典型的220 kV主变中后备保护动作研究  

Research on Backup Protection Action in Typical 220 kV Main Transformer

作　　者：洪俊宇 张博涵 祝旭焕 雷轶群 文海泉 陈士龙 郭海洋 黄文韬 项锦晔 钱佳莹 HONG Junyu;ZHANG Bohan;ZHU Xuhuan;LEI Yiqun;WEN Haiquan;CHEN Shilong;GUO Haiyang;HUANG Wentao;XIANG Jinye;QIAN Jiaying(Quzhou Power Supply Company of State Grid Zhejiang Electric Power Co.,Ltd.,Quzhou,Zhejiang 324000,China)

机构地区：[1]国网浙江省电力有限公司衢州供电公司,浙江衢州324000

出　　处：《自动化应用》2024年第10期59-61,共3页Automation Application

摘　　要：随着电力负荷及变电站数量的日益增长,保障电力系统的安全稳定运行已成为一项重要的任务,同时也对变电运维人员的异常事故处理能力提出了更高要求。以变电运维人员为出发点,结合一起典型的中压侧配置有间隙保护的220 kV变电站发生的死区故障案例,深入分析死区保护、主变保护、母差保护等继电保护动作及事故处理情况。较详细地分析了单相接地故障情况下的保护配合关系以及该情况下保护动作的特殊性,正确判断了故障点,并通过变电运维事故处理仿真软件验证了分析结果的正确性,为变电运维人员在电力系统事故处理中分析类似保护跳闸事件提供了一定的借鉴。With the increasing power load and the number of substations,ensuring the safe and stable operation of the power system has become an important task,and at the same time,higher requirements have been put forward for the ability of substation operation and maintenance personnel to handle abnormal accidents.This paper takes transformer operation and maintenance personnel as the starting point,combined with a typical dead zone fault case of 220 kV substation equipped with gap protection on the medium voltage side,and makes an in-depth analysis of the relay protection actions and accident handling such as dead zone protection,main transformer protection and mother-difference protection.In this paper,the protection cooperation relationship and the particularity of protection action in the case of single-phase grounding fault are analyzed in detail,the fault point is correctly judged,and the correctness of the analysis results is verified by the simulation software of substation operation and maintenance accident processing,which provides a certain reference for the analysis of similar protection trip events in the power system accident processing of substation operation and maintenance personnel.

关 键 词：变电站 电力系统 间隙保护 死区故障 

分 类 号：TM773[电气工程—电力系统及自动化]