配电网弧光接地故障电弧数学模型研究进展

Comparison and Analysis of Arc Models in Distribution Networks

单相弧光接地故障是配网中最常见的故障类型,其引起的弧光过电压对电网危害很大。但由于电弧特性的随机性,导致针对弧光接地的保护措施效果有限。因此需要研究电弧本身的电磁暂态特性。黑盒模型现在被广泛应用于电弧仿真,是研究电弧特性的有力工具。目前已经发展出了以Cassie和Mayr模型为基础的一系列黑盒模型以及其他黑盒模型,它们各有侧重。本文比较分析了常见的一些黑盒模型的特点和适用范围,为配网中电弧模型的选择提供了参考。

Single-phase arc grounding fault is the most common type of fault in distribution network.The arc overvoltage caused by single-phase arc grounding fault is very harmful to the power network.However,due to the randomness of arc characteristics,the protection measures for arc grounding are limited.Therefore,it is necessary to study the electromagnetic transient characteristics of the arc itself.Black-box model is widely used in arc simulation and is a powerful tool for studying arc characteristics.At present,a series of black-box models based on Cassie and Mayer models and other black-box models have been developed.Each of them has its own emphasis.In this paper,the characteristics and application scope of some common black-box models are compared and analyzed,which provides a reference for the selection of arc models in distribution network.