Non-contact measurement of lightning current in transmission line based on differential loop

被引：3
作者：
Yao, Chen-Guo [1 ]
Xiao, Qian-Bo [2 ]
Long, Yi [1 ]
Li, Cheng-Xiang [1 ]
Sima, Wen-Xia [1 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment and System Safety and New Technology, Chongqing University
[2] Power Science Research Institute, Chongqing Electric Power Corporation
来源：
Gaodianya Jishu/High Voltage Engineering | 2012年 / 38卷 / 01期
关键词：
Differential loop; Finite-different time-domain(FDTD); Lightning current; Non-contact; Transient magnetic field; Transmission line;
D O I：
10.3969/j.issn.1003-6520.2012.01.007
中图分类号：
学科分类号：
摘要：
Measurement of lightning current is essential for lightning protection in grid, because only if accurate amplitude and waveform of the lightning current is obtained can the correct lightning protection measures be taken. However, in high voltage power systems, it is almost impossible to directly measure the lightning currents accurately and safely. We put forward a contactless lightning current sensor for transmission tower based on the differential loop which has been widely used in the pulse power measurement technique, and it could measure the lightning current on overhead transmission lines contactless. Moreover, we introduced the principle of differential loop for measuring lightning current and the design of the detector. In laboratory, the lightning current was simulated by a high impulse current generator. The experimental results showed that the sensor can accurately reproduce the waveform and amplitude of the current generated by the high impulse current generator, based on a specific measuring distance under reasonable design. And this sensor has the advantages of safety, strong anti-interference ability, and good linearity and accuracy. To analyze propagation characteristics of the lightning transient magnetic field, a 3D model of transmission line struck by lightning was established. The results showed that the transient magnetic field around the tower can reproduce the waveform and the amplitude of the current on the wires when the transmission line is stoked. So the lightning measurement method based on the differential loop is feasible.
引用
收藏
页码：43 / 51
页数：8
相关论文
共 21 条
  • [1] Chen W.-J., Chen J.-H., Gu S.-Q., Et al., Key technologies of lightning detection and protection in China power grid, High Voltage Engineering, 34, 10, pp. 2009-2015, (2008)
  • [2] Li Y.-F., Sima W.-X., Chen L., Et al., Law between parameters of lightning current and elevation based on lightning detection data, High Voltage Engineering, 37, 7, pp. 1634-1643, (2011)
  • [3] Li J.-Q., Shen S.-H., Liao R.-J., Et al., Analysis of the lightning current amplitude change characteristics in Chongqing area, High Voltage Engineering, 36, 12, pp. 2918-2923, (2010)
  • [4] Shu H.-C., Cao P.-L., Zhang G.-B., Et al., Electromagnetic analysis of shielding failure in ±800 kV DC transmission line in the aspect of acquiring lightning parameters, High Voltage Engineering, 37, 5, pp. 1203-1215, (2011)
  • [5] Chen J.-L., Yao X.-L., Development on Rogowski coil for measuring 10/350 μs direct lightning current, High Voltage Engineering, 36, 10, pp. 2412-2416, (2010)
  • [6] Wu C.-Q., Ding L., He H.-X., Et al., Spatial and temporal distribution characteristics of lightning activity of Hunan power grid, High Voltage Engineering, 36, 4, pp. 932-938, (2010)
  • [7] Sun P., Statistical analysis on lightning current amplitude measurement on 220 kV Xin-Hang line, Electric Power, 33, 3, pp. 72-75, (2000)
  • [8] Wang J.-F., Tang X.-Z., Qin H.-S., The research on measurement of lightning current using magnetic tape, High Voltage Engineering, 19, 1, pp. 65-68, (1993)
  • [9] Wang J.-F., Mao X.-H., Yang W.-B., Et al., The method and mechanism of measuring directly the lightning supreme steepness using tape, Proceeding of the CSEE, 26, 6, pp. 162-166, (2006)
  • [10] Chen J.-H., Zhang Q., Feng W.-X., Et al., Lightning location system and lightning detection network of China power grid, High Voltage Engineering, 34, 3, pp. 425-431, (2008)
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