35 kV线路单相断线故障实例分析及实用判据  

Case Analysis of the Single-Phase Breakage Fault of the 35 kV Line and the Practical Criterion

作　　者：石庆均 冉波 殷家敏 SHI Qingjun;RAN Bo;YIN Jiamin(Changshou Power Supply Branch of State Grid Chongqing Electric Power Company,Chongqing 401220,P.R.China)

机构地区：[1]国网重庆市电力公司长寿供电分公司,重庆401220

出　　处：《重庆电力高等专科学校学报》2023年第4期1-5,共5页Journal of Chongqing Electric Power College

摘　　要：针对一起35 kV线路单相断线故障实例,利用对称分量法和综合相量法,对电源端35 kV母线及连接Yd11型变压器的负荷端的35 kV、10 kV母线电压异常变化情况进行理论分析,分析结果与现场实际情况一致。提出一种基于电压异常变化特征和SCADA系统接地信号的实用性判据,有助于调控运行人员对类似故障进行分析判断。Based on a single-phase breakage fault of the 35 kV line,the symmetrical component method and the comprehensive phasor method are used to analyze the abnormal voltage variation of the 35 kV busbar at the power end as well as the 35 kV and 10 kV busbars at the load end connected to the Yd11-type transformer.The analytical results are consistent with the actual situation.A practical criterion based on the characteristics of the abnormal voltage variation and the grounding signal of the SCADA system is proposed,which is helpful for regulation and control operators to analyze and judge similar faults.

关 键 词：单相断线故障 对称分量法 综合相量法 电压异常分析 实用性判据 

分 类 号：TM75[电气工程—电力系统及自动化]