The fixed value calculation and setting of relay protection is an essential part of the relay protection work. Based on the study of the relay protection of distribution system and computer integrated protection devices, this paper gives practical calculation basis.%继电保护定值计算和整定是继电保护工作中的一项必不可少的内容。本文根据对配电系统继电器保护和微机综合保护装置的研究，给出了实用的计算依据。
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