毕业设计：基于MCGS锅炉汽包水位计算机控制系统设计(终稿)-精品.docVIP

本科生毕业设计说明书（毕业论文） 题 目：基于MCGS的锅炉汽包水位计算机控制系统设计 学生姓名： 学 号： 专 业：测控技术与仪器 班 级： 基于MCGS的锅炉汽包水位计算机控制系统设计 摘 要 汽包水位是影响锅炉安全运行的一个重要参数，它间接地反映了锅炉负荷和给水的平衡关系，汽包水位过高或者过低的后果都非常严重，因此对汽包水位必须进行严格控制。PLC技术的快速发展使得PLC广泛应用于过程控制领域并极大地提高了控制系统性能，PLC已经成为当今自动控制领域不可缺少的重要设备。 本文从分析影响汽包水位的各种因素出发，重点分析了锅炉汽包水位的“虚假水位现象”，提出了锅炉汽包水位控制系统的三冲量控制方案。根据控制要求和所设计的控制方案进行硬件选型以及系统的硬件设计，利用PLC编程实现控制算法进行系统的软件设计，最终完成PLC在锅炉汽包水位控制系统中应用。采用自动化监控软件MCGS进行操作站的组态设计，现场数据检测及输出控制，实现了对锅炉汽包水位的控制。 关键词：汽包水位；PLC；三冲量调节系统；PID控制；MCGS监控软件 Based on the MCGS boiler drum water level of the computer control system design Abstract The steam drum water level is a very important parameter for the boiler safe operation, it reflects the balance of boilers load and supplying water indirectly, both high and low steam drum water level may lead to extremely serious consequence, therefore it must be strictly to be controlled. With the rapid development of PLC technology, it can widely be applied to the process control domain and enhances the performance of control system enormously. PLC has already become the essential important equipment in automatic control domain. Based on the analysis of all kinds of factors which influence steam drum water level, “unreal water level phenomenon” is analyzed specially, and three impulses control plan for steam drum water level control system is proposed. According to the needs of control, the selection of control requirements hardware and system hardware design as well as system software design are carried out. Finally the application of PLC in boiler steam drum water control system is completed. We choose automatic monitored software MCGS as operation station which can realize configuration design for operation station and realize data testing and output control in the scene. As a result, this can realize the control for the water level of the steam manifolds of boilers. Key words: Steam drum water level ; PLC ; Tri-impulse controlling system ; PID control; MCGS monitoring and software 目 录 TOC \o 1-3