Design of Lightning Monitoring Device Based on Ground Electric Field Instrument

被引：0
|
作者：
Zhu W. [1 ]
Pan W. [1 ]
Zhang J. [1 ]
机构：
[1] College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 05期
关键词：
Common mode interference; Differential electric field sensor; Ground electric field instrument; Lightning monitoring; Phase sensitive detection; Power-line interference;
D O I：
10.13336/j.1003-6520.hve.20190430019
中图分类号：
学科分类号：
摘要：
In view of the weakness of induction current and the serious electromagnetic interference in the electric field instrument at home and abroad, we designed a new type of differential sensor with dual stator structure. Two current signals were sensed by the sensor and they were converted to voltage signals by passing through the I/V converter, and the common mode interference and the power frequency interference were eliminated by subtracting the instrument and the 50 Hz power frequency notch filter. The synchronous signals were obtained by using photoelectric switch sensors, and a phase sensitive detector was used to process the signal to obtain a direct current voltage proportional to the field strength. The experimental results show that the resolution of the system is 10 V/m and linearity is less than 1% in the range of simulated field strength of -50~50 kV/m. The actual measurement results show that the differential double stator structure and the reducer can effectively eliminate the common mode interference, the 50 Hz trap filters can eliminate the power frequency interference, and the high precision amplifier can improve the measuring accuracy of electric field instrument. The system can measure the intensity of the atmospheric electric field in real time and show the curve of the field intensity of the atmosphere, which can provide a necessary basis for lightning monitoring and early warning. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1490 / 1495
页数：5
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