The phase comparison error is the primary factor leading to mistaken action in the selective leakage protective system of underground LV networks based on zero sequence current direction.
在基于零序电流方向原理的矿井低压电网选择性漏电保护中，比相误差是导致保护误动的主要因素。
Utilizing the regularity of phase difference between period signals, phase processing is made on comparison signals, which reduce effectively quantified error.
这个方法利用了周期性信号间相位差变化的规律性对比对信号进行相位处理，有效地减小了量化误差。
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