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首页> 外文期刊>International Journal of Electrical Power & Energy Systems >On-line partial discharge monitoring system for underground MV cables - Part Ⅱ: Detection and location
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On-line partial discharge monitoring system for underground MV cables - Part Ⅱ: Detection and location

机译：地下中压电缆在线局部放电监测系统第二部分：检测与定位

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摘要

Condition based maintenance constitutes a useful tool towards upgrading aging infrastructure in the context of asset management in smart grids. Towards that aim, on-line partial discharge (PD-OL) monitoring systems can provide useful information regarding insulation degradation, that can be used to prevent destructive faults. In this study, a set of novel algorithms is proposed for utilization in such a system. More specifically, an enhanced approach is proposed to denoise partial discharge (PD) associated measurements, by the utilization of the discrete wavelet transform (DWT). Moreover, an overall process is presented for the efficient detection of peaks in denoised signals, and the respective calculation of the PD apparent charge. Furthermore, algorithms are proposed for the detection and location of PDs in practical applications, taking also into account possible pulse reflections, and disregarding the corresponding false positive detections. All proposed methods are rigorously tested, and the respective results are presented.
机译：基于条件的维护是在智能电网中的资产管理环境下升级老化基础结构的有用工具。为了实现该目标，在线局部放电（PD-OL）监控系统可以提供有关绝缘退化的有用信息，这些信息可以用来防止破坏性故障。在这项研究中，提出了一套新颖的算法供在这样的系统中使用。更具体地说，提出了一种增强的方法，通过利用离散小波变换（DWT）对与局部放电（PD）相关的测量进行降噪。此外，提出了用于有效检测去噪信号中的峰值以及PD表观电荷的相应计算的总体过程。此外，提出了用于在实际应用中PD的检测和定位的算法，还考虑了可能的脉冲反射，并且忽略了相应的假阳性检测。所有提出的方法均经过严格测试，并给出了相应的结果。

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