多并网逆变器系统灰箱阻抗辨识与阻抗聚合分析方法  

Grey-box impedance identification and impedance aggregation analysis method for multiple grid-connected inverter system

作　　者：刘淇玉 李永刚[1] 王月 吴滨源 黄齐林 王鸥 LIU Qiyu;LI Yonggang;WANG Yue;WU Binyuan;HUANG Qilin;WANG Ou(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Baoding 071003,China;Nantong Power Supply Subsidiary Company of State Grid Jiangsu Electric Power Co.,Ltd.,Nantong 226006,China;Information and Communication Branch,State Grid Liaoning Electric Power Supply Co.,Ltd.,Shenyang 110002,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003 [2]国网江苏省电力有限公司南通供电分公司,江苏南通226006 [3]国网辽宁省电力有限公司信息通信分公司,辽宁沈阳110002

出　　处：《电力自动化设备》2022年第11期92-98,105,共8页Electric Power Automation Equipment

基　　金：国家电网公司科技项目(SGJBTS00FZJS2100341)。

摘　　要：新能源发电网络谐波振荡问题凸显,阻抗分析法分析该问题的关键是聚合路径的正确选择。对此,提出了一种考虑零极点对消现象的多并网逆变器系统阻抗聚合方法。说明新能源发电网络及其对应阻抗网络的建立过程,并对新能源发电阻抗网络的聚合过程进行展现;基于“灰箱”背景利用矢量匹配算法对并网逆变器、电抗器和电容器的阻抗模型进行获取;对阻抗聚合路径中可能存在的零极点对消现象进行理论基础分析。在MATLAB/Simulink中搭建多并网逆变器系统进行仿真,分别选择不同的阻抗聚合路径,利用阻抗分析法进行系统稳定性分析,进一步验证所提聚合方法的有效性和实用性。The problem of harmonic oscillation in new energy power generation network is prominent.The key to analyze this problem by impedance analysis method is the correct choice of aggregation path.For this,an impedance aggregation method of multiple grid-connected inverter system considering zero-pole cancellation is proposed.The establishment process of new energy power generation network and its corresponding impedance network is explained,and the aggregation process of new energy power generation impedance network is shown.Based on the gray-box background,the impedance models of grid-connected inverter,reactor and capacitor are obtained by vector fitting algorithm.The possible zero-pole cancellation phenomenon in the impedance aggregation path is analyzed theoretically.A multiple grid-connected inverter system is built in MATLAB/Simulink for simulation,different impedance aggregation paths are selected,and the system stability is analyzed by impedance analysis method to further verify the effectiveness and practicability of the proposed aggregation method.

关 键 词：并网逆变器 阻抗分析法 灰箱 矢量匹配算法 阻抗聚合路径 零极点对消 

分 类 号：TM464[电气工程—电器] TM712