深度抽象继电保护理论的仿真实验探索

Research on Simulation Experiment of Deep Abstract Relay Protection Theory

在电力系统继电保护中,相间短路的方向性电流保护是典型的理论抽象、实现复杂、不易理解的教学难点,现有教材又大多缺少关于从相电压、相电流实现方案到90°接线方式之间的过渡性内容,实验过程中,学生更是无法参与到功率方向继电器构建这个至关重要的环节中去,因而,理解该理论精髓存在着天然障碍.尝试将MATLAB/Simulink系统仿真引入电力系统相间短路的方向性电流保护实验,展示了一个完整的元件选择、参数设置、模型构建、实验方案设计过程,有效弥补了实验装置的不足,增强了学生实践能力拓展的渠道.因此,仿真虚拟实验是一种深度抽象继电保护理论学习的有效模式,应该受到重视.

In the relay protection of power system,directional current protection of inter-phase short circuit is a typical teaching difficulty famous for its abstract theory,complex realization and understanding obstacles.Most of the existing textbooks lack the transitional content from phase voltage and phase current realization scheme to 90°connection mode.In the course of experiment,students are unable to participate in the construction of power directional relay.Thus,there are natural obstacles in understanding the essence of the theory.This paper attempts to introduce the simulation of MATLAB/Simulink system into the directional current protection experiment of inter-phase short circuit of power system.It shows a complete process of component selection,parameter setting,model construction and experiment scheme design,which effectively compensates for the shortcomings of the experimental device and enhances the channel of students’ practical ability development.Therefore,simulation virtual experiment is an effective model for deep abstract relay protection theory learning.