变压器差动保护动作特性的仿真研究  

Simulation research on the operating characteristic of transformer differential protection

作　　者：宁铎[1] 尤磊[1] 李英春[1] 宋玲芳[1] 尤宝山 

机构地区：[1]陕西科技大学电气与信息工程学院,陕西西安710021 [2]国网宝鸡供电局,陕西宝鸡721001

出　　处：《电力系统保护与控制》2017年第4期99-106,共8页Power System Protection and Control

摘　　要：为了解决工程实际中继电保护装置的测试问题,针对变压器差动保护,利用Matlab软件,在建立单侧电源110 k V双圈变压器简单电力系统模型的基础上,进行变压器微机继电保护装置的仿真分析。探究了励磁涌流与剩磁及合闸初相角之间的关系以及励磁涌流中的谐波含量情况。基于此,采用二三次谐波制动及常规比率制动保护原理,研究了差动保护装置的动作特性。通过对仿真结果的分析,整定保护装置参数,并获取测试数据,用于测试实际继保装置。经实验验证:该方案能够有效进行变压器差动保护装置的测试,具有较好的工程实用性。In order to solve testing issues of protective relaying equipment in actual projects, the simulation is made to analyze the microcomputer-based transformer protective relaying equipment by using MATLAB. For transformer differential protection, the analysis is built based on the 110 k V unilateral power two windings transformer power system model. This paper analyzes the relationship between magnetizing inrush current with remanence and closing initial angle,as well as the situation about harmonic contents in inrush current. In view of this situation, the second or third harmonic restraint principle and general percentage restraint differential protection principle are used to study the operating characteristic of differential protection equipment. According to simulation results analysis, parameters for real device are set. In this way, experimental data tested on actual device are obtained. The experiment results show that this method is effective in testing microcomputer-based transformer protective relaying equipment, proving the practical value.

关 键 词：110 k V变压器 MATLAB/SIMULINK 差动保护 励磁涌流 整定计算 

分 类 号：TM774[电气工程—电力系统及自动化]