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本文针对煤矿井下过流保护的现状，提出了研究智能负序过流保护器的可能性和必要性，介绍了其原理、构造及优点。
In this paper, according to the status quo of coal mine overcurrent protection, the possibility and necessity of studying intelligent negative sequence overcurrent protector are put forward. The principle, structure and advantages are introduced.