基于EMTP的数字式距离保护仿真教学

针对教学需要，为促进学生对继电保护系统尽早形成整体认识，并深入了解数字式继电保护的各个实现细节，提出了一种在EMTP电磁暂态仿真软件基础上编制自定义模块实现简化的线路距离保护教学系统。该自定义模块在EMTP故障仿真的过程中与EMTP仿真软件以闭环方式进行交互，对数字式继电保护的各实现环节进行了仿真建模。文末对相间短路故障和单相接地故障进行了仿真分析。

Educational Use of EMTP for the Study of a Distance Relaying of Transmission Lines

In order to enhance understanding of the basic concepts of distance relaying of undergraduate students who are new to the subject of power system protective relaying. This paper proposes an EMTP based integrated simulation system to provide systematic relaying concepts by modeling a digital relaying system using self defined model functions in a closed-loop manner. Various elements of digital distance relaying are organized to generate a systematic approach to modeling the actual hardware of digital relaying systems, Case studies relating to the most commonly encountered single phase-to-ground fault and phase- to-phase fault are presented and various fault distances and fault inception angles are considered.