输电线路电流保护仿真实验软件设计

由于电流保护简单、经济、可靠,因而在电力系统中被广泛应用。但对高校刚刚学习继电保护课程的学生而言,电流保护的概念还是比较抽象,不易理解的。为了使学生更好的理解电流保护相关原理,进行电流保护实验,开发设计了电流保护仿真实验软件。学生可在该软件上完成阶段式电流保护（无方向/带方向）、零序电流保护（无方向/带方向）的相关实验。该实验软件主要分故障仿真和电流保护动作仿真两部分。故障仿真采用DDRTS系统来完成,电流保护动作仿真的开发工具选用VB。

Simulation experimental software design of transmission line current protection

Because current protection is simple,economic and reliable,it is widely used in power system.However,the concept of current protection is still abstract and hard to understand for students who are beginners of relay protection curriculum.In order to facilitate understanding of the related principle of the current protection for students,and carry out current protection experiments,simulation experimental software has been designed for current protection.Students can complete the stage current protection （no direction/ direction）,zero sequence current protection （no direction/ direction） experiments by the software.The experimental software includes fault simulation and trip simulation of current protection.The function of fault simulation is completed by DDRTS.VB is adopted as the developing tool of current protection trip simulation.