煤矿井下中央变电所内电磁干扰测试及分析

孙继平; 王福增

煤矿井下中央变电所内电磁干扰测试及分析

1.
中国矿业大学(北京)煤炭资源与安全开采国家重点实验室
2.
河北农业大学信息科学与技术学院

基金项目:

国家自然科学基金项目(50674093)

家科技支撑计划项目(2006BAK03B00)

详细信息

中图分类号: TD611.2
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出版历程

Testing and Analyzing of EMI in Central Substation of Coal Mine Underground

1.
State Key Lab. of Coal Resources and Safe Mining of CUMT. Beijing, Beijing 100083, China. 2.College of Information Science and Technology of Agriculture University of Hebei, Baoding 071000, China

摘要

摘要: 通过对煤矿井下中央变电所电磁环境进行测试分析,得出如下结论:(1)中央变电所设备正常运行时,高压开关附近存在低频干扰;(2)中央变电所变压器正常运行时,干扰主要在500 MHz以下,在100 MHz附近产生较大干扰,产生的最大干扰比背景噪声高出40 dB.μV/m左右;(3)中央变电所内开关闭合瞬间会产生较大的电磁干扰,干扰主要在1.5 GHz以下,低频干扰较大,最大值达到193 dB.μV/m;(4)中央变电所设备正常工作时,辐射电磁场达到一级标准(1 V/m);但在开关闭合瞬间,在1 MHz以下电磁干扰较大,超过GB9175—88环境电磁波卫生标准中规定的二级标准。
- 矿井 /
- 中央变电所 /
- 电磁环境 /
- 电磁干扰 /
- 测试
Abstract: Through testing and analyzing electromagnetic environment of central substation of coal mine underground, following conclusions were gotten: 1 There is low-frequency interference nearby high-voltage switch during normal operation of equipments in central substation. 2 When transformers of center substation run normally, the EMI is mainly below 500 MHz and a greater interference appears nearby 100 MHz, and the maximum interference is 40 dB?μV/m higher than background noise or so. 3 When the switch in central substation is taken on or off instantly, there will be a greater EMI which is mainly below 1.5 GHz. The larger interference is in low-frequency and the maximum EMI reaches 193 dB?μV/m. 4 When equipments of central substation are in normal working, radiation of electromagnetic field reaches 1 standard level 1 V/m. But when the switch is taken on or off instantly, the EMI is larger than 2 stardard level of GB9175-88 environmental health standards of electromagnetic waves because the EMI is larger below 1 MHz.
- mine, central substation, electromagnetic environment, EMI, testing /