| 风电场变压器差动保护区外接地故障误动原因分析 |
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| 引用本文： | 李晓馨,李文维,李子秋.风电场变压器差动保护区外接地故障误动原因分析[J].内蒙古电力技术,2012,30(5):105-107. |
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| 作者姓名： | 李晓馨 李文维 李子秋 |
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| 作者单位： | 1. 呼和浩特供电局,内蒙古 呼和浩特,010050
2. 内蒙古电力科学研究院,内蒙古 呼和浩特,010020 |
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| 摘 要： | 某风电场变压器发生区外接地故障,导致变压器差动保护误动作造成整个风电场停电事故。经分析,事故原因为变压器差动保护程序存在缺陷,计算差动电流时没有消除零序电流分量,造成差动保护误动作。采取升级保护软件版本的措施后,变压器运行至今未再发生类似事故。对此提出今后对于新建变电站变压器保护的配置、选型以及设备验收应符合相关规程要求,以杜绝此类事故的发生,确保电网的安全稳定运行。
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| 关 键 词： | 风电场 变压器 差动保护 中性点接地 间隙击穿 |
Cause Analysis of Transformer Differential Protection External Grounding Misoperation in Wind Farm |
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| Li Xiaoxin
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Li Wenwei
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Li Ziqiu.Cause Analysis of Transformer Differential Protection External Grounding Misoperation in Wind Farm[J].Inner Mongolia Electric Power,2012,30(5):105-107. |
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| Authors: | Li Xiaoxin Li Wenwei Li Ziqiu |
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| Affiliation: | 1.Hohhot Power Supply Bureau,Inner Mongolia Hohhot 010050; 2.Inner Mongolia Electric Power Science & Research Institute,Inner Mongolia Hohhot 010020) |
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| Abstract: | An external grounding fault resulted in the transformer differential protection misoperation,causing power cut accident of the wind farm.By analysis,the transformer differential protection process existing defects,the calculation of differential current without removing the zero sequence current resulted in the differential protection misoperation.After upgrading software version,the transformer hasn＇t occurred a similar incident again.It also puts forward demand of the new substation transformer protection configuration,equipment selection in accordance with the relevant regulations to prevent such accidents,and ensure power grids safe and stable operation. |
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| Keywords: | wind farm transformer differential protection neutral grounding gap breakdown |
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