水泵房集中控制水泵供水PLC系统改造研究(席志强).docx

水泵房集中控制水泵供水PLC系统改造研究(席志强).docx

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安徽工业大学毕业论文

安徽工业大学继续教育学院

本科论文

论文题目：

水泵房集中控制水泵供水PLC系统改造研究

学　　　　号：

_________________________

电气工程及其自动化

作　　者：

_________________________

专业名称：

_________________________

2015年5月15日

目录

摘要····································································································2

第一章水泵房集中自动控制系统的工作原理及组成······································4

1.1概述··························································································4

1.2工作原理·····················································································4

1.3系统组成····················································································4

第二章控制系统结构设计·········································································7

2.1系统总体结构·············································································7

2.2设计中装置的相关介绍··································································10

2.3控制系统网络设计········································································11

2.4控制系统功能设计·········································································12

2.5控制系统可靠性设计·····································································12

2.6控制系统程序设计········································································13

第三章PLC水泵供水自动控制系统···························································17

3.1PLC水泵供水自动控制系统技术····················································17

3.2PLC水泵供水自动控制系统分层······················································17

3.3影响PLC控制系统稳定的干扰因素···················································19

3.4PLC控制系统的抗干扰措施······························································19

第四章结束语·························································································20

参考文献·································································································21

致谢·····································································································22

附录程序图······························································································23

附录画面图······························································································25

摘要

基于PLC的水泵供水监控系统现场控制部分是为了安全和正常生产而进行的各种有关参数或状态的集中监测，并对有关环节加以控制，是保护、供水等主要生产环节安全运行的重要设施。

本文主要介绍了一种基于西门子S7-300PLC的水泵房水泵自动控制系统的设计方法和思路。

西门子S7-300型PLC给出了水泵供水系统的传感器及执行机构的配置方案、通信网络结构和系统功能设计，实现了对水泵进行自动控制，水位监测、自动启停水泵、故障自诊断等功能；同时也实现了水泵运行的合理调度，提高了设备利用率，达到了节能增效的效果，并能与上位机通讯，实现远程控制和在线监测，提高了炼钢自动化水平和安全性。

关键词：

水泵PLC自动控制远程控制

PicktoAbstract

PumpwatermonitoringsystembasedonPLCthecontrolpartisforthesakeofsafetyandnormalproductionofavarietyofrelatedparametersorstatecentralizedmonitoring,controlandprocessrelated,isamajorproductionprotection,watersupplyandsoonsafeoperationoftheimportantfacilities.ThispapermainlyintroducesakindofwaterpumphousewaterpumpbasedonSiemensS7-300PLCautomaticcontrolsystemdesignmethodandtrainofthought.SiemensS7-300PLCgivesthewaterpumpofwatersupplysystemofsensorsandactuatorsconfigurationscheme,thecommunicationnetworkstructureandsystemfunctiondesign,realizedtheautomaticcontrolofwaterpump,waterlevelmonitoring,automaticstart-stoppumps,faultself-diagnosisfunctions;Alsoimplementsthepumprunningreasonableschedulingatthesametime,improvetheutilizationrateofequipment,toachievetheeffectofenergysavingandefficiencyincreasing,andcancommunicationwiththeuppermachine,torealizetheremoteon-linemonitoring,controlandimprovethelevelofthesteelmakingautomationandsecurity.

Keywords：

ThewaterpumpPLCTheautomaticcontrolTheremotecontrol

第一章水泵房集中自动控制系统的工作原理及组成

1.1概述

随着计算机控制技术的迅速发展，以微处理器为核心的可编程序控制器（PLC）控制已逐步取代继电器控制，普遍应用于各行各业的自动化控制领域。

当然冶金行业也不例外，但是目前许多炼钢厂供水系统还采用人工控制，水泵的开停及选择切换均需人工完成，完全依赖于工人的技术、经验和责任心，也预测不了水位的增长速度，做不到根据水位和其他参数在用电的峰谷期自动开停水泵，这将严重影响炼钢自动化管理水平和经济效益，同时也容易由于人为因素造成各种安全隐患。

目前，水泵房供水系统普遍采用人工操作，存在着人员劳动强度大、电机启停时间长、水泵运行效率低等诸多问题，如何实现水泵房供水的自动控制和无人值守，并满足生产调度综合自动化的要求，便成为当前急需解决的问题。

针对当前水泵房系统的实际情况，本文提出一种实现水泵房集中控制系统的设计方案，并对其工作原理和结构做一扼要介绍。

1.2工作原理

水泵房水泵自动控制系统通过检测水仓水位和其它参数，控制水泵轮流工作与适时启动备用泵，合理调度水泵正常运行。

系统通过触摸屏以图形、图像、数据、文字等方式，直观、形象、实时地反映系统工作状态以及水仓水位、电机工作电流、电机温度、轴承温度、排水管流量等参数，并通过通讯模块与综合监测监控主机实现数据交换[附程序图

]。

该系统具有运行可靠、操作方便、自动化程度高等特点，并可节省水泵的运行费用。

1.3系统组成

　　整个自动控制系统由数据自动采集、自动控制、动态显示及故障记录报警和通讯接口等4个部分组成。



（1）数据自动采集与检测　

　数据自动采集与检测主要分为两类：

模拟量数据和数字量数据。



模拟量检测的数据主要有：

水仓水位、电机工作电流、水泵轴温、电机温度、供水管流量；数字量检测的数据主要有：

水泵真空断路器和真空接触器的状态、电动阀的工作状态与启闭位置、电动阀状态、水泵出水口压力[

]。



数据自动采集主要由PLC实现，PLC模拟量输入模块通过水位计传感器连续检测水仓水位，将水位变化信号进行转换处理，计算出单位时间内不同水位段水位的上升速率，从而判断矿井的涌水量，控制排水泵的启停。

电机电流、水泵轴温、电机温度、排水管流量等传感器与变送器，主要用于监测水泵、电机的运行状况，超限报警，以避免水泵和电机损坏。

PLC的数字量输入模块将各种开关量信号采集到PLC中作为逻辑处理的条件和依据，控制排水泵的启停。

　在数据采集过程中，模拟量信号的处理是将模拟信号变换成数字信号（A/D转换），其变换速度由采样定律确定。

一般情况下，采样频率应为模拟信号中最高频率成分的2倍以上，这样经A/D变换的精度可完全恢复到原来的模拟信号精度。

A/D