系统非正常运行工况下微机保护动态特性的闭环仿真

Closed-Loop Simulation of Microcomputer Protection Dynamic Property in Abnormal Working Conditions

以系统非正常运行工况下常见的两个问题为例,在Simulink软件中建立仿真模型,并结合Matlab软件自带的M语言源文件编写保护算法,其逻辑判断结果作为断路器的动作命令回送至系统模型中,实现了电力系统和保护环节之间的数据交换与闭环控制。结果表明利用数字仿真技术可以完整观测系统处于不正常运行状态下时保护算法的程序走向和动态响应过程。

Taking two problems taking place frequently in abnormal working conditions for example, this paper established a simula-tion model in Simulink of Matlab and used M language source file of Matlab to write protection algorithm. Its logic judgement resultsacted as action orders of circuit breakers to be sent back to the system model, so as to realize data exchange and closed-loop controlbetween power system and protection link. The results show that using digital simulation technology can completely monitor protectionalgorithm＇s program path and dynamic response process for the system in abnormal working conditions.