改进的并联逆变器小信号稳定性分析方法  

Advanced Small-signal Model Method for Parallel Inverter

作　　者：李军 陈杰[1,2] 邱瑞昌 徐春梅 刘志刚 LI Jun;CHEN Jie;QIU Ruichang;XU Chunmei;LIU Zhigang(School of Electric Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing Rail Transit Electrical Engineering Technology Research Center,Beijing 100044,China)

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]北京市轨道交通电气工程技术研究中心,北京100044

出　　处：《铁道学报》2020年第2期34-40,共7页Journal of the China Railway Society

基　　金：中央高校基本科研业务费（2018JBZ004）

摘　　要：为了进一步对辅助并联系统稳定性进行分析,需建立一个涵盖并联逆变器各个控制参数的模型。然而采用传统方法建立的小信号模型所能分析的控制参数极为有限,为此本文提出了一种全新的并联逆变器小信号模型建立方法,通过这种方法建立的小信号模型除了能分析下垂参数对系统性能和稳定性的影响之外,还能分析逆变器输出阻抗、负载、功率计算方法、低通滤波器截止频率等各参数对系统性能和稳定性的影响。通过这种方法,对并联逆变器系统性能和稳定性进行了全面的分析。In order to analyze the stability of the auxiliary parallel system,a model which covers each control parameter of the parallel inverter should be established.However,the control parameters which can be analyzed by the small signal model established by the traditional method are extremely limited.To this end,this paper proposed a new parallel inverter small-signal modeling method.In addition to analyzing the influence of droop parameters on the system performance and stability,the small-signal model established by this method can also analyze the influence of output impedance of inverter,the load,the power calculation method and cut-off frequency of low-pass filter on the system performance and stability.By this method,the paper has carried out a comprehensive analysis of parallel inverter system performance and the stability.

关 键 词：辅助逆变器 小信号模型 下垂法 并联 

分 类 号：TM46[电气工程—电器]