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| Influence analysis of voltage transformer secondary disconnection on three-phase three-wire measurement |
| Deng Dezheng1, Zhao Ruoyang2 |
1. State Grid Tianjin Dongli Power Supply Company, Tianjin 300300;
2. State Grid Tianjin Chengnan Power Supply Company, Tianjin 300000 |
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Abstract Combined with smart metering characteristics, the change of the voltage amplitude and phase of the secondary side under PT secondary circuit disconnection of the three-phase three-wire meter was analyzed by phasor diagram method. Then disconnection phase judgment method was gived based on the analysis of voltage changes. Finally, the formula of active power and correction coefficient under various conditions of secondary disconnection were derived.
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Received: 12 November 2019
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| Cite this article: |
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Deng Dezheng,Zhao Ruoyang. Influence analysis of voltage transformer secondary disconnection on three-phase three-wire measurement[J]. Electrical Engineering, 2020, 21(5): 98-102.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2020/V21/I5/98
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2020, Vol. 21 
