电流瞬时值控制的逆变器并联系统  

Parallel multi-inverter with instantaneous current-sharing control scheme

作　　者：吕晓东[1] 李武华[1] 吴建德[1] 何湘宁[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2009年第1期153-158,共6页Journal of Zhejiang University：Engineering Science

基　　金：浙江省科技计划资助项目(2007C21005);教育部博士点基金资助项目(20050335059)

摘　　要：对采用最大电流控制法、平均电流控制法、3C电流控制法和加权电流控制法等电流瞬时值均流控制的逆变器并联系统进行统一建模,提出了一种统一的小信号模型.利用该模型,可以很方便地分析系统在电路参数一致和不一致情况下的均流环稳定性问题.对多台并联系统的阻抗匹配特性问题进行了研究和探讨,讨论了均流环控制参数和并联逆变器台数对并联系统均流性能的影响.通过对两台220 V输出、单台最大输出功率为1 kW的逆变器并联系统进行实验,验证了理论分析的正确性.A general small-signal model was proposed to generate multi-inverter parallel system with instantaneous current-sharing control schemes, including maximum-current-control solution, average-current-control solution, circular-chain-control （3C） solution and weight-current-control solution. Then the current-sharing loop stability with identical and non-identical parameters can be analyzed easily. The impedance characteristics of the multi-inverter parallel system were studied. The effect of the current-sharing controller parameters and the number of inverters was investigated. Experimental results of two-inverter parallel system with 220 V output and 1 kW load verified the effectiveness of the model.

关 键 词：逆变器并联系统 电流瞬时值均流控制 小信号模型 

分 类 号：TM991.4[电气工程—电力电子与电力传动]