Abstract Using ohmic-contact voltmeter to establish line voltage monitoring points for power system status assessment cannot acquire the voltage at some point where the insulation is unable to be destroyed. Comparing to ohmic-contact voltmeter, the non-contact voltage sensor has much more advantages on installation, safty and the inflence of the insulation, and will be the futuer trend of voltage monitoring. This paper analyzes the principle of the traditional non-contact voltage sensor based on electric field coupling, and proposes an improved solution to the problem that the parasitic capacitance between the line and the sensor plate cannot be obtained under the traditional method. Passing through the Butterworth digital high-pass filter and wavelet denoising, the improved sensor uses the new method of topology transformation reconstructing the voltage to be measured. Results of the steady-state response and transient response test show that the improved voltage sensor has good steady-state and transient performance, small amplitude and phase offset, and can well reconstruct the transient voltage waveform, which has practical value.
Jiang Taoran,Liu Xizhe. Non-Contact Voltage Sensor Based on Topology Transformation[J]. Transactions of China Electrotechnical Society, 2019, 34(1): 153-159.
[1] 徐彪, 尹项根, 张哲, 等. 电网故障诊断的分阶段解析模型[J]. 电工技术学报, 2018, 33(17): 4113-4122. Xu Biao, Yin Xianggen, Zhang Zhe, et al. A staged analytical model for power system fault diagnosis[J]. Transactions of China Electrotechnical Society, 2018, 33(17): 4113-4122. [2] 屈星, 李欣然, 宋军英, 等. 考虑配电网调压的综合负荷模型[J]. 电工技术学报, 2018, 33(4): 759-770.Qu Xing, Li Xinran, Song Junying, et al. Composite load model considering voltage regulation of distribution network[J]. Transactions of China Electrotechnical Society, 2018, 33(4): 759-770. [3] 龙毅, 欧阳金鑫, 熊小伏, 等. 基于零序功率变化量的配电网单相高阻接地保护[J/OL]. 电工技术学报, 2018, 33: 1-9[2018-11-14]. https://doi.org/10.19595/ j.cnki. 1000-6753.tces.181057. Long Yi, Ouyang Jinxin, Xiong Xiaofu, et al. Protection principle of single-phase high resistance fault for distribution network based on zero-sequence power variation[J/OL]. Transactions of China Electrotechnical Society, 2018, 33: 1-9[2018-11-14]. https://doi.org/10.19595/j.cnki.1000-6753.tces.181057. [4] Hou Daqing, Roberts J.Capacitive voltage transformer: transient overreach concerns and solutions for distance relaying[C]//Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering, Calgary, Alberta, Canada, 1996: 119-125. [5] 李昊翔. 基于电容分压的电子式电压互感器的研究[D]. 武汉: 华中科技大学, 2011. [6] 高赐威, 罗海明, 朱璐璐, 等. 基于电力系统能效评估的蓄能用电技术节能评价及优化[J]. 电工技术学报, 2016, 31(11): 140-148.Gao Ciwei, Luo Haiming, Zhu Lulu, et al. The energy-saving assessment and optimization of energy storage and electricity utilization technology based on the energy efficiency evaluation of power system[J]. Transactions of China Electrotechnical Society, 2016, 31(11): 140-148. [7] 张之昊, 武建文, 李平, 等. 应用于农村配电网的测量点与补偿点分离式无功补偿设备及其优化配置[J]. 电工技术学报, 2015, 30(3): 205-213. Zhang Zhihao, Wu Jianwen, Li Ping, et al. Reactive power compensation and its optimal allocation with measurement part and compensation part separated in rural power grid[J]. Transactions of China Electrotech-nical Society, 2015, 30(3): 205-213. [8] Zisman W A.A new method of measuring contact potential differences in metals[J]. Review of Scientific Instruments, 1932, 3(7): 367-370. [9] Zhu Ke, Lee W K, Pong P W T. Non-contact capacitive-coupling-based and magnetic-field-sensing-assisted technique for monitoring voltage of overhead power transmission lines[J]. IEEE Sensors Journal, 2017, 17(4): 1069-1083. [10] 谢潇磊, 刘亚东, 孙鹏, 等. 基于电容分压法的配网线路智能电压传感器[J]. 仪器仪表学报, 2016, 17(5): 1000-1009. Xie Xiaolei, Liu Yadong, Sun Peng, et al. Smart voltage sensor of distribution lines based on the capacitive voltage divider[J]. Chinese Journal of Scientific Instrument, 2016, 17(5): 1000-1009. [11] Lawrence D, Donnal J S, Leeb S, et al.Non-contact measurement of line voltage[J]. IEEE Sensors Journal, 2016, 16(24): 8990-8997. [12] Donnal J S, Leeb S B.Noncontact power meter[J]. IEEE Sensors Journal, 2015, 15(2): 1161-1169. [13] 董雷, 张民, 张炜. 基于MATLAB巴特沃斯低通数字滤波器的设计与仿真[J]. 科技视界, 2016(21): 96-97. Dong Lei, Zhang Min, Zhang Wei. Design and Simulation of Butterworth low-pass digital filter based on MATLAB[J]. Science & Technology Vision, 2016(21): 96-97. [14] 孟翼, 邓北星. 基于巴特沃思滤波器的有源电力滤波研究[J]. 电测与仪表, 2007, 44(10): 12-15. Meng Yi, Deng Beixing. The study of Butterworth adaptive filter based payload current filter[J]. Electrical Measurement & Instrumentation, 2007, 44(10): 12-15. [15] 卢广森. 基于改进阈值函数的小波去噪及其优化研究[D]. 昆明: 昆明理工大学, 2017. [16] 胡光书. 现代信号处理教程[M]. 北京: 清华大学出版社, 2004. [17] 蒋行国, 莫少宁, 褚福刚. 基于FPGA的信号小波实时处理方法[J]. 电子技术应用, 2010, 36(12): 45-47. Jiang Xingguo, Mo Shaoning, Chu Fugang. Method of signal wavelet real-time processing based on FPGA[J]. Application of Electronic Technique, 2010, 36(12): 45-47. [18] 刘亚东, 盛戈皞, 王又佳, 等. 基于功率控制法的电流互感器取电电源设计[J]. 电力系统自动化, 2010, 34(3): 70-74. Liu Yadong, Sheng Gehao, Wang Youjia, at el. Current transformer draw-out power supply design based on power-controlled method[J]. Automation of Electric Power Systems, 2010, 34(3): 70-74.
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