大电流现场误差检测技术在1000 kV特高压设备上的应用
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摘要
文中针对1 000 kV交流特高压电流互感器误差试验中试验电流达到7 200 A,传统试验方法不满需要的问题,以1 000 kV北京西站特高压电流互感器现场试验为基础,研究了大变比下的升流测试方法,包括:一次大电流回路阻抗特性、无功补偿策略、试验过程设备参数,对试验回路的相关数据进行了计算分析,试验研究发现进行特高压电流互感器误差测试时,必须对一次回路进行有效的无功补偿,才能保证试验的完成;通过试验分析,对于内壁有屏蔽层的电流互感器,一次导体在不同偏心位置时,对误差数据的最大影响达到27%。
In error calibration test of 1 000 kV AC current transformer(CT),the test current is as high as 7 200 A,so traditional test methods are no longer applicable. In this study,taking the test of 1 000 kV AC CT calibration in Beijingxi UHV Substation for example, a current-promoting method with high ratio is proposed, including impendence characteristic, reactive power compensation technique, and equipment parameters in the testing,and the data of the test circuit are analyzed. It is revealed that proper reactive power compensation for primary circuit is necessary to complete the error calibration test, and for the current transformer with shield on its inner wall,the maximum impact of the primary conductor's eccentricity on the error data reaches 27%.
In error calibration test of 1 000 kV AC current transformer(CT),the test current is as high as 7 200 A,so traditional test methods are no longer applicable. In this study,taking the test of 1 000 kV AC CT calibration in Beijingxi UHV Substation for example, a current-promoting method with high ratio is proposed, including impendence characteristic, reactive power compensation technique, and equipment parameters in the testing,and the data of the test circuit are analyzed. It is revealed that proper reactive power compensation for primary circuit is necessary to complete the error calibration test, and for the current transformer with shield on its inner wall,the maximum impact of the primary conductor's eccentricity on the error data reaches 27%.
引文
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[8]冯昊.谐波对电流互感器误差的影响[J].电气技术,2015(8):45-49.FENG Hao.The affect of error of current transformer with harmonics[J].Electrical Engineering,2015(8):45-49.
[9]陈黎来.电流互感器对电能计量的影响[J].电力自动化设备,2011,31(1):138-141.CHEN Lilai.Efect of CT on electric energy measurement[J].Electric Power Automation Equipment,2011,31(1):138-141.
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[15]章述汉,朱跃,吴良科,等.750 kV GIS电流互感器现场检定试验方法[J].高电压技术,2009,35(5):1200-1205.ZHANG Shuhan,ZHU Yue,WU Liangke,et al.Method of on-site calibration test for 750 kV GIS current transformers[J].High Voltage Engineering,2009,35(5):1200-1205.
[16]费烨,王晓琪,章述汉,等.1 000 kV GIS中TA误差试验分析[J].高电压技术,2009,35(5):987-993.FEI Ye,WANG Xiaoqi,ZHANG Shuhan,et al.Test and analysis of error calibration of 1 000 kV GIScurrent transformer[J].High Voltage Engineering,2009,35(5):987-993.
[17]徐敏锐,卢树峰,黄奇峰,等.特高压GIS电流互感器一次检定回路选择及参数测量[J].电子测试,2015(17):50-53.XU Minrui,LU Shufeng,HUANG Qifeng,et al.Selection and parameter measurement of a test circuit for the high voltage GIS current transformer[J].Electronic test,2015(17):50-53.
[18]孙冲,耿建坡,崔海利,等.电流互感器误差测试大电流回路特性及改善方法研究[J].电测与仪表,2012,49(9):58-62.SUN Chong,GENG Jianpo,CUI Haili,et al.Research of current loop impedance and improving m ethod of on-site calibration for current transformers[J].Electrical Measurement&Instrumentation,2012,49(9):58-62.
[19]电能计量装置技术管理规程:DL/T 448-2000[S].2000.Technical administrative code of electric energy metering:DL/T 448-2000[S].2000.
[20]电力互感器检定规程:JJG 1021-2007[S].2007.Instrument Transformers in Power System:JJG1021-2007[S].2007.
[2]闫东,王伟,韩金华,等.特高压套管式电流互感器励磁特性测试[J].高压电器,2010,46(4):1-4.YAN Dong,WANG Wei,HAN Jinhua,et al.Excitation characteristics test of UHV bushing type current transformer[J].High Voltage Apparatus,2010,46(4):1-4.
[3]杨滔,赵克江,刘渝根,等.特高压交流输电线路分裂导线表面电场计算分析[J].高压电器,2015,51(12):6-12.YANG Tao,ZHAO Kejiang,LIU Yugen,et al.Calculation and analysis on surface electric field intensity of bundled conductors for UHVAC transmission line[J].High Voltage Apparatus,2015,51(12):6-12.
[4]肖宾,刘凯,陈磊,等.1 000 kV特高压变电站带电作业绝缘平台研制[J].高压电器,2015,51(12):1-4.XIAO Bin,LIU Kai,CHEN Lei,et al.Investigation on insulating platform for live working in 1 000 kVUHV substation[J].Hish Voltage Apparatus,2015,51(12):1-4.
[5]李璿,吴士普,王晓琪,等.1 000 kV罐式电容式电压互感器附加误差特性分析[J].高压电器,2015,51(9):17-21.LI Xuan,WU Shipu,WANG Xiaoqi,et al.Additional error characteristics study of 1 000 kV tank-type capacitor voltage transformer[J].High Voltage Apparatus,2015,51(9):17-21.
[6]潘峰,申妍华,肖勇,等.电子式电流互感器校验方法研究[J].计量学报,2014,35(2):161-164.PAN Feng,SHEN Yanhua,XIAO Yong,et al.A method for calibration of electronic current transformer[J].Acta Metrologica Sinica,2014,35(2):161-164.
[7]张杰梁.电流互感器磁饱和裕度及其试验装置的探讨[J].电测与仪表,2014,51(15):124-128.ZHANG Jieliang.Discussion on current transformer magnetic saturation margin and its experimental device[J].Electrical Measurement&Instrumentation,2014,51(15):124-128.
[8]冯昊.谐波对电流互感器误差的影响[J].电气技术,2015(8):45-49.FENG Hao.The affect of error of current transformer with harmonics[J].Electrical Engineering,2015(8):45-49.
[9]陈黎来.电流互感器对电能计量的影响[J].电力自动化设备,2011,31(1):138-141.CHEN Lilai.Efect of CT on electric energy measurement[J].Electric Power Automation Equipment,2011,31(1):138-141.
[10]潘洋,林艳,朱力,等.互感器校验仪差流回路负荷对电流互感器检定结果影响的分析与计算[J].电测与仪表,2011,48(6):32-35.PAN Yang,LIN Yan,ZHU Li,et al.The study of current transformer verification result influenced by the differenc-current loop burden of transformer test set[J].Electrical Measurement&Instrumentation,2011,48(6):32-35.
[11]徐家恒,李东,丁宪勤,等.GIS变电站中互感器的误差试验方法[J].高压电器,2009,45(6):128-131.XU Jiaheng,LI Dong,DING Xianqin,et al.Error test methods for transformers in GIS substation[J].High Voltage Apparatus,2009,45(6):128-131.
[12]陈耀高,林玉涵,武坤,等.590G-V2在GIS电流互感器误差测试中的运用[J].电测与仪表,2011,48(1):26-30.CHEN Yaogao,LIN Yuhan,WU Kun,et al.590G-V2work on error test of GIS CT[J].Electrical Measurement&Instrumentation,2011,48(1):26-30.
[13]章述汉,李前,吴良科,等.GIS电流互感器现场检定中的大电流升流方法[J].电测与仪表,2009,46(12):6-8.ZHANG Shuhan,LI Qian,WU Liangke,et al.Highcurrent generating methods for on-site calibration tests of GIS current transformers[J].Electrical Measurement&Instrumentation,2009,46(12):6-8.
[14]吴良科,刘浩,岳长喜,等.大电流互感器现场检定试验中的无功补偿[J].高电压技术,2010,36(6):1560-1566.WU Liangke,LIU Hao,YUE Changxi,et al.Reactive(下转第196页)546power compensation of on-site cal ibration test f or current transf ormers[J].High Voltage Engineering,2010,36(6):1560-1566.
[15]章述汉,朱跃,吴良科,等.750 kV GIS电流互感器现场检定试验方法[J].高电压技术,2009,35(5):1200-1205.ZHANG Shuhan,ZHU Yue,WU Liangke,et al.Method of on-site calibration test for 750 kV GIS current transformers[J].High Voltage Engineering,2009,35(5):1200-1205.
[16]费烨,王晓琪,章述汉,等.1 000 kV GIS中TA误差试验分析[J].高电压技术,2009,35(5):987-993.FEI Ye,WANG Xiaoqi,ZHANG Shuhan,et al.Test and analysis of error calibration of 1 000 kV GIScurrent transformer[J].High Voltage Engineering,2009,35(5):987-993.
[17]徐敏锐,卢树峰,黄奇峰,等.特高压GIS电流互感器一次检定回路选择及参数测量[J].电子测试,2015(17):50-53.XU Minrui,LU Shufeng,HUANG Qifeng,et al.Selection and parameter measurement of a test circuit for the high voltage GIS current transformer[J].Electronic test,2015(17):50-53.
[18]孙冲,耿建坡,崔海利,等.电流互感器误差测试大电流回路特性及改善方法研究[J].电测与仪表,2012,49(9):58-62.SUN Chong,GENG Jianpo,CUI Haili,et al.Research of current loop impedance and improving m ethod of on-site calibration for current transformers[J].Electrical Measurement&Instrumentation,2012,49(9):58-62.
[19]电能计量装置技术管理规程:DL/T 448-2000[S].2000.Technical administrative code of electric energy metering:DL/T 448-2000[S].2000.
[20]电力互感器检定规程:JJG 1021-2007[S].2007.Instrument Transformers in Power System:JJG1021-2007[S].2007.