本 科 毕 业 设 计〔论文〕 题 目：基于 S7-300 锅炉盘管出口水温滞后控制系统专题题目：学 院：电气工程与自动化学院专 业：自动化班 级：093 班学 号：2025 一八 73学 生：指导老师： 职称：副教授20 一三年 6 月 6 日摘 要锅炉控制在工业控制中一直富有新意的课题，对于不同的控制对象，有着不同的控制方式和模式。温度系统惯性大，滞后现象严重，难以建立精确的数学模型，给控制过程带来很大难题。本文首先对电锅炉采纳的控制方案进行了深化讨论，选择一种适合于 PLC 控制的方案。以锅炉为被控对象，以锅炉出口水温为主被控参数，以炉膛内水温为副被控参数，以加热炉电阻丝电压为控制参数，选用西门子 CPU314C-2 PN/DP 为控制器，构成锅炉温度串级控制系统；采纳典型的 PID 算法，运用 PLC 梯形图编程语言进行编程，实现锅炉温度的自动控制。这个方案既满足了系统快速和精确到达平衡，又大大的降低了本钱并且简化了编程和调试工作。利用先进的 PLC 程序编制工具 STEP7 及杰控组态软件，完成了锅炉控制系统的程序设计和监控画面设计。关键词： PLC 控制；锅炉控制；串级控制；PIDAbstract Boiler control has been innovative topics in industrial control, for different controlled objects, different control ways and mode. Temperature system of inertia is big, lag phenomenon is serious, is difficult to establish accurate mathematical model, bring great difficulties to control process. This paper the control scheme of electric boiler adopts the carried on the thorough research, choose a suitable for PLC control scheme. In boiler for controlled object, mainly boiler outlet water temperature was accused of parameters, with the water temperature in the hearth to assistant was accused of parameters, with heating resistance wire voltage as control parameters, selection of Siemens CPU314C - 2 PN/DP as the controller, a boiler temperature cascade control system; USES the typical PID algorithm, using PLC ladder diagram programming language programming, realize the boiler temperature automat...
