输电线路纵联电流差动保护仿真设计

Simulation Design of Longitudinal Current Differential Protection for Transmission Lines

目前,电流差动保护在高压线路已经被广泛采用,但其投入使用前必须要进行严格的实验才能保证系统的安全和稳定。由于物理实验很难模拟高压环境,所以使用计算机仿真极为重要。基于Matlab/Simulink建立了仿真系统,实现了系统和纵联电流差动保护的模拟,最后建立了人机交互界面,通过人机交互界面可以直接设定系统参数和故障类型,并进行仿真得到仿真结果,对课堂教学和理论研究有着较大意义。

At present,the current differential protection of high voltage line has been widely used.But before its using,conduct rigorous experiments must be done,to guarantee the security and stability of the system.Due to physical experiments cannot be simulated ambient pressure,the computer simulation is extremely important.Simulation system design includes three parts,system simulation,action simulation and human-computer interaction interface.Simulation of system makes use of Matlab software to build power transmission line model,and simulates various fault types.Actions simulation is mainly based on the principle of current comparison pilot protection,so the system model can be edit and simulation of actions under various fault types can be done.Human and computer Interactive interface design is completed by GUI of Matlab software,system parameters an fault type can be set via the interactive interface,and the result is obtained by simulation.Design of simulation system,verify the reliability of the Current comparison pilot protection.