基于灵敏度理论的逆变器并网系统谐振特性分析  

Harmonic resonance characteristics of grid-connected system based on sensitivity theory

作　　者：武健[1] 刘子栋 王超[1] 赵家琦 尤燕飞 徐殿国[1] WU Jian;LIU Zi-dong;WANG Chao;ZHAO Jia-qi;YOU Yan-fei;XU Dian-guo(School of Electrical Engineeringand Automation,Harbin Institute of Technology,Harbin 150006,China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150006

出　　处：《电机与控制学报》2018年第12期11-21,29,共12页Electric Machines and Control

基　　金：国家自然科学基金(51407043);台达电力电子科教发展基金(DREM2014015);新能源与储能运行控制国家重点实验室开放基金资助

摘　　要：针对逆变器并网系统的串、并联谐振分析,采用灵敏度分析理论,得到特定次谐波谐振的元件参与度、谐振回路构成情况等信息。在模态分析的基础上,通过求解网络矩阵特征值对系统元件的偏导值,分别给出了系统各元件在谐振频率下的串、并谐振归一化灵敏度求解公式,得到系统元件对特定次频率谐振的参与度。建立了四节点并网测试系统,对各元件进行灵敏度分析,得了到各元件谐振参与度。同时灵敏度分析结果说明,串联谐振与并联谐振在同一谐振频率下参与元件不完全相同。仿真和实验结果证明了灵敏度分析的有效性。In order to determine the networl^components which contrilDutes significantly to a harmonic resonance phenomenon and composition of the resonant circuit,the sensitivity the〇r was applied to resonance characteristic analysis.Based on the modal analysis,the theory of sensitivity was applied to derive the solving formula for the sensitivities of each network component parameter under resonance circum-stance,which reflects the participation of the network component.The solving formula was derived for parallel harmonic resonance and series harmonic resonance resjDectively.This solving formula was adapted to the 4-node grid-connected test system and the analysis result was obtained.Besides,the analysis results indicate that for certain frequency,the particij^ation of parallel resonance and series resonance are not all the same.Finally,the results of simulation and experiment prove that the solving formula for sen sitivity is feasible for grid-connected system.

关 键 词：逆变器并网系统 灵敏度分析 谐振特性 元件参与度 谐振中心 

分 类 号：TM315[电气工程—电机]