Modelling of Electric Field Distributions on Cable Termination Defects under DC Plus Ripples
Modelling of Electric Field Distributions on Cable Termination Defects under DC Plus Ripples
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DOI：
10.1109/eic55835.2023.10177362
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发表时间：
2023-06
期刊：
影响因子：
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通讯作者：
Shahtaj Shahtaj-Shahtaj;Fulin Fan;Brian G. Stewart
中科院分区：
文献类型：
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作者：
Shahtaj Shahtaj-Shahtaj;Fulin Fan;Brian G. Stewart
由于形成XLPE的易用和低成本，交联的聚乙烯（XLPE）电缆被广泛用于高压传输和中型电压（MV）分布网络。但是，XLPE电缆附件（例如接头和终止）的缺陷将增加当地电场并产生电气放电，从而侵蚀电缆绝缘，并最终导致绝缘故障。本文开发有限元模型，以模拟电缆终止处的小半尖端缺陷及其在MVDC应力电压下以及低频波纹下产生的电场失真。研究了半尖端长度，波纹含量和电缆温度梯度对电场分布的影响，以了解与MVDC XLPE电缆的实际操作有关的分号尖端缺陷的电场变形。
Cross-linked polyethylene (XLPE) cables are widely employed in high voltage transmission and medium voltage (MV) distribution networks due to the ease and low cost of forming the XLPE. However, defects in XLPE cable accessories such as joints and terminations will increase the local electric field and produce electrical discharges that erode the cable insulation and eventually result in the insulation failure. This paper develops finite element models to simulate small semicon tip defects at cable terminations and their resulting electric field distortion under MVDC stress voltage plus low frequency ripples. The influences of semicon tip lengths, ripple content and cable temperature gradients on electric field distributions are investigated to understand the electric field distortion surrounding semicon tip defects in relation to practical operation of MVDC XLPE cables.