对于变压器和输电线路的保护研究是当前电力系统保护研究的重要组成部分.用Matlab中的Simulink及SimPowerSystems工具箱建立变压器仿真模型和输电线路仿真模型,仿真模型中选择用M文件编写S函数,用于定制变压器差动保护和输电线路距离保护的Simulink模块.实现了借助于Matlab的数字式差动保护和线路距离保护的仿真与研究,对仿真的动作行为进行了验证.%The protection study for the transformers and transmission lines is an important part of the power system protection study. Transformer simulation model and transmission lines simulation model were build by using Matlab Simulink and SimPowerSystems toolbox. In the simulation model, choose M-file to write S-function for custom Simulink blocks of transformer differential protection and transmission lines distance protection. Achieve the simulation and research of digital differential protection and transmission lines distance protection by means of Mat-lab. Movement behavior of the simulation are verified.
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