某电厂220kV主变压器继电保护配置与整定计算  

Relay Protection Configuration and Setting Calculation of 220 kV Main Transformer in a Power Plant

作　　者：雷富坤 朱黎[1] LEI Fukun;ZHU Li(Yunnan Vocational Institute of Energy Technology,Qujing,Yunnan 655001,China)

机构地区：[1]云南能源职业技术学院,云南曲靖655001

出　　处：《自动化应用》2025年第4期139-143,共5页Automation Application

基　　金：中国煤炭教育协会教育教学改革项目(ZMZB20220011);云南省教育厅科学研究基金项目(2023J1832)。

摘　　要：结合某火电厂工程实际,分析了220kV变压器可能存在的故障,明确差动保护主要反应区内故障,而区外的母线及出线故障则由后备保护反应。完成主变继电保护配置并给出整定计算方案,然后基于标幺值法计算系统不同运行方式下的短路电流,对主变压器差动保护、相间短路故障和接地故障的后备保护进行整定计算得到了保护定值,并依据不同保护之间的配合得到动作时间。Based on the actual project of a thermal power plant,the possible faults of the 220 kV transformer were analyzed,and it was clarified that the differential protection mainly reacts to the internal fault of the transformer,while the bus and outgoing line faults outside the area are reacted by the backup protection.The configuration of the transformer relay protection was completed and the calculation scheme for the setting was given.Then,based on the standardized value method,the short-circuit current in different operating modes of the system was calculated,and the differential protection,phase-to-phase short-circuit fault protection,and ground fault backup protection of the transformer were calculated and determined the protection values.Based on the coordination between different protection schemes,the action time was obtained.

关 键 词：变压器 继电保护 整定计算 短路计算 

分 类 号：TM774[电气工程—电力系统及自动化]