| 对110 kV零序方向电流保护方向正确性的讨论 |
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| 引用本文： | 王轶.对110 kV零序方向电流保护方向正确性的讨论[J].广东电力,2006,19(11):31-34. |
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| 作者姓名： | 王轶 |
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| 作者单位： | 韶关坪石供电局,广东,韶关,512229 |
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| 摘 要： | 就不同类型零序方向电流保护的方向正确性进行讨论。阐述了中性点直接接地系统单相接地短路时零序电压、零序电流、零序功率的特点，对常规零序方向保护和微机型零序方向保护的原理进行了对比分析，指出LG12型功率方向继电器以及WXH-11型、CSL-160型零序方向保护中零序功率方向的正确接线方式。
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| 关 键 词： | 中性点直接接地系统 单相接地短路 零序方向保护 功率方向 |
| 文章编号： | 1007-290X(2006)11-0031-03 |
| 修稿时间： | 2006年5月10日 |
On direction validity of 110 kV zero-sequence directional current protection |
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| WANG Yi.On direction validity of 110 kV zero-sequence directional current protection[J].Guangdong Electric Power,2006,19(11):31-34. |
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| Authors: | WANG Yi |
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| Abstract: | The direction validity of various zero-sequence directional current protections is dealt with in this paper.The characteristics of the zero-sequence voltage,zero-sequence current and zero-sequence power during a single-phase earth fault in a solidly earthed neutral system are expounded;the principles of conventional zero-sequence directional protection and microcomputer based zero-sequence directional protection are compared and analyzed.The correct connection means of zero-sequence power direction for LG-12 power direction relay and WXH-11,CSL-160 zero-sequence directional protections are indicated as well. |
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| Keywords: | solidly earthed neutral system single-phase earth fault zero-sequence directional protection power direction |
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