| 线路高阻接地零差保护灵敏性分析及调试 |
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| 引用本文： | 程华,王静.线路高阻接地零差保护灵敏性分析及调试[J].四川电力技术,2007,30(4):69-72. |
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| 作者姓名： | 程华 王静 |
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| 作者单位： | 成都电业局继电保护所,四川,成都,610021 |
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| 摘 要： | 随着光纤通信技术的发展,电流差动保护越来越多地运用于超高压线路的主保护中。针对高阻接地的特殊故障,仔细分析了分相电流差动保护和零序电流差动保护的动作特性,并得出结论:高阻接地时,零序差动比相电流差动更灵敏。最后针对零差保护提出了完整的现场调试方法。
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| 关 键 词： | 高阻接地 零差 相差 试验方法 |
| 文章编号： | 1003-6954（2007）04-0069-04 |
| 修稿时间： | 2007-05-27 |
Sensitivity Analysis of Zero-sequence Current Differential Protection for Line High-resistance Grounding and Its Testing Method |
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| Cheng Hua,Wang Jing.Sensitivity Analysis of Zero-sequence Current Differential Protection for Line High-resistance Grounding and Its Testing Method[J].Sichuan Electric Power Technology,2007,30(4):69-72. |
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| Authors: | Cheng Hua Wang Jing |
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| Affiliation: | Cheng Hua Wang Jing |
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| Abstract: | With the progress of optical-fiber communication technique,current differential protection is widely used in the main protection of EHV transmission lines.Aiming at high-resistance grounding faults,the operating characteristics of phase current differential protection and zero-sequence current differential protection are analyzed,and a conclusion is obtained that when high-resistance grounding,zero-sequence current differential protection is more sensitive than phase current differential protection.Finally,an integrated testing method is proposed for zero-sequence current protection. |
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| Keywords: | high-resistance grounding zero-sequence current differential phase current differential testing method |
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