摘要:
为了说明煤矿井下检漏保护装置远方试验的必要性,应用分布参数电路理论分析井下供电系统,为该必要性找到理论支撑。通过对比分析实际选择性检漏保护装置就地和远方试验交流等效电路,计算出试验电流,并与实测值进行了对比,发现就地试验采用3~5 kΩ左右较小阻值,远方试验采用11 kΩ较大阻值进行试验,才能确保选择性检漏保护装置在整个动作电阻范围内的可靠性;通过对比分析附加直流源检漏保护装置就地和远方试验直流等效电路,发现就地和远方试验的过渡过程明显不同,并分析了就地和远方试验工作环境的差异性等。结论是远方试验与就地试验一样十分必要,改进远方试验方法,实现井上下联网就地试验和远方试验,井下漏电保护系统可靠性将会大大提高。
Abstract:
In order to provide theoretical support for the necessity of remote manual leakage tripping test, the distributed parameter circuit theory is applied to analyze the underground power supply system. By comparing and analyzing the AC equivalent circuit of actual selective leak detection protection device in situ, and with remote manual leakage, the test current is calculated and compared with the measured value. It is found that in situ test with smaller resistance about 3 kΩ to 5 kΩ and the distance test with larger resistance test of 11 kΩ can ensure the reliability of the selective leak detection protection device in the whole range of action resistance. By comparing and analyzing additional DC source leak detection protection device in the situ test and DC equivalent circuit for remote test, it is found that the transition process of the additional DC source leak detection protection device is obviously different from that of the remote test, and the difference of working environment between on-site test and remote test is analyzed. The conclusion is that the remote test is as necessary as the on-site test, and the reliability of the underground leakage protection system will be greatly improved by improving the remote test method and realizing the up-down and down-connected local test and remote test.
百度学术
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