电流互感器饱和导致主变差动保护误动分析

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关键词：电流互感器饱和；主变差动保护；误动

doi：10.3969/J.ISSN.1672-7274.2025.08.023

中图分类号：TM452；TN929.53 文献标志码：A 文章编码：1672-7274（2025）08-0066-03

Analysisof Main Transformer Differential Protection Misoperation Caused byCurrent Transformer Saturation

SU Xinyong，DAI Jiaming，WANG Xiaowei， JIGuoqing，WANG Xuehui （State Grid Inner Mongolia Eastern Power Co.，Ltd.Chifeng Power Supply Company，Chifeng O240oo， China）

Abstract：The saturation state of current transformers can lead to the occurrence of differential protection misoperation faults inmain transformers.Oncethismisoperation fault occurs，itwillafect the stableoperationof the line.Based on this，this article analyzes the main transformer diferential protection misoperationcaused by current transformer saturation，selects a case as the research object to analyze the occurrence processand eror data of the main transformer diferential protection misoperationcaused by currenttransformer saturation，and further proposes measuresand suggestions to deal with the main transformer diferential protection misoperation caused by current transformer saturation，forreference and inspiration.

Keywords： current transformer saturation; main transformer differential protection; maloperation

电流互感器在输配电线路中主要起到测量一次电流的作用，但在传变电流过程中会消耗电流进行铁芯激励，待铁芯磁化后形成感应电流、感应电动势，在特定状况下励磁电流、铁芯磁通之间产生线性关系。（剩余2976字）