Breakdown voltage characteristics in the SF6/N2 gas mixtures for DS/ES compartment of a 245kV gas insulated switchgear

2011 1st International Conference on Electric Power Equipment - Switching Technology Pub Date : 2011-10-01 DOI:10.1109/ICEPE-ST.2011.6123009

Wang-Byuck Suh, Jae-Yun Yim, K. Song, Yong-moo Chang, D. Bae

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引用次数: 2

Abstract

The SF6 gas insulated switchgear (GIS) is the electric power equipment for transmission and distribution line which reduced the size of the electric power equipments by installing in a sealed tank. Since the size of the GIS is about 1/10 of the air insulated switchgear, high quality insulation gas should be used. However this gas is a source of global warming and its production cost is very high because of expensive insulation material. Therefore, it is necessary either to develop a new relative gas: air and N2 gas or to reduce SF6 gas. The development of N2 mixture gas is needed when we consider safety and economic feasibility. In this study, a full scaled gas chamber for DS/ES compartment was designed and evaluated the breakdown voltage characteristics. In the mixing ratio of SF6/N2=50/50, insulation performance tests for DS/ES compartment for 245kV GIS were also conducted. By comparing and analyzing SF6 gas and SF6/N2 mixture gas, the results will be actually used as the standard reference of insulation design for eco-friendly 245kV GIS.

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245kV气体绝缘开关柜DS/ES室SF6/N2混合气体击穿电压特性

SF6气体绝缘开关设备(GIS)是一种将电力设备安装在密封罐中，减小电力设备体积的输配电线路用电设备。由于GIS的尺寸约为空气绝缘开关柜的1/10，故应选用优质绝缘气体。然而，这种气体是全球变暖的一个来源，由于昂贵的绝缘材料，其生产成本非常高。因此，要么开发一种新的相对气体:空气和N2气体，要么减少SF6气体。在考虑安全性和经济可行性的前提下，需要开发N2混合气。本研究设计了一个全尺寸的DS/ES气室，并对其击穿电压特性进行了评估。在SF6/N2配比为50/50的情况下，对245kV GIS的DS/ES隔室进行了绝缘性能试验。通过对SF6气体和SF6/N2混合气体的对比分析，实际结果将作为环保245kV GIS绝缘设计的标准参考。

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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2011 1st International Conference on Electric Power Equipment - Switching Technology

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