基于零序分量的电网断线故障分析  

Analysis of Broken Line Fault Based on Zero-sequence Component

作　　者：张安琪 ZHANG Anqi(Shantou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Shantou 515041)

机构地区：[1]广东电网有限责任公司汕头供电局,广东汕头515041

出　　处：《电力安全技术》2024年第6期70-75,共6页Electric Safety Technology

摘　　要：当线路发生断线故障时,断线相电流降为0,零序电流上升,零序功率为正方向。因此,基于零序分量的分析,继电保护可准确地识别出断线故障并动作跳闸,从而防止线路非全相运行。以一起断线故障为例,分析零序保护在断线故障中的识别和动作过程,以利于继电保护人员在电网发生跳闸事故时及时做出判断并进行处置。When a broken line fault occurs,the break phase current drops to 0,the zero-sequence current rises,and the zero-sequence power is regarded as a positive direction.Therefore,based on the analysis of zero-sequence component,the relay protection is available to accurately identify the broken line fault and trip,thus preventing the line from open-phase operation.Taking a broken line fault as an example,the identification and action process of zero-sequence protection in the broken line fault are analyzed so as to benefit the relay protection personnel to make timely judgment and disposal of a trip accident in the power grid.

关 键 词：断线故障 零序分量 继电保护 零序保护 

分 类 号：TM726.3[电气工程—电力系统及自动化]