合成氨装置控制系统仿真

摘要

The control system of the process of ammonia production is non-linear, time- varying, time-lag and uncertainty, and the ESD system iss also complex with complicated logical algorithm. Based on PIDs, SAMA and log ic diagrams, using process control and configuration software, the automatic control system of ammonia production was simulated in the paper. First, the control system model was setup according to PIDs and SAMA. Then, the model was configured and tested. Finally, the system integration was done, and the ammomina production operator training simulator containing automatic control system was developed. The simulation results show that the simulated control system can reflect real plant' s dynamic characteristics, and can be used in the integration with simulated dynamic model. When the fault or the large range of fluctuation occurs, the responses of the simulated ESD system are consist ent with the actual states. The control system simulation is significant to the development of urea production operator training simulator.%研究合成氨装置控制系统的优化设计问题,合成氨装置过程被控对象具有非线性、时变、时滞、不确定性以及ESD系统中复杂、庞大的逻辑关系运算等特点,导致工厂控制系统开发困难.以某合成氨装置工艺流程和生产过程控制系统为基础,并对装置的控制系统建立仿真系统.首先根据PID,SAMA和联锁逻辑图,分别对过程控制系统和紧急停车系统进行数学和逻辑建模；然后根据已经开发的工艺流程模型,对控制系统模型和工艺流程模型进行组态,完成两者之间的通讯；最后进行,系统集成,完成了合成氨仿真培训系统.利用过程控制软件和组态软件进行仿真,结果表明,控制系统能够真实地反映实际装置的动态特性,可以正确进行装置的紧急停车过程和联锁触发响应,对合成氨生产仿真培训系统的开发具有重要意义.