电力线路相间故障的继电保护研究  

Research on Relay Protection for Interphase Faults in Power Lines

作　　者：李美蓉 Li Meirong(Liaocheng Power Supply Company,State Grid Shandong Electric Power Company,Liaocheng 252000,China)

机构地区：[1]国网山东省电力公司聊城供电公司,聊城252000

出　　处：《办公自动化》2024年第19期79-81,共3页Office Informatization

摘　　要：交流过电流继电器和瞬时过电流继电保护是电网系统最常用的继电保护,用于防止高压电力线路中的相间故障。该保护装置也用于防止电源变压器的外部短路故障。目前,对于电力供应的连续性和安全性要求不断提高,所以,对继电保护装置的性能、选择性和灵敏度的要求也增加,电力系统元件继电保护整定的协调对电网系统的正常运行具有重要意义。文章研究最常用的导体截面的电缆线路和16MVA、25MVA、31.5MVA和40MVA的电力变压器的相间故障继电保护设置的协调。AC overcurrent relay and instantaneous overcurrent relay protection are the most commonly used relay protection in power grid systems to prevent interphase faults in high-voltage power lines.This protection device is also used to prevent external short-circuit faults of the power transformer.At present,the requirements for the continuity and safety of power supply are constantly increasing,so the requirements for the performance,selectivity,and sensitivity of relay protection devices are also increasing.The coordination of relay protection settings for power system components is crucial for the normal operation of the power grid system.This paper investigates the coordination of interphase fault relay protection settings for the most commonly used conductor cross-section cable lines and 16MVA,25MVA,31.5MVA,and 40MVA power transformers.

关 键 词：相间故障 继电保护 协调控制 灵敏度 

分 类 号：TM77[电气工程—电力系统及自动化]