基于脉冲源的高频电流传感器传输阻抗测量新方法
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摘要
针对目前点频法在测量局部放电高频电流传感器(HFCT)传输阻抗上的不足,提出一种基于脉冲源的新方法。该方法使用脉冲作为激励信号注入,仅需1次测量即可获得检测频段内的传输阻抗曲线,极大地缩短了测试时间,提高了测试效率,具有操作简便、分辨率高等优点。搭建实验平台测量了多种型号HFCT的传输阻抗,分析了脉冲激励对测量结果的影响,并且将脉冲注入法和点频法进行了对比。实验结果表明:脉冲注入法宜使用上升时间小于10 ns的高斯脉冲作为激励信号,其测量结果与点频法高度一致,两者得到的传输阻抗曲线均值差不超过0.1 V/A,均方根误差小于0.25 V/A,相关系数大于0.85。
Aiming at the shortcomings of the existing single-point frequency method in measuring the transfer impedance of HFCT(High Frequency Current Transformer) with partial discharge,a novel method based on pulse source is proposed. The proposed method adopts a pulse signal as the injecting source and can obtain the transfer impedance curve within the detection band by measuring only once,it greatly reduces the test time,improves the test efficiency,and has the advantages of simple operation and high resolution. An experimental platform is built,and the transfer impedances of various types of HFCTs are measured. Moreover,the influences of pulse signal source on the measurement results are analyzed. Finally,the pulse injection method and the single-point frequency method have been compared. The results show that Gaussian pulse with a rise time shorter than 10 ns should be used as the signal source. The measured transfer impedance curves of the pulse injection method and the single-point frequency method are highly consistent. The mean difference of the transfer impedance curves obtained by the two methods is at most 0.1 V/A,the root mean square error is less than 0.25 V/A,and the correlation coefficient is larger than 0.85.
Aiming at the shortcomings of the existing single-point frequency method in measuring the transfer impedance of HFCT(High Frequency Current Transformer) with partial discharge,a novel method based on pulse source is proposed. The proposed method adopts a pulse signal as the injecting source and can obtain the transfer impedance curve within the detection band by measuring only once,it greatly reduces the test time,improves the test efficiency,and has the advantages of simple operation and high resolution. An experimental platform is built,and the transfer impedances of various types of HFCTs are measured. Moreover,the influences of pulse signal source on the measurement results are analyzed. Finally,the pulse injection method and the single-point frequency method have been compared. The results show that Gaussian pulse with a rise time shorter than 10 ns should be used as the signal source. The measured transfer impedance curves of the pulse injection method and the single-point frequency method are highly consistent. The mean difference of the transfer impedance curves obtained by the two methods is at most 0.1 V/A,the root mean square error is less than 0.25 V/A,and the correlation coefficient is larger than 0.85.
引文
[1]EIGNER A,RETHMEIER K. An overview on the current status of partial discharge measurements on AC high voltage cable accessories[J]. IEEE Electrical Insulation Magazine,2016,32(2):48-55.
[2]WILD M,TENBOHLEN S,GULSKI E,et al. Basic aspects of partial discharge on-site testing of long length transmission power cables[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(2):1077-1087.
[3]江秀臣,蔡军,董小兵,等. 110 k V及以上电压等级交联电缆在线监测技术[J].电力自动化设备,2005,25(8):13-17.JIANG Xiuchen,CAI Jun,DONG Xiaobing,et al. On-line monitoring techniques for 110 kV and above XLPE cable[J]. Electric Power Automation Equipment,2005,25(8):13-17.
[4]朱海钢,冯江,罗俊华. XLPE电力电缆局部放电高频检测技术的研究[J].高电压技术,2004,30(增刊1):75-76.ZHU Haigang,FENG Jiang,LUO Junhua. Study on PD HF detection technology of XLPE power cable[J]. High Voltage Engineering,2004,30(S1):75-76.
[5]TIAN Y,LEWIN P L,DAVIES A E,et al. Partial discharge detection in cables using VHF capacitive couplers[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2003,10(2):343-353.
[6]WOUTERS P A A F,VAN DER LAAN P C T,STEENNIS E F. Inductive ultra-wide band detection and location of partial discharges in high-voltage cables[J]. European Transactions on Electrical Power Engineering,1994,4(3):223-229.
[7]POMMERENKE D,STREHL T,HEINRICH R,et al. Discrimination between internal PD and other pulses using directional coupling sensors an HV cable systems[J]. IEEE Transactions on Dielectrics and Electrical Insulation,1999,6(6):814-824.
[8]KATSUTA G,TOYA A,MURAOKA K,et al. Development of a method of partial discharge detection in extra-high voltage cross-linked polyethylene insulated cable lines[J]. IEEE Transactions on Power Delivery,1992,7(3):1068-1079.
[9]唐炬,李伟,杨浩,等.高压电缆附件局部放电超高频检测与分析[J].高电压技术,2009,35(7):1571-1577.TANG Ju,LI Wei,YANG Hao,et al. Ultra-high frequency detection and analysis for partial discharge in high-voltage cable accessories[J]. High Voltage Engineering,2009,35(7):1571-1577.
[10]郭灿新,张丽,钱勇,等. XLPE电力电缆中局部放电检测及定位技术的研究现状[J].高压电器,2009,45(3):56-60.GUO Canxin,ZHANG Li,QIAN Yong,et al. Current status of partial discharge detection and location techniques in XLPE power cable[J]. High Voltage Engineering,2009,45(3):56-60.
[11]国家电网公司.电力电缆局部放电带电检测设备技术规范:Q/GDW 11224—2014[S].北京:中国电力出版社,2014.
[12]XU Y,GU X,LIU B,et al. Special requirements of high frequency current transformers in the on-line detection of partial discharges in power cables[J]. IEEE Electrical Insulation Magazine,2016,32(6):8-19.
[13]陈孝信,钱勇,许永鹏,等.隧道敷设高压电缆特征导纳模型及局部放电信号幅值分布特性[J].电力自动化设备,2017,37(7):171-177.CHEN XIaoxin,QIAN Yong,XU Yongpeng,et al. Characteristic admittance model and PD amplitude distribution of tunnel-installed high-voltage cables[J]. Electric Power Automation Equipment,2017,37(7):171-177.
[14]国家电网公司.电力设备带电检测仪器技术规范第5部分:高频法局部放电带电检测仪器技术规范:Q/GDW 11304.5—2015[S].北京:中国电力出版社,2015.
[15] JUDD M D,FARISH O. A pulsed GTEM system for UHF sensor calibration[J]. IEEE Transactions on Instrumentation and Measurement,1998,47(4):875-880.
[16] CHEN X,QIAN Y,SHENG G,et al. A time-domain characterization method for UHF partial discharge sensors[J].IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(1):110-119.
[17]陈翔,陈永光,魏明,等.采用法兰同轴法的材料电磁脉冲屏蔽效能时域测试方法[J].高电压技术,2012,38(3):594-600.CHEN Xiang,CHEN Yongguang,WEI Ming,et al. Time domain testing methods of material's shielding effectiveness of electromagnetic pulse using flange coaxial[J]. High Voltage Engineering,2012,38(3):594-600.
[18]HERLEMANN H,KOCH M. Measurement of the transient shielding effectiveness of enclosures using UWB pulses inside an open TEM waveguide[J]. Advances in Radio Science,2007,5(E.2):75-79.
[19]ZHOU Y,QIN Y,CHAPPELL P. Cost-effective on-line partial discharge of measurements for cables[J]. IEEE Electrical Insulation Magazine,2006,22(2):31-38.
[20]赵来军,何俊佳,钱冠军,等.电力变压器局放宽频带传感器的研究[J].高电压技术,2005,31(3):46-47.ZHAO Laijun,HE Junjia,QIAN Guanjun,et al. Research on wide band sensor for PD on-line monitoring[J]. High Voltage Engineering,2005,31(3):46-47.
[21]马翠姣,黄新红,邱毓昌,等.局部放电检测用宽频带电流传感器的探讨[J].高压电器,2001,37(1):24-26.MA Cuijiao,HUNAG Xinhong,QIU Yuchang,et al. Optimization of the wide frequency bandwidth current transducer for PD detection[J]. High Voltage Apparatus,2001,37(1):24-26.
[22]刘明亮,陆福敏,朱江淼,等.现代脉冲计量[M].北京:科学出版社,2010:57-82.
[23]陈孝信,钱勇,盛戈皞,等.基于频域反卷积的局部放电特高频传感器时域参数研究[J].高电压技术,2015,41(5):1488-1494.CHEN Xiaoxin,QIAN Yong,SHENG Gehao,et al. Study of UHF partial discharge sensor time domain parameters based on frequency domain deconvolution[J]. High Voltage Engineering,2015,41(5):1488-1494.
[2]WILD M,TENBOHLEN S,GULSKI E,et al. Basic aspects of partial discharge on-site testing of long length transmission power cables[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(2):1077-1087.
[3]江秀臣,蔡军,董小兵,等. 110 k V及以上电压等级交联电缆在线监测技术[J].电力自动化设备,2005,25(8):13-17.JIANG Xiuchen,CAI Jun,DONG Xiaobing,et al. On-line monitoring techniques for 110 kV and above XLPE cable[J]. Electric Power Automation Equipment,2005,25(8):13-17.
[4]朱海钢,冯江,罗俊华. XLPE电力电缆局部放电高频检测技术的研究[J].高电压技术,2004,30(增刊1):75-76.ZHU Haigang,FENG Jiang,LUO Junhua. Study on PD HF detection technology of XLPE power cable[J]. High Voltage Engineering,2004,30(S1):75-76.
[5]TIAN Y,LEWIN P L,DAVIES A E,et al. Partial discharge detection in cables using VHF capacitive couplers[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2003,10(2):343-353.
[6]WOUTERS P A A F,VAN DER LAAN P C T,STEENNIS E F. Inductive ultra-wide band detection and location of partial discharges in high-voltage cables[J]. European Transactions on Electrical Power Engineering,1994,4(3):223-229.
[7]POMMERENKE D,STREHL T,HEINRICH R,et al. Discrimination between internal PD and other pulses using directional coupling sensors an HV cable systems[J]. IEEE Transactions on Dielectrics and Electrical Insulation,1999,6(6):814-824.
[8]KATSUTA G,TOYA A,MURAOKA K,et al. Development of a method of partial discharge detection in extra-high voltage cross-linked polyethylene insulated cable lines[J]. IEEE Transactions on Power Delivery,1992,7(3):1068-1079.
[9]唐炬,李伟,杨浩,等.高压电缆附件局部放电超高频检测与分析[J].高电压技术,2009,35(7):1571-1577.TANG Ju,LI Wei,YANG Hao,et al. Ultra-high frequency detection and analysis for partial discharge in high-voltage cable accessories[J]. High Voltage Engineering,2009,35(7):1571-1577.
[10]郭灿新,张丽,钱勇,等. XLPE电力电缆中局部放电检测及定位技术的研究现状[J].高压电器,2009,45(3):56-60.GUO Canxin,ZHANG Li,QIAN Yong,et al. Current status of partial discharge detection and location techniques in XLPE power cable[J]. High Voltage Engineering,2009,45(3):56-60.
[11]国家电网公司.电力电缆局部放电带电检测设备技术规范:Q/GDW 11224—2014[S].北京:中国电力出版社,2014.
[12]XU Y,GU X,LIU B,et al. Special requirements of high frequency current transformers in the on-line detection of partial discharges in power cables[J]. IEEE Electrical Insulation Magazine,2016,32(6):8-19.
[13]陈孝信,钱勇,许永鹏,等.隧道敷设高压电缆特征导纳模型及局部放电信号幅值分布特性[J].电力自动化设备,2017,37(7):171-177.CHEN XIaoxin,QIAN Yong,XU Yongpeng,et al. Characteristic admittance model and PD amplitude distribution of tunnel-installed high-voltage cables[J]. Electric Power Automation Equipment,2017,37(7):171-177.
[14]国家电网公司.电力设备带电检测仪器技术规范第5部分:高频法局部放电带电检测仪器技术规范:Q/GDW 11304.5—2015[S].北京:中国电力出版社,2015.
[15] JUDD M D,FARISH O. A pulsed GTEM system for UHF sensor calibration[J]. IEEE Transactions on Instrumentation and Measurement,1998,47(4):875-880.
[16] CHEN X,QIAN Y,SHENG G,et al. A time-domain characterization method for UHF partial discharge sensors[J].IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(1):110-119.
[17]陈翔,陈永光,魏明,等.采用法兰同轴法的材料电磁脉冲屏蔽效能时域测试方法[J].高电压技术,2012,38(3):594-600.CHEN Xiang,CHEN Yongguang,WEI Ming,et al. Time domain testing methods of material's shielding effectiveness of electromagnetic pulse using flange coaxial[J]. High Voltage Engineering,2012,38(3):594-600.
[18]HERLEMANN H,KOCH M. Measurement of the transient shielding effectiveness of enclosures using UWB pulses inside an open TEM waveguide[J]. Advances in Radio Science,2007,5(E.2):75-79.
[19]ZHOU Y,QIN Y,CHAPPELL P. Cost-effective on-line partial discharge of measurements for cables[J]. IEEE Electrical Insulation Magazine,2006,22(2):31-38.
[20]赵来军,何俊佳,钱冠军,等.电力变压器局放宽频带传感器的研究[J].高电压技术,2005,31(3):46-47.ZHAO Laijun,HE Junjia,QIAN Guanjun,et al. Research on wide band sensor for PD on-line monitoring[J]. High Voltage Engineering,2005,31(3):46-47.
[21]马翠姣,黄新红,邱毓昌,等.局部放电检测用宽频带电流传感器的探讨[J].高压电器,2001,37(1):24-26.MA Cuijiao,HUNAG Xinhong,QIU Yuchang,et al. Optimization of the wide frequency bandwidth current transducer for PD detection[J]. High Voltage Apparatus,2001,37(1):24-26.
[22]刘明亮,陆福敏,朱江淼,等.现代脉冲计量[M].北京:科学出版社,2010:57-82.
[23]陈孝信,钱勇,盛戈皞,等.基于频域反卷积的局部放电特高频传感器时域参数研究[J].高电压技术,2015,41(5):1488-1494.CHEN Xiaoxin,QIAN Yong,SHENG Gehao,et al. Study of UHF partial discharge sensor time domain parameters based on frequency domain deconvolution[J]. High Voltage Engineering,2015,41(5):1488-1494.