${500}/{\sqrt{3}}\;\text{kV}$0.002级多级励磁标准电压互感器设计与仿真分析

doi:10.19595/j.cnki.1000-6753.tces.200292

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Abstract

Insulation design of high voltage transformers is too difficult to effectively improve the measurement accuracy of existing standard voltage transformers. In this paper, the circuit of standard voltage transformer with multistage voltage hybrid excitation, both high and low voltage are included, was studied through simulation analysis under ideal conditions combining with multistage excitation theory. Firstly, the equivalent circuit of high voltage transformer was established according to the excitation scheme; secondly, evaluation formula of measuring accuracy were derived according to the equivalent circuit. Then, in combination with the actual demands, the theoretical parameters of voltage transformer at ${500}/{\sqrt{3}}\;\text{kV}$ with multistage voltage hybrid excitation were calculated, including the calculation of the internal impedance and the calculation of the excitation impedance. Finally, according to the calculation results of the above theoretical parameters, the measurement accuracy simulation values of the transformer were given. The simulation results show that the ratio error of the transformer structure is -2.27×10^-7% and the angle error is 3.44×10^-6%, which meet the accuracy level requirements of 0.002 greatly. And it can be tried to develop physical objects with these parameters.

Key words： Multistage excitation standard voltage transformer internal impedance excitation impedance angle error ratio error

Received: 23 March 2020

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TM45

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	Articles by authors
	Song Xiaolin
	Liu Hao
	Liu Hao
	Tang Xiaojun
	Zhou Zhenyu

Cite this article:

Song Xiaolin,Liu Hao,Liu Hao等. Simulation Analysis and Design of ${500}/{\sqrt{3}}\;\text{kV}$ Multistage Excitation Standard Voltage Transformer with Accuracy Class 0.002[J]. Transactions of China Electrotechnical Society, 2021, 36(9): 1967-1975.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200292 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I9/1967

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