| 某电厂电压互感器铁磁谐振案例的分析及对策 |
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| 作者姓名： | 王权 李炜 |
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| 作者单位： | 葛洲坝水力发电厂,湖北省宜昌市443002 |
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| 摘 要： | 文章介绍了一起某电厂主变压器倒挂运行时,电压互感器发生分频谐振,导致主变压器低压侧开口三角电压报警动作的案例.结合现场检查处理情况,对铁磁谐振的原理进行了分析,并根据现场实际情况提出了变更运行方式、装设消谐电阻及消谐装置等应对措施.
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| 关 键 词： | 主变压器倒挂 分频谐振 过电压 |
Analysis and Countermeasures of Voltage Transformer Ferromagnetic Resonance Case in a Hydropower Plant |
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| Authors: | WANG Quan LI Wei |
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| Affiliation: | (Gezhouba Hydropower Plant,Yichang,443002,China) |
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| Abstract: | This paper introduces a case of voltage transformer frequency division resonance occurring when the main transformer is running upside down in a hydropower plant,which leads to the voltage alarm of the open-delta connection in main transformer lowvoltage side.The principle of ferromagnetic resonance is analyzed in combination with the on-site inspection and treatment,some countermeasures are put forward according to the actual situation,such as changing the operation mode,installing the harmonic elimination resistor and the harmonic elimination device. |
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| Keywords: | main transformer inverted operation frequency division resonance overvoltage |
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