| 考虑负荷特性的XLPE电缆绝缘老化程度研究 |
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| 引用本文： | 杨亮,周恺,倪周,黄宗武,叶宽,蔡瀛淼,李春生.考虑负荷特性的XLPE电缆绝缘老化程度研究[J].陕西电力,2020,0(10):113-119. |
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| 作者姓名： | 杨亮 周恺 倪周 黄宗武 叶宽 蔡瀛淼 李春生 |
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| 作者单位： | 1. 国网北京电力科学研究院， 北京 100075； 2. 武汉大学 电气与自动化学院，湖北 武汉 430072 |
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| 摘 要： | 为了规避传统介损在线监测法带来的电流传感器测量误差以及环境的影响，建立了基于泄漏电流矢量差的电缆相对绝缘老化程度的判断依据。首先，分析了基于电缆不同连接方式的电缆介损；然后，在考虑电缆所接负荷的负荷特性的基础上，分析了泄漏电流的变化特性，得出了接地电流的变化量与泄漏电流的变化量相同，可以通过接地电流值的变化特性判断电缆绝缘老化程度的结论。最后，利用仿真分析了改变电缆绝缘等效阻抗模拟电缆绝缘老化情况下，电缆泄漏电流与接地电流的变化特性，验证了理论分析的准确性与有效性。
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| 关 键 词： | XLPE电缆 介质损耗角 泄漏电流矢量差 负荷特性 连接方式 接地电流 |
Analysis of XLPE Cable Insulation Aging Considering Load Characteristics |
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| YANG Liang,ZHOU Kai,NI Zhou,HUANG Zongwu,YE Kuan,CAI Yingmiao,LI Chunsheng.Analysis of XLPE Cable Insulation Aging Considering Load Characteristics[J].Shanxi Electric Power,2020,0(10):113-119. |
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| Authors: | YANG Liang ZHOU Kai NI Zhou HUANG Zongwu YE Kuan CAI Yingmiao LI Chunsheng |
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| Affiliation: | 1. State Grid Beijing Electric Power Research Institute，Beijing 100075，China； 2. School of Electrical Engineering and Automation，Wuhan University，Wuhan 430072，China |
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| Abstract: | In order to avoid current sensor measurement error and the influence of environment caused by traditional dielectric loss online monitoring method，the paper establishes criterion for judging the relative aging degree of XPLE cable insulation based on leakage current vector difference. Firstly，the dielectric loss of the cable is analyzed based on different cable connections. Then the change characteristics of leakage current are analyzed on the basis of considering the cable load characteristics， concluding that the variation of grounding current is the same as that of the leakage current and that the variation of grounding current can be used to judge the aging degree. Finally，the leakage current and grounding current of the cable is analyzed by changing the equivalent impedance of the cable insulation to simulate the aging of the cable insulation， and the accuracy and effectiveness of the theoretical analysis is verified. |
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| Keywords: | XLPE cable dielectric loss angle leakage current vector difference load characteristics connection mode grounding current |
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