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| Non-contact Measuring Methods of Transient Conduction Disturbances in Mine |
| FENG De-wang1,2 |
1.Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
2.China University of Mining & Technology, Beijing 100083, China |
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Abstract Transient electromagnetic radiation model of short dipole, in which pulse current is used as its excitation source, can be built based on electromagnetic field theory. Moreover, the transient radiation field was closely bound up with the pulse current of power cable. The transformation model between direct contact measured value and non-contact measured value was built through modeling experiments, and the non-contact measuring method of transient conduction disturbance in mine was advanced. The experimental results in mines show that non-contact measurement method can catch the time domain waveforms of power cable transient radiation in the instant of switching operations. Electric-field strength of the electromagnetic radiation field caused by pulse current may reach up to 4 V/m, which has great effect on electromagnetic environment.
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［1］Trutt F C, Rotithor H G,Kohler J L. A coordination-free ground-fault relay for AC mine distribution systems［J］. IEEE Transactions on Industry Applications, 1989, 25(5): 819-823.
［2］Seshaprasad B J, Peters R R. Investigation of switching transients in 3.3 kV underground mine power systems［J］. Mining Technology, 1997, 79(914): 267-270.
［3］孙继平. 矿井监控与通信设备电磁兼容性试验的严酷等级［J］. 煤炭科学技术, 1999,27(6): 23-24.
［4］孙继平, 潘涛, 田子建. 煤矿井下电磁兼容性探讨［J］. 煤炭学报, 2006,31(3): 377-379.
［5］孙继平,冯德旺,赵振保,等. 矿用线缆电快速瞬变脉冲群骚扰的传输特性［J］. 中国矿业大学学报,2009,38(1):46-49.
［6］孙继平,冯德旺,郑召文,等. 矩形巷道导波特性的等效传输线法分析［J］. 煤炭学报,2008,33(12):1438-1441.
［7］孙继平, 成凌飞. 矩形隧道中电磁波传播模式的分析［J］. 电波科学学报, 2005, 20(4):522-525.
［8］冯德旺.电快速瞬变脉冲群的短偶极子辐射发射模型［J］.电波科学学报, 2010, 25(5):995-999. |
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2012, Vol. 33 
