| 直流下SF6中绝缘子的闪络特性 |
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| 引用本文： | 贾志杰,张乔根,张斌,范建斌,李金忠,李鹏.直流下SF6中绝缘子的闪络特性[J].高电压技术,2009,35(8):1903-1907. |
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| 作者姓名： | 贾志杰 张乔根 张斌 范建斌 李金忠 李鹏 |
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| 作者单位： | 1. 西安交通大学电气工程学院,西安,710049
2. 中国电力科学研究院,北京,100192 |
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| 基金项目： | 国家自然科学基金(50877073)~~ |
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| 摘 要： | 直流气体绝缘金属封闭输电线路(GIL)在特殊环境下可替代部分架空输电线路或电缆,提高输电走廊选择的灵活性。严重影响GIL绝缘水平的关键因素之一是直流下沿支撑绝缘子表面的电荷积聚。为了研究该问题,建立了一个锥板电极系统来模拟GIL中同轴圆柱结构的电场分布,通过试验研究了直流下SF6中绝缘子的材料和形状对其闪络特性的影响,并利用有限元分析软件对不同形状的绝缘子进行了电场计算。结果表明,直流GIL中绝缘子的表面电导率和充电时间常数均对其表面电荷积聚和沿面闪络有重要影响。同时还提出了基于锥板电极的直流GIL的绝缘子表面电导率选取原则和外形结构优化注意事项。
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| 关 键 词： | 表面电荷积聚 表面电导率 闪络电压 表面粗糙度 电场分布 形状 |
Flashover Characteristic Along the Insulator Under DC Voltage in SF_6 Gas |
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| JIA Zhi-jie
,
ZHANG Qiao-gen
,
ZHANG Bin
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FAN Jian-bin
,
LI Jin-zhong
,
LI Peng.Flashover Characteristic Along the Insulator Under DC Voltage in SF_6 Gas[J].High Voltage Engineering,2009,35(8):1903-1907. |
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| Authors: | JIA Zhi-jie ZHANG Qiao-gen ZHANG Bin FAN Jian-bin LI Jin-zhong LI Peng |
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| Affiliation: | 1. School of Electrical Engineering;Xi'an Jiaotong University;Xi'an 710049;China;2. China Electric Power Research Institute;Beijing 100192;China |
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| Abstract: | In order to promote the flexibility about the selection of transmission corridor,DC gas insulated transmission line (GIL) can be utilized to substitute part of the overhead line or cable in special environment such as cross connections inside of substations or connections between new remote generation areas and the load centers. One of the predominant factors that greatly threaten the insulation level of GIL is the accumulation of surface charges along the supporting insulators under DC voltage. Consequentl... |
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| Keywords: | surface charge accumulation surface conductivity flashover voltage surface roughness distribution of electric field geometry |
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