面向对象Petri网在热工保护系统建模中的应用  

Application of Object-Oriented Petri Nets in Thermal Protection System Modeling

作　　者：文怀周 任志文[1] 牛玉广[2] 

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]华北电力大学控制与计算机工程学院,北京102206

出　　处：《南京工程学院学报（自然科学版）》2015年第4期47-53,共7页Journal of Nanjing Institute of Technology(Natural Science Edition)

摘　　要：热工保护系统作为典型离散事件系统,难以用常规的数学方法进行描述和分析.模型是对系统结构和动态特性的概括与抽象,建模是描述和分析热工保护系统的重要环节.利用面向对象Petri网建立热工保护系统模型.定义面向对象Petri网模型的运行规则,针对热工保护的开关量分类,分别设计各类子网对象模型,定义各消息传递出口和接收口之间的连接,实现系统子网对象的各种联锁关系.以火电厂热工保护系统中的送风机保护子系统为例,概述面向对象Petri网的实现过程.与传统建模、分析方法相比,本建模方法具有图像化、抽象性、继承和可封装等特点,所建模型具有可视性、可复用性和可维护性.Thermal protection system, as a typical discrete event system, is difficult to describe and analyze by conventional mathematical methods. Model is a generalization and abstraction of the system structure and dynamic properties, so modeling is an important part of the description and analysis of the thermal protection system. The operation rules of object-oriented petri nets model are defined based on the method of object-oriented petri net modeling. Models for subnets are designed according to the classification of thermal protection switches. Then the connection between messaging exports and receivers of each subnet is defined so as to achieve all interlocking relationships of between subnets. Take blower protection subsystem from thermal power plant protection system for example. It illustrates the implementation process of object-oriented petri nets. Compared with traditional modeling and analysis methods, this approach to modeling is characterized as visualization, abstraction, inheritability and packageability. Besides, the model is visible, reusable and maintainable.

关 键 词：热工保护系统 面向对象PETRI网 开关量 可视化建模 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]