The Design of the Sensor in Electronic Voltage Transformer

被引：0
|
作者：
Zhao, Zhimin [1 ]
Lin, Xiangning [2 ]
Bo, Zhiqian [3 ]
机构：
[1] Pingdingshan Univ, Coll Elect Informat Engn, Pingdingshan 467000, Peoples R China
[2] Huazhong Univ Sci & Technol, Elect Power Secur & High Efficiency Lab, Wuhan 430074, Peoples R China
[3] AREVA T&D Automat & Informat Syst, Stafford ST17 4LX, England
来源：
2009 IEEE POWER & ENERGY SOCIETY GENERAL MEETING, VOLS 1-8 | 2009年
关键词：
Polytetrafluoroethylene; flexible printed circuit board; electronic voltage transformers; equivalent capacitor; IEC60044-7;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A sensor of Electronic Voltage Transformer (EVT) was designed for the purpose of measurement in the medium/low voltage grids. Among which, a metal electrode was fixed into the center of a Polytetrafluoroethylene (PTFE) cylinder, and stuck a double-sided Flexible Printed Circuit Board (FPCB) on the cylinder surface. With this arrangement, the metal electrode, the PTFE cylinder and the double-sided FPCB constituted two equivalent capacitors which acted as a capacitive voltage divider. The emphasis of the design was laid on the structure and the size of the capacitive voltage divider. Using FPCB, a pre-amplifier and a filter were installed inside the senor to improve the ratio of Signal-to-Noise. Compared with the EVTs used in the high-voltage grids, conventional SF6 gas insulating materials was replaced by PTFE to improve the stability of the measurement system. Further, the operation and maintenance costs of EVTs could be reduced.
引用
收藏
页码：1343 / +
页数：2
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