一種并聯逆變器瞬時電流控制策略 

馬翔宇, 肖黎明 
(華中科技大學 電氣與電子工程學院，湖北 武漢 430074) 
 

摘 要： 高效的負載電流分配和環流抑制策略是逆變器并聯運行的關鍵，提出了一種基于環流前饋的瞬時電流控制策略。通過建立PID 閉環控制逆變器數學模型，對輸出等效阻抗進行分析，引入瞬時環流前饋控制策略，利用配置虛擬環流阻抗以達到負載均分和抑制環流的目的。Matlab/Simulink仿真證明了該策略的正確性，該方案易于實現，便于進行數字化控制。
關鍵詞： 并聯逆變器；環流前饋；虛擬環流阻抗
中圖分類號：TM464 文獻標識碼：A 文章編號：1007-3175(2014)07-0020-04

An Instantaneous Current-Sharing Control Strategy for Parallel-Connected Inverters 

MA Xiang-yu, XIAO Li-ming 
（School of Electrical and Electronic Engineering, Huazhong University of Science & Technology, Wuhan 430074, China） 
 

Abstract: High efficiency load-current sharing control and circulating current retraining strategy is the key of inverters parallel operation. This paper proposed an instantaneous current-sharing control strategy based on the circulating current feed-forward. Via the establishment of the inverter mathematical model controlled by loop-closed PID, analysis was made to the equivalent output impedances. The instantaneous circulating current feed-forward control strategy was introduced and the configuration of virtual circulating current impedances was used to achieve the goal of load-current sharing and circulating current retraining. Simulink simulation in Matlab verifies that this strategy is correct, convenient for the implement of digital control.
       Key words: parallel-connected inverters; circulating current feed-forward; virtual circulating current impedance

參考文獻
[1] 段善旭.分布式逆變電源的模塊化及并聯技術[M].北京：電子工業出版社，2013：5-18.
[2] 于瑋.UPS并聯系統若干關鍵問題研究[D].杭州：浙江大學，2009.
[3] Chen J F, Chu C L, Huang C L.The parallel operation of two UPS by the coupled -inductor method[C]//Proceedings of the IEEE International Symposium on Industrial Electronics, 1992，2：733-736.
[4] Tan Jingtao, Lin Hua, Zhang Jun, et al.A novel load sharing control technique for paralleled inverters[C]//IEEE PESC, Acapulco, Mexico, 2003.
[5] 肖嵐，陳良亮，李睿，等.基于有功和無功環流控制的DC-AC逆變器并聯系統分析與實現[J].電工技術學報，2005，20(10)：11-16.
[6] 林新春，段善旭，康勇，等.基于下垂特性控制的無互聯線并聯UPS建模與穩定性分析[J].中國電機工程學報，2004，24(2)：34-39.
[7] Tuladhar A, Jin H, Unger T, et al. Control of parallel inverters in distributed AC power systems with consideration of line impedance effect[J].IEEE Transactions on Industry Applications, 2000, 36(1)：131-138.
[8] Chandorkar M C, Divan D M Adapa R. Control of parallel connected inverters in standalone AC supply systems[J].IEEE Transactions on Industry Applications, 1993, 29(1)：136-143.
[9] 彭力.基于狀態空間理論的PWM逆變電源控制技術研究[D].武漢：華中科技大學，2004.
[10] 張宇，余蜜，劉方銳，等. 模塊化UPS 采用虛擬阻抗的瞬時均流控制方法[J]. 中國電機工程學報，2012，32(21)：8-14.