ZD010 双恒压供水西门子PLC设计论文

摘要

该毕业设计对环保、节能、自动补压型给水设备作了介绍。从节能科技的实践出发，阐述了变频调速技术在高楼给水设备中的应用。以PLC电路控制方式，介绍了智能水压控制系统的工作原理及PLC控制系统。在分析水压控制的工作流程的基础上，给出了PLC控制系统的硬件和软件设计。智能水压控制系统的基本控制策略是：采用电动机调速装置与可编程控制器（PLC）构成控制系统，进行优化控制,完成供水压力的恒定控制，在管网流量变化时达到稳定供水压力和节约电能的目的。系统的控制目标是泵站总管的出水压力，系统设定的给水压力值与反馈的总管压力实际值进行比较，其差值输入变频器运算处理后，发出控制指令，控制泵电动机的投运台数和运行变量泵电动机的转速，从而达到给水总管压力稳定在设定的压力值上。

Abstract

Be graduation practice's turn to have filled up pressure type water supply equipment work to environmental protection , energy conservation , automation introduce that. The frequency conversion speed regulation technology having set off from energy conservation science and technology practice , expounding hits the target in high building water supply equipment applying。Introduced the intelligent hydraulic pressure control system principle of work and the PLC control system. In in the analysis hydraulic pressure control work flow foundation, has produced the PLC control system hardware and the software design. The intelligent hydraulic pressure control system basic control strategy is: Uses the electric motor speeder and the programmable controller (PLC) constitutes the control system, carries on the optimized control,Completes the water supply pressure the constant control, when pipe network current capacity change achieved the stable water supply pressure and saves the electrical energy the goal. The system control goal is the pumping station main pipe water leakage pressure, the system hypothesis carries on the comparison for the hydraulic pressure value and the feedback main pipe pressure actual value, after its interpolation inputs CPU operation processing,

sends out the control command, the control pumps the electric motor to throw transports the Taiwan number and the movement variable displacement pump electric motor rotational speed, thus achieved stabilizes for the water main pipe pressure in hypothesis Pressure.

关键词:

恒压供水，可编程序控制器、压力传感器、变频器PID运算、PLC控制、恒压供水。

Keyword:

PLC control the programmable、Pressure sensor 、Frequency transformer PID arithmetic、PLC controlled 、The constant voltage supplies water。

目录

摘要 (1)

Abstract (1)

关键词: (2)

Keyword: (2)

目录 (3)

第一章绪论 (4)

1.1双恒压供水系统的目的和研究意义 (4)

1.2交流变频调速技术的优势与应用 (6)

1.3可编程序控制器的特点及应用 (9)

第二章系统的方案设计 (11)

2．1设计任务书 (11)

2．2控制方案 (12)

第三章变频器的节能原理 (16)

3.1变频器的控制方式 (16)

3．2变频调速的调速、节能原理 (16)

第四章控制系统硬件设 (18)

4.1主电路设计 (18)

4.2控制电路设计 (18)

第五章各种元器件的选择 (20)

5.1 PLC的选择 (20)

5.2变频器的选择 (20)

5.3 压力传感器的选择 (20)

5.4触摸屏的选择................................ 错误！未定义书签。

5.5软起动的选择 (21)

第六章恒压供水系统软件设计 (22)

6.1 程序功能图的设计 (22)

6.2、S7-200/CPU226内置PID功能及其编程 (23)

6．3系统程序设计 (24)

6.4输入输出地址分配表如下 (30)

6．5程序说明 (30)

小结 (33)

参考文献 (35)

致谢 (36)

附录1. 材料清单 (37)

附录2. 梯形图 (38)