T型输电线路三端差动保护工程应用实践  

Application of current differential protection for T connection transmission lines

作　　者：李瑞生 贺要锋 樊占峰 曹丽璐 

机构地区：[1]许继电气股份有限公司,河南许昌461000 [2]许昌供电公司,河南许昌461000

出　　处：《电力系统保护与控制》2010年第6期119-121,125,共4页Power System Protection and Control

摘　　要：T型输电在输电线路中得到了广泛应用。但是T型接线增加了二次继电保护设计和整定的复杂性,现有的常规保护难以适应T型接线的要求。在许昌薛坡-魏都-灞陵110 kV T型输电线路三端差动保护工程实践中,采用三端光纤差动保护作为主保护,利用自适应主从定位方法解决三端数据同步,并保证在任一通道发生故障情况下,不失去差动保护,提出适用于T型输电线路的综合阻抗保护新原理、T型线路故障测距技术、三端差动保护方案及配置。The T connection transmission line is widely applied in transmission line.But the T connection transmission lines increase complexity of relay protection′s design and the setting,the conventional protection is difficult to adapt to the T connection.In the 110 kV T transmission line current differential protection project of Xuchang Xuepo-Weidu-Baling,this paper takes three-terminal current differential protection as the main protection,uses the self-adaptive master-slave location to solve three-terminal data synchronization,and ensures that differential protection will not be lost in any channel fault.It also proposes a new comprehensive impedance protection principle,a new T connection lines fault location technology,and three-terminal differential protection scheme and the configuration to suit T transmission line.

关 键 词：T型接线 三端差动保护 自适应主从定位 应用实践 

分 类 号：TM773[电气工程—电力系统及自动化]