基于控制Petri网的高温气冷堆燃料装卸过程控制系统设计方法

Design Method of Control System for HTGR Fuel Handling Process with Control Petri Net

介绍了一种基于控制Petri网(CPN)的控制系统设计方法,通过将库所与输出和操作关联,将变迁与输入和条件关联,并引入了宏库所和宏操作,实现了对复杂控制系统的分层次设计。在分析燃料元件装卸系统(FHS)基本功能和装卸流程的基础上,利用CPN对其进行了分层设计。根据变迁的触发条件,设计的CPN可直接转换为PLC的LAD程序;该程序在FHS模拟控制系统试验台上进行了验证。应用结果表明,该方法具有设计结构清晰,描述严格准确,程序设计高效等优点,可以很好地满足球床式高温气冷堆(HTGR)燃料装卸过程控制系统的设计要求。

As a complex mechanical system, the fuel handling system （FHS） of pebble-bed high temperature gas cooled reactor （HTGR） is with the features of complicated structure, numerous control devices and strict working scheduling. It is very important to precisely describe the function of FHS and effectively design its control system. A design method of control system based on control Petri net （CPN） is introduced in this paper. By associating outputs and operations with places, associating inputs and conditions with tran- sitions, and introducing macro-places and macro-actions, the CPN realizes hierarchy design of complex control system. Based on the analysis of basic functions and working flow of FHS, its control system is described and designed by CPN. According to the firing regulation of transition, the designed CPN can be easily converted into LAD program of PLC, which can be implemented on the FHS simulating control test-bed. Application illuminates that proposed method has the advantages of clear design structure, exact description power and effective design ability of control program, which can meet the requirements of FHS control system design.