c-C4F8/CF4替代SF6可行性的SST实验分析

被引：49

作者：

张刘春

肖登明

张栋

吴变桃

机构：

[1] 上海交通大学电气工程系

来源：

电工技术学报 | 2008年 / 06期

关键词：

c-C4F8/CF4; SF6; 稳态汤生; 耐电强度; 温室效应值;

D O I：

10.19595/j.cnki.1000-6753.tces.2008.06.003

中图分类号：

TM213 [气体电介质];

学科分类号：

摘要：

SF6以其良好的灭弧性能和绝缘特性广泛应用于高压电力设备中,但是随着《京都议定书》的签订及其要求,寻找温室效应指数(GWP)低的SF6替代气体变得越来越迫切,本文用稳态汤生(SST)实验方法探索了c-C4F8/CF4混合气体替代SF6的可行性。文中用SST实验方法测量了c-C4F8/CF4混合气体的电子崩电流I;基于本文改进的SST模型,用非线性最小二乘法拟合出c-C4F8/CF4混合气体的归一化放电参数(归一化电离系数α/N,归一化吸附系数η/N和归一化有效电离系数(α-η)/N);在(α-η)/N～E/N函数关系曲线中,令(α-η)/N=0,得到c-C4F8/CF4混合气体的耐电强度(E/N)lim;将c-C4F8/CF4的(E/N)lim及GWP与SF6的进行了比较,结果表明,c-C4F8/CF4在混合比大于50/50的情况下的(E/N)lim比纯净SF6的约高1.2%～32.6%,而GWP比纯净的SF6的约低63.6%～68.2%,因此c-C4F8/CF4替代SF6可行。

引用

页码：14 / 18

页数：5

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