电网技术2017，Vol.41Issue(11)：3721-3726,6.DOI:10.13335/j.1000-3673.pst.2017.0093
面向油浸式变压器类绕组暂态电压测量的耦合电容传感器优化设计
Optimization of Coupling Capacitive Sensor for Measurement of Transient Voltage in Oil-Immersed Transformer Type Windings
摘要
Abstract
Researches on transient voltage distribution characteristics of transformer type windings are of great significance for insulation design. Based on 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 application of 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 .关键词
耦合电容传感器/结构尺寸/信号处理电路/截止频率/电缆长度/高频暂态电压Key words
coupling capacitive sensor/structural dimension/signal processing circuit/cut-off frequency/cable length/VFTO分类
信息技术与安全科学引用本文复制引用
倪鹤立,袁炜雄,臧英,程军卫,张健,李原,高萌,丁玉琴,张乔根..面向油浸式变压器类绕组暂态电压测量的耦合电容传感器优化设计[J].电网技术,2017,41(11):3721-3726,6.基金项目
国家电网公司科技项目(SGSD0000JSJS1600027). Project Supported by Science and Technology Project of SGCC (SGSD0000JSJS1600027). （SGSD0000JSJS1600027）
