中压交直流配电技术充液绝缘的电场模型

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI:10.1109/CEIDP50766.2021.9705406

A. Cremasco, M. Curti, J. van Duivenbode, E. Lomonova, D. Rothmund

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引用次数: 1

摘要

研究了恒定直流电压作用下均匀温度下充液绝缘系统中的电场。本文强调了用电-水动力学(EHD)方程进行电荷输运建模的重要性。通过分析由矿物油和浸渍纸绝缘分开的两个电极之间的电场强度，将EHD模型与计算成本较低的准欧姆传导(qΩ)模型进行了比较。首先，EHD模型通过文献中可用的测量进行验证。接下来，为了一致地比较模型，qΩ模型中使用的视电导率由经过验证的EHD模型外推，作为电场强度的函数。由于固体绝缘中存在空间电荷，因此观察到qΩ模型与EHD模型和测量值的显著偏差。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Electric Field Models for Liquid-Filled Insulation of Medium-Voltage AC/DC Distribution Technology

The electric field in a liquid-filled insulation system at uniform temperature, subjected to constant dc voltage is investigated. This work emphasizes the importance of charge transport modeling by electro-hydro dynamic (EHD) equations. The EHD model is compared with the quasi-ohmic conduction (qΩ) model, often preferred for the lower computational cost, by analyzing the electric field intensity between two electrodes separated by mineral oil and impregnated paper insulation. First, the EHD model is verified by measurements available from the literature. Next, to compare the models consistently, the apparent conductivities used in the qΩ model are extrapolated by the verified EHD model, as a function of the electric field intensity. A significant deviation of the qΩ model from both the EHD model and the measurements is observed, due to the presence of space charge in the solid insulation.

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2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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