We focus on the high frequency current method which is widely applied in the partial discharge (PD) detection of cables. Aiming at guaranteeing the accuracy of this method, we study an innovative time-domain technology for e?ectively measuring the transfer impedance of the high frequency current transformers (HFCTs). The proposed technology called pulse injection method obtains the system response under the excitation of the wide-band instantaneous pulse signal. Firstly, by studying the working principle of HFCTs, we summarize that the bandwidth of the selected signal acquisition device should be at least 100MHz to ensure measurement accuracy. Secondly, Gauss pulse and square wave pulse are generated to determine the effects of different sources. The measurement results indicate that Gauss pulse is more suitable for pulse injection method, and the rise time should be under 10 ns to improve the starting frequency of oscillation distortion. Finally, the transfer impedance curves of five types of HFCTs are acquired by both pulse injection and traditional point-frequency methods. The measurement results show a remarkable consistency between two methods. However, pulse injection method requires the simpler operation and has a higher resolution, obviously improving the measurement e±ciency and better displaying the details of the transfer impedance curves.
SONG Simeng (宋思蒙), CHEN Xiaoxin (陈孝信), QIAN Yong (钱勇), WANG Hui (王辉), ZHANG Yue (张悦), SHENG Gehao (盛戈皞), JIANG Xiuchen (江秀臣)
. Research on Time-Domain Transfer Impedance Measurement Technology for High Frequency Current Transformers in Partial Discharge Detection of Cables[J]. Journal of Shanghai Jiaotong University(Science), 2020
, 25(1)
: 10
-17
.
DOI: 10.1007/s12204-020-2154-7
[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] JIANG X C, CAI J, DONG X B, et al. On-line monitoring techniques for 110 kV and above XLPE cable [J].Electric Power Automation Equipment, 2005, 25(8):13-17 (in Chinese).
[4] ZHU H G, FENG J, LUO J H. Study on PD HF detection technology of XLPE power cable [J]. High Voltage Engineering, 2004, 30(136): 75-76 (in Chinese).
[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 on 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] TANG J, LI W, YANG H, 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 (in Chinese).
[10] GUO C X, ZHANG L, QIAN Y, et al. Current status of partial discharge detection and location techniques in XLPE power cable [J]. High Voltage Apparatus, 2009,45(3): 56-60 (in Chinese).
[11] State Grid Corporation of China. Technical specification for on line detection equipment of partial discharge for power cables: Q/GDW 11224-2014 [S].(2014-12-01) [2019-09-06] (in Chinese).
[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] CHEN X X, QIAN Y, XU Y P, 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(in Chinese).
[14] State Grid Corporation of China. Technical specification for energized test device of electrical equipment.Part 5. Technical specification for high-frequency partial discharge detector: Q/GDW 11304.5-2015 [S].(2015-11-07) [2019-09-06] (in Chinese).
[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 X, QIAN Y, SHENG G H, et al. A timedomain characterization method for UHF partial discharge sensors [J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2017, 24(1): 110-119.
[17] CHEN X, CHEN Y G, WEI M, 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 (in Chinese).
[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(2): 75-79.
[19] ZHOU Y F, QIN Y, CHAPPELL P. Cost-e?ective on-line partial discharge of measurements for cables [J].IEEE Electrical Insulation Magazine, 2006, 22(2): 31-38.
[20] ZHAO L J, HE J J, QIAN G J, et al. Research on wide band sensor for PD on-line monitoring [J]. High Voltage Engineering, 2005, 31(3): 46-47 (in Chinese).
[21] MA C J, HUNAG X H, QIU Y C, et al. Optimization of the wide frequency bandwidth current transducer for PD detection [J]. High Voltage Apparatus, 2001,37(1): 24-26 (in Chinese).
[22] LIU M L, LU F M, ZHU J M, et al. Modern pulse metrology [M]. Beijing, China: Science Press, 2010 (in Chinese).
[23] CHEN X X, QIAN Y, SHENG G H, et al. Study of UHF partial discharge sensor time domain parameters based on frequency domain deconvolution [J].High Voltage Engineering, 201, 41(5): 1488-1494 (in Chinese).
