电瓷避雷器Issue(2)：134-142,9.DOI:10.16188/j.isa.1003-8337.2025.02.017
不同中性点接地方式雷击建弧率的研究
Arcing Rate of Lightning Strike in Different Neutral Grounding Modes
郝树青 1何肖蒙 2张洋 1李华鹏3
作者信息
- 1. 贵州电网有限责任公司电力科学研究院,贵阳 550000
- 2. 贵州电网有限责任公司贵阳供电局,贵阳 550000
- 3. 贵州电网有限责任公司兴义供电局,贵州 兴义 562400
- 折叠
摘要
Abstract
The distribution network comprises numerous lines with wide coverage,making it vulnerable to lightning strikes and causing significant damage.Through analysis of arc building mechanism and arc ex-tinguishing characteristics,although the neutral point ungrounded method is not easy to build an arc,once it is difficult to extinguish the arc,there will still be a high arc building rate when the system capa-citance current is large.If the compensation degree is insufficient or high under the arc suppression coil grounding method,it will increase the probability of grounding arc reignition.Although the low resistance grounding method can protect against arc grounding overvoltage,it cannot identify the nature of the fault and cannot handle high resistance grounding faults.Therefore,the neutral grounding method can be opti-mized according to the different line structures of the distribution network to reduce the lightning arcing rate.The ungrounded method is only applicable to distribution networks with a capacitance current of less than 10A and mainly consisting of overhead bare wires.The arc suppression coil grounding method is suitable for overhead distribution networks and mixed distribution networks with overhead and cable lines as the main components.The small resistance grounding method is suitable for cable lines or mixed distri-bution networks with overhead and cable lines as the main components.关键词
配电网/中性点接地方式/雷击建弧率/弧光接地过电压Key words
distribution network/neutral grounding method/lightning strike arcing rate/arc grounding overvoltage引用本文复制引用
郝树青,何肖蒙,张洋,李华鹏..不同中性点接地方式雷击建弧率的研究[J].电瓷避雷器,2025,(2):134-142,9.
