SF6/N2混合气体绝缘特性的实验研究

doi:10.11930/j.issn.1004-9649.2012.12.71.4

中国电力 ›› 2012, Vol. 45 ›› Issue (12): 71-75.DOI: 10.11930/j.issn.1004-9649.2012.12.71.4

SF6/N2混合气体绝缘特性的实验研究

孙鹏程, 王帮田, 洪文芳, 王其中

许继集团有限公司,河南许昌 461000

收稿日期:2012-09-07 出版日期:2012-12-25 发布日期:2016-02-04
作者简介:孙鹏程（1976—）,男,江西余江人,高级工程师,从事环保型气体绝缘开关设备技术、地面自动过分相技术的开发与应用工作。

Experimental Studies on Electrical Insulation Performances of SF₆ /N₂ Gas Mixtures

SUN Peng-cheng, WANG Bang-tian, HONG Wen-fang, WANG Qi-zhong

Xuji Group Corporation, Xuchang 461000, China

Received:2012-09-07 Online:2012-12-25 Published:2016-02-04

摘要/Abstract

摘要： 目前绝大多数气体绝缘开关设备采用SF₆气体绝缘,SF₆泄漏导致严重的环保问题,人们迫切希望少采用或不采用SF₆气体,以降低对环境的污染。为此,试验研究SF₆和SF₆/N₂混合气体在不同混合比、不同压力以及在不同电场结构下的击穿特性,并与SF₆气体的绝缘性能进行比较,试验结果表明：在N₂中注入20%~30%的SF₆气体后,SF₆/N₂混合气体绝缘性能指标可以达到纯SF₆气体的80%左右,但若继续增加SF₆气体的配比,则其耐电强度上升的幅度明显变慢;此外,试验研究还发现,极不均匀电场会大大降低气体的耐击穿电压强度。试验研究证明了采用SF₆/N₂混合气体代替纯SF₆气体的技术方案的可行性。

关键词: 气体绝缘开关设备, SF6/N2混合气体, SF6气体, 电气绝缘特性, 耐电强度, 击穿电压, 环境保护

Abstract: SF₆ gas is widely used for gas-insulated switchgear(GIS), which has led to public concerns about environmental pollutions. It is urgently required to reduce or eliminate the use of SF₆ gas in GISs so as to reduce the environmental pollutions. Various experiments were conducted to study the electrical breakdown characteristics of SF₆ gas and N₂/SF₆ gas mixtures under different mixing ratios and working pressures and in different electric-field structures. The testing results indicate that the N₂/SF₆ gas mixture, when 20%~30% of SF₆-gas is inputted in N₂, can attain 80% of pure SF₆ gas in electrical strength, but will have no significant increase in the strength with further increase of SF₆-gas ratio. Moreover, it was found that the extremely uneven structure of electric field will significantly reduce the electrical strength of the gas. The testing results has verified the feasibility of SF₆/N₂ gas mixture in substituting pure SF₆ gas.

Key words: gas-insulated switchgear (GIS), SF6/N2-mixed gas, SF6 gas, electrical insulation property, electric strength, breakdown voltage, environmental protection

中图分类号:

TM213

孙鹏程, 王帮田, 洪文芳, 王其中. SF6/N2混合气体绝缘特性的实验研究[J]. 中国电力, 2012, 45(12): 71-75.

SUN Peng-cheng, WANG Bang-tian, HONG Wen-fang, WANG Qi-zhong. Experimental Studies on Electrical Insulation Performances of SF₆ /N₂ Gas Mixtures[J]. Electric Power, 2012, 45(12): 71-75.

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SF6/N2混合气体绝缘特性的实验研究

Experimental Studies on Electrical Insulation Performances of SF₆ /N₂ Gas Mixtures

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SF6/N2混合气体绝缘特性的实验研究

Experimental Studies on Electrical Insulation Performances of SF6 /N2 Gas Mixtures

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Experimental Studies on Electrical Insulation Performances of SF₆ /N₂ Gas Mixtures