| 引用本文: | 郭 成,陈 波,陈 慧,杨灵睿.基于相空间重构的中性点非有效接地系统铁磁谐振故障辨识研究[J].电力系统保护与控制,2024,52(15):131-141.[点击复制] |
| GUO Cheng,CHEN Bo,CHEN Hui,YANG Lingrui.Identification of ferromagnetic resonance fault in non-effectively grounded neutralsystem based on phase space reconstruction[J].Power System Protection and Control,2024,52(15):131-141[点击复制] |
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| 摘要: |
| 准确辨识铁磁谐振故障是启动微机消谐装置的前提，而现有时频分析方法提取铁磁谐振过电压信号特征时存在容易误判和相邻频率模态相互混叠的缺点。针对上述问题，从铁磁谐振过电压时间序列的混沌特征出发，提出了基于相空间重构的中性点非有效接地系统铁磁谐振故障辨识方法。首先利用C-C法计算相空间重构的特征参数(嵌入维数、延迟时间)，然后通过相空间重构技术将过电压时间序列引入到高维空间，分析重构吸引子相平面轨迹的属性特征(关联维数、点分布因数)和几何特征(矢径偏移、中心距)，并揭示了不同铁磁谐振类型重构相平面轨迹特征。最后，引入K值作为4种特征量变化规律的特征参数，结合特征量变化规律给出不同类型铁磁谐振的参考K值，以此作为谐振判据进而辨识谐振类型。通过仿真分析和云南某10 kV配电系统发生的铁磁谐振实例验证了所提方法的可行性。 |
| 关键词: 铁磁谐振 相空间重构 相平面 属性特征 几何特征 |
| DOI：10.19783/j.cnki.pspc.231292 |
| 投稿时间：2023-10-07修订日期：2023-11-21 |
| 基金项目:国家自然科学基金项目资助(52367002)；云南省联合基金重点项目资助(202201BE070001-15) |
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| Identification of ferromagnetic resonance fault in non-effectively grounded neutralsystem based on phase space reconstruction |
| GUO Cheng1,CHEN Bo1,CHEN Hui2,YANG Lingrui1 |
| (1. Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China;
2. Qujing Bureau of CSG EHV Power Transmission Company, Qujing 655000, China) |
| Abstract: |
| Accurate identification of ferroresonance faults is a prerequisite for starting a microcomputer detuning device, but the existing time-frequency analysis methods are prone to misjudgment and mutual aliasing of adjacent frequency modes when extracting the characteristics of ferroresonance overvoltage signals. To solve the above problems, based on the chaotic characteristics of ferroresonance overvoltage time series, this paper presents a method for fault identification of ferromagnetic resonance in non-effectively grounded neutral systems based on phase space reconstruction. First, the characteristic parameters (embedding dimension and delay time) of phase space reconstruction are calculated by C-C method. Then, the overvoltage time series is introduced into the high dimensional space by phase space reconstruction technology to analyze the attribute features (correlation dimension and phase point distribution coefficient) and geometric features (radius vector offset and center distance) of the reconstructed attractor phase plane trajectory. The characteristics of reconstructed phase plane trajectory of different ferroresonance types are revealed. Finally, the K value is introduced as the characteristic parameter of change law of four kinds of characteristic value, and the reference K value of different types of ferromagnetic resonance is given in combination with the characteristic change law, which is used as the resonance criterion to identify the resonance type. The feasibility of the proposed method is verified by simulation analysis and a real ferromagnetic resonance case in a 10 kV distribution system in Yunnan province. |
| Key words: ferromagnetic resonance phase space reconstruction phase plane attribute feature geometric feature |
