基于开合式电容传感方法的电压互感器误差带电校验系统
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摘要
为了保证电压互感器的准确度和可靠性,需要对其进行准确度校验。传统校验方式定期进行,需要线路停电,周期较长,无法及时发现互感器存在的问题。针对这种情况,文中提出了一种基于开合式电容传感方法的电压互感器误差带电校验系统,利用采用两个开合式电容器及其他辅助器件构成的电压传感器作为标准传感器,利用两开合式电容器输出相互比对的形式实现传感器准确度自检,并利用其输出的平均值作为最终输出,大大提高了校验准确度及可靠性。测试结果证明该带电校验系统在额定电压的20%～120%范围内,比差变化小于0.037%,角差变化小于0.45′。
To ensure the accuracy and reliability of a voltage transformer,it is necessary to calibrate its accuracy.However,the traditional calibration method needs to be carried out periodically in the condition of outage,and some-times it cannot find transformer's fault due to longer calibration time. In view of the fact,this paper proposes a volt-age transformer error online calibration system based on the open-closed capacitor sensing method. In this method,two open-closed capacitors and other auxiliary devices are used to compose a voltage sensor,and it is taken as the standard sensor. The outputs of the two open-closed capacitors are compared with each other to achieve self-test of sensor accuracy,and the average value of the outputs is used as the final output. Hence,the accuracy and reliability of the calibration are greatly improved. Test results show that the present system works within 20%～120% of the rated voltage,the variation of the ratio error is less than 0.037%,and the variation of the phase error is less than 0.45′.
To ensure the accuracy and reliability of a voltage transformer,it is necessary to calibrate its accuracy.However,the traditional calibration method needs to be carried out periodically in the condition of outage,and some-times it cannot find transformer's fault due to longer calibration time. In view of the fact,this paper proposes a volt-age transformer error online calibration system based on the open-closed capacitor sensing method. In this method,two open-closed capacitors and other auxiliary devices are used to compose a voltage sensor,and it is taken as the standard sensor. The outputs of the two open-closed capacitors are compared with each other to achieve self-test of sensor accuracy,and the average value of the outputs is used as the final output. Hence,the accuracy and reliability of the calibration are greatly improved. Test results show that the present system works within 20%～120% of the rated voltage,the variation of the ratio error is less than 0.037%,and the variation of the phase error is less than 0.45′.
引文
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[14]李振华,李闯,李振兴,等.数字量输出电子式电压互感器的高精度在线校验方法[J].电力系统自动化,2015,39(13):163-167.LI Zhenhua,LI Chuang,LI Zhenxing,et al.High precision on line calibration method for digital output electronic voltage transformer[J].Automation of Electric Power Systems,2015,39(13):163-167.
[15]王黎明,杜镇安.用于高压输电线路现场带电校验的开口式双气隙铁心结构电子式电流互感器[J].高电压技术,2015,41(1):106-114.WANG Liming,DU Zhen’an.Double air-gap current transformer applied to high voltage tansmission line on-site mobile comparison system[J].High Voltage Engineering,2015,41(1):106-114.
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[17]肖波,徐敏捷,席朝辉,等.高压侧感应取能电源的研究[J].高压电器,2013,49(1):1-5.XIAO Bo,XU Minjie,XI Zhaohui,et al.Research of induction power supply at high voltage side[J].High Voltage Apparatus,2013,49(1):1-5.
[18]黄新波,石杰,陈小雄,等.基于互感取能的导线监测传感器电源设计[J].高压电器,2014,50(9):16-22.HUANG Xinbo,SHI Jie,CHEN Xiaoxiong,et al.Design of mutual inductance-based power supply for conductor monitoring sensor[J].High Voltage Apparatus,2014,50(09):16-22.
[19]王静丽,武可,金光耀,等.智能电网监控装置取能方法研究[J].高压电器,2014,50(9):94-99.WANG Jingli,WU Ke,JIN Guangyao,et al.Power supply methods research on the smart grid monitoring device[J].High Voltage Apparatus,2014,50(9):94-99.
[20]刘亚东,盛戈皞,王葵,等.基于相角控制法的电流互感器取电电源设计[J].电力系统自动化,2011,35(19):72-76.LIU Yadong,SHENG Gehao,WANG Kui,et al.A new design of current transformer energy harvesting power supply based on phase angle control method[J].Automation of Electric Power Systems,2011,35(19):72-76.
[21]熊兰,何友忠,宋道军,等.输变电线路在线监测设备供电电源的设计[J].高电压技术,2010,36(9):2252-2257.XIONG Lan,HE Youzhong,SONG Daojun,et al.Design on power supply for the transmission line on-line monitoring equipment[J].High Voltage Engineering,2010,36(9):2252-2257.213
[2]温海燕,雷林绪,张朝阳,等.基于普克尔效应的光学电压互感器的设计和实验[J].电网技术,2013,37(4):1181-1184.WEN Haiyan,LEI Linxu,ZHANG Chaoyang,et al.Design and experimental research of pockels effect based optical voltage transducer[J].Power System Technology,2013,37(4):1181-1184.
[3]冯宇,谢超,王玲,等.电子式电压互感器谐波传变特性分析[J].高压电器,2014,50(11):97-102.FENG Yu,XIE Chao,WANG Ling,et al.Analysis on harmonic transfer characteristics of electronic voltage transformers[J].High Voltage Apparatus,2014,50(11):97-102.
[4]肖霞,徐雁,叶妙元.电子式电压互感器中的相位补偿研究[J].高压电器,2010,46(3):41-44.XIAO Xia,XU Yan,YE Miaoyuan.Phase compensation scheme for electronic voltage transformer[J].High Voltage Apparatus,2010,46(3):41-44.
[5]赵一男,张国庆,王贵忠,等.220 kV自愈式光学电压互感器研制[J].高电压技术,2013,39(5):1135-1141.ZHAN Yinan,ZHANG Guoqing,WANG Guizhong,et al.Developmentof220kVself-healingopticalvoltagetransducer[J].High Voltage Engineering,2013,39(5):1135-1141.
[6]周强,何为,李松浓,等.单级电容式电压互感器的试验研究[J].高电压技术,2016,42(6):1781-1789.ZHOU Qiang,HE Wei,LI Songnong,et al.Experimental research of unipolar capacitive voltage transformer[J].High Voltage Engineering,2016,42(6):1781-1789.
[7]张杰,胡媛媛,刘飞,等.高压直流互感器现场校验关键技术[J].高电压技术,2016,42(9):3003-3010.ZHANG Jie,HU Yuanyuan,LIU Fei,et al.Critical technology of on-site calibration system for dc electronic instrument transformer[J].High Voltage Engineering,2016,42(9):3003-3010.
[8]任稳柱,杨忠州,胡新明,等.电子式电流互感器暂态误差的试验系统研究[J].高压电器,2013,49(1):54-57.REN Wenzhu,YANG Zhongzhou,HU Xinming,et al.Introduction to a test system of instantaneous error of electronic current transformer[J].High Voltage Apparatus,2013,49(1):54-57.
[9]任稳柱,袁渊,杨忠州,等.电子式互感器稳态误差校验技术的研究[J].高压电器,2011,47(4):64-68.REN Wenzhu,YUAN Yuan,YANG Zhongzhou,et al.Steady-state error calibration technology for electronic instrument transformer[J].High Voltage Apparatus,2011,47(4):64-68.
[10]唐毅,李振华,江波,等.基于IEC 61850-9的电子式互感器现场校验系统[J].高电压技术,2014,40(8):2353-2359.TANG Yi,LI Zhenhua,JIANG Bo,et al.On-site calibration system for electronic transformers based on IEC61850-9[J].High Voltage Engineering,2014,40(8):2353-2359.
[11]李振华,李红斌,张秋雁,等.一种高压电子式电流互感器在线校验系统[J].电工技术学报,2014,29(7):229-236.LI Zhenhua,LI Hongbin,ZHANG Qiuyan,et al.An online calibration system for high voltage electronic current transformers[J].Transactions of China Electrotechnical Society,2014,29(7):229-236.
[12]胡浩亮,李前,卢树峰,等.电子式互感器误差的两种校验方法对比[J].高电压技术,2011,37(12):3022-3027.HU Haoliang,LI Qian,LU Shufeng,et al.Comparision of two electronic transformer error measuring methods[J].High Voltage Engineering,2011,37(12):3022-3027.
[13]肖勇,潘峰,孙卫明.电子式电压互感器校验方法[J].武汉大学学报,2014,47(3):350-353.XIAO Yong,PAN Feng,SUN Weiming.A method for calibration of electronic voltage transformer[J].Engineering Journal of Wuhan University,2014,47(3):350-353.
[14]李振华,李闯,李振兴,等.数字量输出电子式电压互感器的高精度在线校验方法[J].电力系统自动化,2015,39(13):163-167.LI Zhenhua,LI Chuang,LI Zhenxing,et al.High precision on line calibration method for digital output electronic voltage transformer[J].Automation of Electric Power Systems,2015,39(13):163-167.
[15]王黎明,杜镇安.用于高压输电线路现场带电校验的开口式双气隙铁心结构电子式电流互感器[J].高电压技术,2015,41(1):106-114.WANG Liming,DU Zhen’an.Double air-gap current transformer applied to high voltage tansmission line on-site mobile comparison system[J].High Voltage Engineering,2015,41(1):106-114.
[16]程显,廖敏夫,段雄英,等.采用电网高压母线负载电流供能的光控真空开关模块操动机构电源设计[J].高电压技术,2011,37(8):2073-2080.CHENG Xian,LIAO Minfu,DUAN Xiongying,et al.Designment of operation mechanism power supply with fiber-controlled vacuum switch module applying energy supply provided by high voltage bus current[J].High Voltage Engineering,2011,37(8):2073-2080.
[17]肖波,徐敏捷,席朝辉,等.高压侧感应取能电源的研究[J].高压电器,2013,49(1):1-5.XIAO Bo,XU Minjie,XI Zhaohui,et al.Research of induction power supply at high voltage side[J].High Voltage Apparatus,2013,49(1):1-5.
[18]黄新波,石杰,陈小雄,等.基于互感取能的导线监测传感器电源设计[J].高压电器,2014,50(9):16-22.HUANG Xinbo,SHI Jie,CHEN Xiaoxiong,et al.Design of mutual inductance-based power supply for conductor monitoring sensor[J].High Voltage Apparatus,2014,50(09):16-22.
[19]王静丽,武可,金光耀,等.智能电网监控装置取能方法研究[J].高压电器,2014,50(9):94-99.WANG Jingli,WU Ke,JIN Guangyao,et al.Power supply methods research on the smart grid monitoring device[J].High Voltage Apparatus,2014,50(9):94-99.
[20]刘亚东,盛戈皞,王葵,等.基于相角控制法的电流互感器取电电源设计[J].电力系统自动化,2011,35(19):72-76.LIU Yadong,SHENG Gehao,WANG Kui,et al.A new design of current transformer energy harvesting power supply based on phase angle control method[J].Automation of Electric Power Systems,2011,35(19):72-76.
[21]熊兰,何友忠,宋道军,等.输变电线路在线监测设备供电电源的设计[J].高电压技术,2010,36(9):2252-2257.XIONG Lan,HE Youzhong,SONG Daojun,et al.Design on power supply for the transmission line on-line monitoring equipment[J].High Voltage Engineering,2010,36(9):2252-2257.213
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