逆变器,采用改进型LCL拓扑抑制系统高频环流、共模电压,并提出瞬时功率均分主从控制策略,实时均分主/从机有功、无功功率减小系统环流;其次,分析并建立了一套完整、可靠的通信系统,以实现功率信息和载波同步信号的稳定、快速传输从而实现主从并联控制;最后,通过Matlab/Simulink对所提方案进行了仿真分析,并搭建125 kW双机并联实验平台,验证该控制系统的可行性。To meet the large-capacity and high-reliability requirements of a mid-frequency AC power supply,a master-slave parallel control scheme for inverters based on instantaneous power sharing is proposed in this paper.First,based on the parallel topology of a three-phase three-level T-type mid-frequency parallel inverter,a single-machine large-capacity mid-frequency inverter is built,and the improved LCL topology is used to suppress the high-frequency circulating current and common-mode voltage of the system.In addition,an instantaneous power sharing master-slave control strategy is put forward to divide the active power and reactive power equally in real time and reduce the system’s circulating current.Second,a complete and reliable communication system is analyzed and established to realize the stable and fast transmission of power information and carrier synchronization signal so as to realize the master-slave parallel control.Finally,the proposed scheme was simulated and analyzed by Matlab/Simulink,and a 125 kW dual-machine parallel experimental platform was constructed to verify the feasibility of the control system.

关 键 词：中频逆变 瞬时功率均分 主从控制 有功、无功功率 

分 类 号：TM46[电气工程—电器] TM403.1