一起外线路故障引起发电机跳闸事件原因分析

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摘  要：以一起某电厂110 kV外线路接地故障引起的全厂发电机跳闸事件为例，分别从保护装置动作记录、波形回放、理论分析等方面深入分析该次跳闸事件的原因以及暴露出来的问题，并根据某电厂系统运行实际情况制定相应的防范措施，为分析、防范此类跳闸事件提供参考。

关键词：线路故障；波形回放；过激磁；差动保护；发电机跳闸；孤岛运行；防范措施

中图分类号：TM412      文献标志码：A          文章编号：2095-2945（2024）28-0143-06

Abstract： Taking a plant generator tripping event caused by a ground fault on an external 110 kV line in a power plant as an example， the causes of this tripping event and the exposed problems are analyzed in depth from aspects such as protection device action recording， waveform playback， and theoretical analysis. Correspondent waterlogging preventive measures are formulated based on the actual operation conditions of a power plant system to provide reference for analyzing and preventing such tripping events.

Keywords： line fault; waveform playback; over-excitation; differential protection; generator tripping; island operation; preventive measure

发电机作为电厂的主要发电设备，其安全运行对保证电力系统的正常工作和电能质量起着决定性的作用。（剩余5655字）