电工技术学报  2024, Vol. 39 Issue (8): 2294-2310    DOI: 10.19595/j.cnki.1000-6753.tces.231432
“微电网稳定性分析与优化控制研究”专题(特约主编:张 波 李 虹 教授) |
基于频域阻抗网络建模分析的交直流微电网振荡问题研究
吴翔宇1,2, 张晓红1, 尚子轩1, 赵一钢3, 吴潇雨4
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;
3.国网山西省电力公司忻州供电公司 忻州 034001;
4.国网能源研究院有限公司 北京 102209
Research on the Oscillation Problem of AC-DC Microgrids Based on Frequency Domain Impedance Network Modeling and Analysis
Wu Xiangyu1,2, Zhang Xiaohong1, Shang Zixuan1, Zhao Yigang3, Wu Xiaoyu4
1. School of Electrical Engineering Beijing Jiaotong University Beijing 100044 China;
2. Beijing Engineering Research Center of Electric Rail Transportation Beijing 100044 China;
3. State Grid Shanxi Xinzhou Electric Power Company Xinzhou 034001 China;
4. Sate Grid Energy Research Institute Co. Ltd Beijing 102209 China
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摘要 交直流微电网在不同类型电力电子变流器的不同带宽控制环节作用下,容易引发系统发生宽频振荡问题。现有的微电网振荡分析主要基于阻抗分析法和特征分析法,然而这两种方法存在一定的局限性。为此,该文研究了基于频域阻抗网络模型的交直流微电网振荡问题建模与分析方法。首先,建立了交直流微电网在频域下的等效阻抗网络模型,并计算节点频域导纳矩阵及回路频域阻抗矩阵。其次,基于频域模式分析法,建立了交直流微电网的节点/回路振荡参与程度指标以及设备和控制参数的灵敏度指标,给出了振荡的交直流传播特性分析方法,便于明晰系统振荡机理与关键影响因素。最后,通过Matlab/Simulink时域仿真及算例分析验证了上述频域阻抗网络建模和振荡稳定性分析方法的有效性。
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吴翔宇
张晓红
尚子轩
赵一钢
吴潇雨
关键词 交直流微电网频域阻抗网络建模振荡稳定性频域模式分析    
Abstract:Microgrids are an effective form of organizing and utilizing distributed power sources, and are also an important component of new power systems. The AC-DC microgrid combines the characteristics and advantages of both AC and DC microgrids. However, under the dynamic interaction between different types of power electronic converters and the power grid, AC-DC microgrids are prone to trigger broadband oscillation problems, seriously threatening the safe and stable operation of the system. The analysis of microgrid oscillation problems in existing studies is mainly based on impedance analysis and feature analysis, but both methods have certain limitations. Therefore, this article conducts research on modeling and analysis methods for oscillation problems in AC-DC microgrids based on frequency domain impedance network models.
Firstly, based on the state space method, impedance models of various devices in the AC-DC microgrid system are established. Then, the various devices in the system are connected according to the topological relationship of the system, and an equivalent impedance network model of the AC-DC microgrid system in the frequency domain is established. Based on the principles of electrical networks, the node frequency domain admittance matrix and loop impedance frequency domain matrix of the system are calculated. Secondly, based on the frequency domain mode analysis method, indicators for the degree of node/loop oscillation participation and sensitivity indicators for equipment and control parameters of the AC-DC microgrid are established. The analysis method for the AC-DC propagation characteristics of oscillation is provided, which facilitates the clarification of the system oscillation mechanism and key influencing factors. Finally, the effectiveness of the above frequency domain impedance network modeling and oscillation stability analysis methods is verified through Matlab/ Simulink time-domain simulation and example analysis.
Key wordsAC-DC microgrids    frequency domain impedance network modeling    oscillation stability    frequency domain mode analysis   
收稿日期: 2023-08-31     
PACS: TM721  
基金资助:国家自然科学基金面上项目(52177066)资助
通讯作者: 吴翔宇 男,1990年生,副教授,硕士生导师,研究方向为微电网运行控制、可再生能源电力系统振荡分析与抑制、韧性电网。E-mail: wuxiangyu@bjtu.edu.cn   
作者简介: 张晓红 女,1998年生,硕士研究生,研究方向为微电网(群)稳定分析。E-mail: 21121535@bjtu.edu.cn
引用本文:   
吴翔宇, 张晓红, 尚子轩, 赵一钢, 吴潇雨. 基于频域阻抗网络建模分析的交直流微电网振荡问题研究[J]. 电工技术学报, 2024, 39(8): 2294-2310. Wu Xiangyu, Zhang Xiaohong, Shang Zixuan, Zhao Yigang, Wu Xiaoyu. Research on the Oscillation Problem of AC-DC Microgrids Based on Frequency Domain Impedance Network Modeling and Analysis. Transactions of China Electrotechnical Society, 2024, 39(8): 2294-2310.
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