通过分析低压隔爆电动机的主要故障类型，针对不对称性短路故障和断相故障提出了采用负序保护原理进行保护的方案。

Based on the analysis of main fault types of LV (Low Voltage) flameproof motor, the negative sequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.

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在结合微机差动保护装置算法及仿真建模的基础上，分析了负相序对差动保护的影响，并给出了相应的处理方法。

Based on the arithmetic of differential protection and simulation technique, this paper analyses the influence of the negative sequence to power system.

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