双闭环控制电压源逆变器并联系统环流特性研究  

Research on the Circulating-Current Characteristics of Parallel System Based on Double Close-Loop Controlled Voltage Source Inverters

作　　者：陈良亮[1] 肖岚[1] 胡文斌[1] 严仰光[1] 

机构地区：[1]南京航空航天大学航空电源航空科技重点实验室,南京210016

出　　处：《电工技术学报》2004年第5期21-25,共5页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(50337030);中国航空科学基金资助项目(01F52032)

摘　　要：逆变器并联系统各模块输出电压的幅值和相位不一致会产生有功环流和无功环流。从逆变器等效输出阻抗的角度,对基于输出电压和滤波电感电流双闭环瞬时反馈控制技术的逆变器并联系统的环流特性进行了研究。理论分析、仿真和实验结果证明,对于双闭环控制电压源逆变器并联系统,各模块输出电压单位幅值差造成环流的大小取决于单模块逆变器等效输出阻抗的模值,环流的无功功率与有功功率的比值取决于等效输出阻抗角的正切值;各模块输出电压单位相位差造成环流的大小取决于单模块输出电压和等效输出阻抗的模值,环流的有功功率和无功功率的比值取决于等效输出阻抗角的正切值。The characteristics of circulating-current caused by the disparity of each module output voltage抯 amplitude and phase in parallel inverter system is well researched through the view of inverter抯 equivalent output impedance. Assuming Zi=Ri+jXi is the equivalent output impedance of double close-loop controlled voltage source inverter, theoretic analyses prove that in the parallel inverter system, the magnitude of circulating-current IH caused by unit amplitude difference is determined by the modulus │Zi│ of equivalent output impedance, the ratio of reactive power QH and active power PH is equal to tana, where a=atan(Xi/Ri); the magnitude of IH caused by unit phase difference is determined by the amplitude of output voltage and │Zi│, the ratio of PH and QH is equal to -tana. Simulation and experimental results proved the correction of theoretical analyses.

关 键 词：环流 等效输出阻抗 逆变器 并联 

分 类 号：TM461[电气工程—电器]