A New Method of Using Pulse Broadening to Realize Selective Leakage Protection in Coal Mine
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摘要: 针对煤矿井下电网选择性漏电保护动作的可靠性问题,提出了一种采用脉冲展宽实现零序电流方向选择性漏电保护的硬件电路。在网压660 V实验台上的实验和TEK DPO2014示波器的波形表明,提出的电路正确、可靠。采用该电路实现的漏电保护装置在煤矿井下取得了成功应用。Abstract: In order to improve the reliability of selective leakage protection of power network in mine, a hardware circuit using pulse broadening to realize selective leakage protection of zero-sequence current direction was proposed. Its test on 660 V test device and waveform on TEK DPO2014 oscilloscope proved that the proposed circuit is correct and reliable. Leakage protection devices with the proposed circuit have been successfully applied in coal mines.
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