| TV中性点经消谐电阻接地使二次电压异常的分析 |
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| 引用本文： | 王恒山,王铮,王门鸿,杨文陵.TV中性点经消谐电阻接地使二次电压异常的分析[J].华东电力,2012(2):320-323. |
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| 作者姓名： | 王恒山 王铮 王门鸿 杨文陵 |
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| 作者单位： | 泉州电业局 |
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| 摘 要： | 运行中发现10 kV母线电压互感器(简称TV)中性点经消谐电阻接地时的TV二次电压会出现异常。根据现场电压测试和TV特性试验,分析认为主要是TV三相的励磁特性不一致引起的,其次是三次谐波的影响。若换成励磁电流小、不易饱和、三相励磁电流差别小的TV,可把二次电压异常限制在允许的范围内。
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| 关 键 词： | 电压互感器 经消谐电阻接地 二次电压异常 TV励磁特性 解决措施 |
Analysis of Unusual Secondary Voltage with TV Neutral Grounding via Harmonic Elimination Resistor |
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| WANG Heng-shan,WANG Zheng,WANG Men-hong,YANG Wen-ling.Analysis of Unusual Secondary Voltage with TV Neutral Grounding via Harmonic Elimination Resistor[J].East China Electric Power,2012(2):320-323. |
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| Authors: | WANG Heng-shan WANG Zheng WANG Men-hong YANG Wen-ling |
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| Affiliation: | (Quanzhou Electric Bureau,Quanzhou 362000,China) |
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| Abstract: | Unusual secondary voltage may occur in power system with 10 kV bus voltage transformer(TV) neutral grounding via harmonic elimination resistor.Field voltage tests and TV characteristic tests indicate the causes consist in the different three-phase excitation characteristics of TV as well as the impact of third harmonic.Unusual secondary voltage can be restricted within the allowable range if TV is changed by products with smaller excitation current,higher level of saturation,and less different three-phase excitation current. |
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| Keywords: | voltage transformer grounding via harmonic elimination resistor unusual secondary voltage TV excitation characteristics solution |
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