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| Establishment of National Voltage Ratio Standard for 1000kV at Power Frequency Based on the Series Voltage Summation |
| ZHOU Feng1,2,YUE Chang-xi2,LEI Min2,WANG Le-ren2,JIANG Chun-yang2 |
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
2. China Electric Power Research Institute, National Center for High Voltage Measurement,Wuhan, Hubei 430074,China |
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Abstract Based on a specially designed 1000kV series standard voltage transformer with high accuracy of 0.01 level,an experiment of 1000kV power frequency voltage summation is finished successfully by National Center for High Voltage Measurement .The experimental results show that the uncertainties of measurement of voltage ratio error and phase difference are not more than 2×10-5 and 0.06′ respectively. Compared the results by the traditional voltage coefficient measuring method with an 800kV compressed gas capacitors, the maximum deviation of voltage ratio error and phase difference is 2.7×10-5 and 0.11′ respectively.And neither of the maximum deviations exceeds 90% confidence interval of values of the two methods.
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2012, Vol. 33 
