基于拓扑变换的非接触式电压传感器
|
摘要
设立线路电压监测点获取节点电压数据对电力系统运行状态进行评估,若采用接触式电压传感器在某些无法破坏线路绝缘层的节点处将无法获得电压数据。相对于传统电压传感器,非接触式电压传感器具有装卸简便、施工安全性高、不受线路绝缘影响等优势,将成为未来电压测量装置的发展方向。该文对传统电场耦合式非接触电压传感器测量原理进行分析,针对传统方法下线路与极板间寄生电容无法实地求解的问题提出改进方案。改进后的电压传感器通过拓扑变换法获得一系列原始数据,原始数据经Butterworth数字高通滤波、小波降噪后进行寄生电容计算,最终重构待测电压。对基于拓扑变换的非接触式电压传感器进行稳态响应、暂态响应测试,测试结果表明,改进后的电压传感器具有较好的稳态及暂态性能,幅值与相位偏移较小,且能够较好地复现暂态电压波形,具有实用价值。
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.
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.
引文
[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 of1996 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 energysaving 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 Electrotechnical 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-sensingassisted 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.
[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 of1996 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 energysaving 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 Electrotechnical 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-sensingassisted 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.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |