| 引用本文: | 刘淇玉,李永刚,王月,吴滨源,黄齐林,王鸥.多并网逆变器系统灰箱阻抗辨识与阻抗聚合分析方法[J].电力自动化设备,2022,42(11): |
| LIU Qiyu,LI Yonggang,WANG Yue,WU Binyuan,HUANG Qilin,WANG Ou.Grey-box impedance identification and impedance aggregation analysis method for multiple grid-connected inverter system[J].Electric Power Automation Equipment,2022,42(11): |
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| 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。 |
| 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 |
| DOI：10.16081/j.epae.202208021 |
| 分类号:TM464;TM712 |
| 基金项目:国家电网公司科技项目(SGJBTS00FZJS2100341) |
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| Grey-box impedance identification and impedance aggregation analysis method for multiple grid-connected inverter system |
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LIU Qiyu1, LI Yonggang1, WANG Yue2, WU Binyuan1, HUANG Qilin1, WANG Ou3
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1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Baoding 071003, China;2.Nantong Power Supply Subsidiary Company of State Grid Jiangsu Electric Power Co.,Ltd.,Nantong 226006, China;3.Information and Communication Branch, State Grid Liaoning Electric Power Supply Co.,Ltd.,Shenyang 110002, China
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| Abstract: |
| 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. |
| Key words: grid-connected inverter impedance-based analysis grey-box vector fitting algorithm impedance aggregation path zero-pole cancellation |
