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首页> 外文会议>2012 IEEE Student Conference on Research and Development >The nonlinear dielectric response of water tree degradation in a medium voltage power cable
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The nonlinear dielectric response of water tree degradation in a medium voltage power cable

机译：中压电力电缆中水树退化的非线性介电响应

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摘要

Medium voltage (MV) cross linked polyethylene (XLPE) insulated power cables are being used in electrical power distribution system networks throughout the world. Deterioration like voids, cracks, delimitation, protrusions and contaminants in the cable insulation may initiate water tree, electrical tree and partial discharge. Water treeing is the main cause of insulation failure in MV power cables. The nonlinear dielectric response of water tree generates harmonics in the AC loss current. This paper presents a detailed study of the characterization of XLPE cable insulation. The morphological study of XLPE cable samples has been carried out by using the Scanning Electron Microscope (SEM) and the chemical analysis has been carried out by using Fourier Transform Infrared spectroscopy (FTIR). The MATLAB/SIMULINK program has been used to model and simulate degradation in the power cable due to water tree. This model is simulated with supply frequencies at 50 Hz, 100 Hz and 150 Hz. The 3rd harmonic current has been recorded from the total current flowing through the cable insulation. The generated harmonics have a good relationship with degradation caused by water tree.
机译：中压（MV）交联聚乙烯（XLPE）绝缘电力电缆正在全世界的配电系统网络中使用。电缆绝缘中的空洞，裂缝，划界，突出和污染物之类的劣化可能会引发水树，电树和局部放电。水树是中压电力电缆绝缘失效的主要原因。水树的非线性介电响应会在交流损耗电流中产生谐波。本文对XLPE电缆绝缘特性进行了详细研究。使用扫描电子显微镜（SEM）进行了XLPE电缆样品的形态研究，并使用傅立叶变换红外光谱（FTIR）进行了化学分析。 MATLAB / SIMULINK程序已用于建模和模拟由于水树引起的电源电缆的退化。该模型是在50 Hz，100 Hz和150 Hz的电源频率下进行仿真的。从流过电缆绝缘层的总电流中记录了3 rd 谐波电流。产生的谐波与由水树引起的退化具有良好的关系。

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