氮气环网柜中复合绝缘的工频特性研究

发布时间：2018-02-24 11:20

本文关键词： 气体绝缘环保型开关绝缘配合电场分布复合绝缘　出处：《高压电器》2016年12期 　论文类型：期刊论文

【摘要】：采用氮气(N_2)或干燥空气替代SF_6作为中压开关设备的绝缘介质是目前环保型开关设备的发展热点。要保证气箱结构紧凑小巧,需要完全掌握环保气体的绝缘特性,并对固体—气体复合绝缘的配合进行深入研究。文中从研究N_2的基础绝缘特性入手,研究了不同电场均匀度、气体压力以及电极间隙下的N_2工频耐压特性数据,提出了N_2绝缘的经验公式以指导气箱的整体设计和局部优化。基于N_2气箱关键部位的绝缘配合的系统性的建模仿真分析,结合局部复合绝缘的耐压特性实验,得到结论气箱结构设计中需要采用极不均匀场的特性作为设计依据,同时在关键位置的固体—气体复合绝缘处需要保证足够的气体间隙。
[Abstract]:Using nitrogen gas N2) or dry air instead of SF_6 as insulation medium for medium voltage switchgear is a hot spot in the development of environment-friendly switchgear at present. In order to ensure the compact and compact structure of the gas box, it is necessary to have a complete grasp of the insulation characteristics of the environmental protection gas. In this paper, the basic insulation characteristics of NSP _ 2 are studied, and the data of the power frequency voltage characteristics of N _ 2 under different electric field uniformity, gas pressure and electrode gap are studied. The empirical formula of NSP _ 2 insulation is put forward to guide the overall design and local optimization of the gas tank. Based on the systematic modeling and simulation analysis of the insulation coordination in the key parts of the gas tank, combined with the test of the voltage resistance characteristics of the local composite insulation, It is concluded that the characteristics of extremely inhomogeneous field should be used as the basis for the structural design of the gas tank, and at the same time, sufficient gas gap should be ensured at the solid-gas composite insulation at the key position.
【作者单位】：南京南瑞集团公司智能电器装备事业部;上海交通大学电气系;
【基金】：国家自然科学基金项目资助(51337006)~~
【分类号】：TM643

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