Optimization of Coupling Capacitive Sensor for Measurement of Transient Voltage in Oil-Immersed Transformer Type Windings

被引：0
|
作者：
Ni H. [1 ]
Yuan W. [1 ]
Zang Y. [2 ]
Cheng J. [2 ]
Zhang J. [3 ]
Li Y. [1 ]
Gao M. [1 ]
Ding Y. [1 ]
Zhang Q. [1 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi Province
[2] Shandong Power Equipment Co., Ltd., Jinan, 250022, Shandong Province
[3] Zaozhuang Branch, State Grid Shandong Electric Power Company, Zaozhuang, 277000, Shandong Province
来源：
Dianwang Jishu/Power System Technology | 2017年 / 41卷 / 11期
关键词：
Cable length; Coupling capacitive sensor; Cut-off frequency; Signal processing circuit; Structural dimension; VFTO;
D O I：
10.13335/j.1000-3673.pst.2017.0093
中图分类号：
学科分类号：
摘要：
Researches on transient voltage distribution characteristics of transformer type windings are of great significance for insulation design. Basedon engineering requirements of non-contact measurement of transient voltage in transformer type windings under oil-immersed conditions, this paper optimized structure and size of coupling capacitive sensor. Response characteristics of the optimized sensor were acquired with different signal processing circuits and both good high and low frequency response characteristics were proved for the optimized coupling capacitive sensor when matching appropriate signal processing circuits, and it is suitable for applicationof measurement of double-exponential impulse (middle/low frequency transient voltage) or high frequency transient voltage (VFTO). Influence of cable length on output signal was also studied. Experiential results indicated that increase of cable length would lead to increase of divider ratio and degradation of both upper and lower cut-off frequency. Short cables are preferred in experiments to improve measurement accuracy. © 2017, Power System Technology Press. All right reserved.
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页码：3721 / 3726
页数：5
相关论文
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