| 所用变压器重瓦斯保护误动原因分析及回路改造 |
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| 引用本文： | 占晓友,石卓.所用变压器重瓦斯保护误动原因分析及回路改造[J].安徽电气工程职业技术学院学报,2008,13(3). |
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| 作者姓名： | 占晓友 石卓 |
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| 作者单位： | 巢湖供电公司,安徽,巢湖市,238000 |
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| 摘 要： | 针对安徽500kV昭关变电所两次发生拉合500kV开关引起所用变瓦斯保护误跳闸事件,详细分析了事故原因,得出的结论是重瓦斯保护中间继电器功率过小,不能躲过500kV系统倒闸操作时的直流扰动。文章提出了对继电器功率进行适当放大的措施,解决了该所瓦斯保护误跳闸的问题。
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| 关 键 词： | 所用变压器 中间继电器 重瓦斯保护 回路改造 |
Analysis and Circuit Modification of Heavy Gas Protection Misoperation for Station Transformer |
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| ZHAN Xiao-you,SHI Zhuo.Analysis and Circuit Modification of Heavy Gas Protection Misoperation for Station Transformer[J].Journal of Anhui Electrical Engineering Professional Technique College,2008,13(3). |
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| Authors: | ZHAN Xiao-you SHI Zhuo |
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| Abstract: | According to the two wrong tripping events caused by the heavy gas protection of station transformer while opening 500kV breaker in Anhui 500kV Zhaoguan Electric Power Station,this paper analyses the reason of the accident in detail and comes to the conclusion that the power of the intermediate relay of the heavy gas protection was too small to escape the DC disturbance caused by 500 kV system switch operation.On this foundation,the paper proposes the measures to resolve the problem successfully by enlarging the power of the intermediate relay appropriately. |
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| Keywords: | station transformer intermediate relay heavy gas protection circuit modification |
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