| 瑞明电厂2号发电机中性点接地方式特性及定子接地保护分析 |
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| 引用本文： | 陈亚军,卢伟辉.瑞明电厂2号发电机中性点接地方式特性及定子接地保护分析[J].广东电力,2007,20(2):55-57,75. |
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| 作者姓名： | 陈亚军 卢伟辉 |
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| 作者单位： | 广东粤华发电有限责任公司,广州,510731 |
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| 摘 要： | 瑞明电厂2号发电机采用中性点经配电变压器高阻接地方式,1号发电机采用中性点经单相电压互感器接地方式,通过对二者接地方式不同特点的比较及对2号发电机接地保护的分析,提出瑞明电厂2号发电机定子单相接地保护的基波零序电压出口方式应该由信号改为投延时5 s跳闸,3次谐波电压比值出口则继续投信号位置的建议.
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| 关 键 词： | 中性点接地 定子接地保护 基波零序电压 3次谐波电压 |
| 文章编号： | 1007-290X（2007）02-0055-03 |
| 收稿时间： | 2006-08-25 |
| 修稿时间： | 2006-08-25 |
Characteristics of Neutral-point Earthing Way and Analysis of Stator Ground Fault Protection of Unit 2 Generator in Ruiming Power Plant |
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| CHEN Ya-jun,LU Wei-hui.Characteristics of Neutral-point Earthing Way and Analysis of Stator Ground Fault Protection of Unit 2 Generator in Ruiming Power Plant[J].Guangdong Electric Power,2007,20(2):55-57,75. |
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| Authors: | CHEN Ya-jun LU Wei-hui |
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| Affiliation: | Guangdong Yuehua Power Co., Ltd., Guangzhou 510731, China |
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| Abstract: | The neutral point of Unit 2 generator in Ruiming Power Plant is earthed through distribution transformer(high resistance),while that of Unit 1 through monophase voltage transformer.Based on the comparison of the two neutral-point earthing methods and the analysis of stator ground fault protection of Unit 2,it is suggested that the export way of fundamental-wave zero-sequence voltage of Unit 2 generator stator single-phase earth fault protection should be changed from emitting signal to 5 s delayed tripping,and the third-harmonic voltage ratio export maintain signal position. |
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| Keywords: | neutral-point earthing stator ground fault protection fundamental-wave zero-sequence voltage third-harmonic voltage |
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