EFT/B interference transmission model and method of anti-interference in a coal mine monitoring substation  

作　　者：MA Fengying 

机构地区：[1]College of Electronic Information and Control Engineering, Shandong Institute of Light Industry, Jinan 250100, China [2]State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100083, China

出　　处：《Mining Science and Technology》2010年第3期391-394,399,共5页矿业科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.50674093);the Pingdingshan Coal Co.Ltd. The EMI distribution measurements were obtained from several coal mines of the Pingdingshan Coal Co.

摘　　要：Coal mining monitoring system has been enforcing tests for the immunity of Electromagnetic Compatibility(EMC) since 2006.However,not all monitoring substations can pass the Electrical Fast Transient/Burst(EFT/B) immunity test and the explosion-proof test simultaneously.In order to enhance EMC,the EFT/B interfere transmission model was presented at the substation power port,after the EFT/B test method was used to analyze the monitoring substation power ports.Hence,a low-pass filter was designed by using the simulation software PIPICE and an anti-jamming method was proposed by way of a parallel connection of the discharge interfere circuit and the low-pass filter.The improved complex EMI filter was made up of an interference discharge device and a filter.The dynamic equivalent circuit was proposed for the EFT/B immunity test.As a result,the monitoring substation has passed the EFT/B immunity and explosion-proof tests with the complex filter.It is concluded that the complex EMI filter has significantly enhanced the immunity of the coal mining monitoring system.Coal mining monitoring system has been enforcing tests for the immunity of Electromagnetic Compatibility（EMC） since 2006.However,not all monitoring substations can pass the Electrical Fast Transient/Burst（EFT/B） immunity test and the explosion-proof test simultaneously.In order to enhance EMC,the EFT/B interfere transmission model was presented at the substation power port,after the EFT/B test method was used to analyze the monitoring substation power ports.Hence,a low-pass filter was designed by using the simulation software PIPICE and an anti-jamming method was proposed by way of a parallel connection of the discharge interfere circuit and the low-pass filter.The improved complex EMI filter was made up of an interference discharge device and a filter.The dynamic equivalent circuit was proposed for the EFT/B immunity test.As a result,the monitoring substation has passed the EFT/B immunity and explosion-proof tests with the complex filter.It is concluded that the complex EMI filter has significantly enhanced the immunity of the coal mining monitoring system.

关 键 词：coal mining monitoring system EXPLOSION-PROOF electrical fast transient/burst complex filter 

分 类 号：TN713[电子电信—电路与系统] TD676[矿业工程—矿山机电]