技术与应用
电压互感器二次断线对三相三线计量的影响分析
邓得政1 , 赵若阳2
1. 国网天津东丽供电公司,天津 300300;
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;
摘要 本文结合智能电表计量特性,利用相量图法分析了电压互感器二次回路断线时接入三相三线电能表的二次侧电压幅值和相位的变化,并在此基础上提出了断线相的判别方法,推导了二次断线各种情况下的有功计量公式及更正系数的计算公式。
关键词 ：
二次回路断线 ,
三相三线 ,
电压变化
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.
Key words ：
secondary circuit disconnection
three-phase three-wire meter
voltage changes
收稿日期: 2019-11-12
作者简介 : 邓得政（1992-）,男,硕士,工程师,主要从事电能计量与用电信息采集工作。
引用本文:
邓得政, 赵若阳. 电压互感器二次断线对三相三线计量的影响分析[J]. 电气技术, 2020, 21(5): 98-102.
Deng Dezheng, Zhao Ruoyang. Influence analysis of voltage transformer secondary disconnection on three-phase three-wire measurement. Electrical Engineering, 2020, 21(5): 98-102.
链接本文:
http://dqjs.cesmedia.cn/CN/Y2020/V21/I5/98
[1] 王海涛, 胡元璐. 基于用电信息采集系统的电能表失压断相后电量追补的分析[J]. 电气技术, 2017, 18(8): 56-58, 64.
2020, Vol. 21 
