双斜率比率制动差动保护计算及仿真验证  

Calculation and Simulation Verification of Double Slope Ratio Restraint Differential Protection

作　　者：张述民 吴小飞 赵华辰 ZHANG Shumin;WU Xiaofei;ZHAO Huachen(PetroChina Lanzhou Petrochemical Company,Lanzhou 730060,China)

机构地区：[1]中国石油兰州石化分公司,甘肃兰州730060

出　　处：《电工技术》2022年第15期197-200,共4页Electric Engineering

摘　　要：双斜率比率制动电流差动保护原理简单,全线速动并具有绝对的选择性,不受系统运行方式、保护范围、时效配合等因素的影响,在变压器、线路保护中得到了广泛应用。通过对差动保护双斜率比率制动特性进行计算以便对保护性能进行了解;通过计算机软件预先设定的系统故障,模拟区内外故障,验证双斜率比率制动电流差动保护参数及配置的正确性,及时发现供电保护缺陷,以达到最优效果,也对以后的供电系统改造提供了一种思路。The principle of double slope ratio restraint current differential protection is simple,and the whole-line fast protection has absolute selectivity.It is not affected by the system operation mode,protection range,time effect coordination and other factors,and has been widely used in transformer and line protection.The double slope ratio restraint characteristics of differential protection are calculated to understand the protection performance.Through the system fault preset by the computer software,the faults inside and outside the area are simulated,the correctness of the parameters and configuration of the double slope ratio restraint current differential protection is verified.It can timely find the power supply protection defects,and achieve the optimal effect.This method also providing an idea for the future power supply system transformation.

关 键 词：双斜率比率制动 差动保护 ETAP 

分 类 号：TM76[电气工程—电力系统及自动化]