虚拟继电保护柔性建模仿真系统的研究

Virtual Protection Flexible Modeling and Simulation System

为解决目前电力系统仿真分析中缺乏系统化继电保护模型的问题,研究并开发了基于柔性仿真技术和混杂Petri网的虚拟继电保护建模仿真系统。根据继电保护的特点和建模要求,提出保护系统混杂时间Petri网模型,作为整个柔性建模仿真系统的基础;预设多类元件和算法模块,实现组态式搭建继电保护模型,并采用多方法、多层次的柔性建模手段,使模型具有混杂性和多分辨率,以满足不同仿真应用的需要;仿真中应用柔性仿真原理,分别开发具有特定功能的程序组件,面向不同应用构成应用框架,由仿真引擎统一调配数据和控制运行流程,将保护模型柔性地引入电力系统暂态和中长期仿真,基于开环和闭环模式,可方便地进行电网连锁故障重演、保护装置测试、保护新原理开发、定值校验等方面的仿真和研究,具有重要的实际意义和工程价值。

To solve the problem of lacking of integrated protection model in power system simulation, the virtual protection modeling and simulation system （VPMS） based on flexible simulation technology and hybrid Petri net is introduced. According to the characteristics of relay protection and requirements of protection modeling, the hybrid time Petri net （HTPN） model is proposed to be the foundation of VPMS. Many sorts of protection components and algorithm modules are programmed and can be considered to produce the protection model. Using modeling method of multi-way and multi-layer, the protection model becomes hybrid and of multi-resolution, which meets the requirements of various simulation situations. Using flexible simulation theory, program modules with special functions are developed and can be easily combined into templates for various applications..Under uniform management and control of a simulation engine, the protection model is imported to power system transient, middle and long term dynamic simulation with VPMS, which has important practical value for the study of power grid cascading fault analysis, protection testing, new principle development, protection settings and so on.