城镇水厂自动供水scada系统的研究与应用.pdf

太原理工大学 硕士学位论文 城镇水厂自动供水SCADA系统的研究与应用 姓名：李海云 申请学位级别：硕士 专业：控制理论与控制工程 指导教师：贾敏智 20100401 太原理工大学硕士研究生学位论文 I 城镇水厂自动供水 SCADA 系统的研究与应用 摘 要 供水是一个关系国计民生的重要产业，随着我国经济的发展和人民生 活水平的不断提高，人们对供水质量和供水系统可靠性的要求也越来越高 城镇供水设施落后的矛盾日益突出，加快城镇供水设施建设已经成为当务 之急如何合理利用水资源，高质高效的实现对城镇的供水成为一个重要 的课题 供水自动控制系统作为保证安全、连续、优质供水的措施，其意义十 分重大利用先进的自动化技术、控制技术以及通讯技术，采用先进的控 制理论设计高性能、高节能的科学供水方式成为发展的必然趋势 该供水系统包括水源地取水，加压站加压，二水厂恒压供水以及一水 厂储水与供水几个部分，各供水环节距离远且分布较分散针对这些特点 设计了一套集自动控制技术、通信技术、传感技术和计算机技术于一体的 SCADA系统该SCADA系统中，二水厂控制站距中央控制室距离较近，采 用有线通信方式实现监控；一水厂、加压站以及水源地由于距控制室较远， 采用无线数传电台实现数据通信，并且采用485总线对各通信设备组网。

由于水源地井群分布较分散，在每个井房设置无线数传电台、RTU和 EDA电量采集模块对水源井的流量、报警以及电参量等重要数据进行采集， 并可对水泵实现远程控制在水源地值班室、加压站和一水厂通过无线数 传电台与上位机进行通信， 并使用西门子公司S7-200系列PLC实现对现场液 位、流量、压力等的数据采集以及对泵和阀的控制 太原理工大学硕士研究生学位论文 II 二水厂控制站负责对城区实现恒压供水， 该站设计了一套由PLC、 变频 器、远传压力表、多台水泵机组、计算机等主要设备构成的全自动变频恒 压供水及其远程监控系统，具有全自动变频恒压运行、自动工频运行、远 程手动控制和现场手动控制等功能控制系统中采用了STEP7 Micro/win编 程软件，设计了一个用于供水系统压力控制的PID控制器，PID控制器内置 在PLC中， 对压力给定值与测量值的偏差进行处理， 实时控制变频器的输出 电压和频率，进而改变水泵电动机的转速来改变水泵出水口流量，实现管 网压力的自动调节，使管网压力稳定在设定值附近 为了实现对整个供水系统的远程监控，在自来水公司二水厂设置中央 控制室，并在控制室内配备工业计算机一台运行组态软件，用于对供水过 程的各环节进行数据采集和监控。

系统选用北京亚控公司的KINGVIEW6.52 组态软件对整个自动供水系统的进行组态基于KINGVIEW开发坏境下的 工程组态，界面友好、易于操作、图形丰富，工程运行时能以动画的形式 实时显示现场设备的运行状态 该自动供水控制系统已在山西省山阴县自来水公司实际运行近一年， 从水厂运行效果来看，这种方案有利于提高城镇供水的自动化程度，并实 现了对城镇稳定高质高效的供水 关键字：SCADA系统，485总线，通信，组态，供水系统 太原理工大学硕士研究生学位论文 III RESEARCH AND APPLICATION ON AUTOMATIC WATER SUPPLY SCADA SYSTEM OF URBAN WATER PLANT ABSTRACT Water supply is concerned with national economy and people’s life. With the development of the economy of our country and the continuous improvement of living standard, people demand better water supply quality and reliability of water supply system. The conflict between urban water supply and requirement is becoming more and more outstanding, so quickening the urban water supply development is becoming an urgent matter for the moment. It is a very important subject that how to use the water properly, and how to make the development of the economy and society match the water supply. As an effective measure to ensure secure, continuous and high quality water supply, the water plant automatic control system makes great sense. It is an inevitable tendency to design a powerful and energy-saving water supply system, using advanced automation technology, communication technology, control technology and control theories. The water supply system is composed of pumping water from water source, increasing pressure at boost stations, supplying water under constant pressure at Second Water Plant and storing and supplying water at First Water Plant. All 太原理工大学硕士研究生学位论文 IV sections distribute dispersedly, locating long distance from each other. According to these properties, a SCADA system was designed with automatic control technology, communication technology, sensing technology and computer technology. In this SCADA system，wire communication is used between the Second Water Plant and the control center for the short distance, while wireless communication which links to each communication equipment with 485 bus is used between control center and boost stations, water source, the First Water Plant and the control center for the long distance. Because the well group of water source dispersedly distributed, every well house has a wireless data transceiver, RTU and EDA to gather information about water source well flux, warning and electricity parameters, and pumps can be controlled remotely. The duty room of water source, boost stations and the First Water Plant communicate with the control center by wireless data transceiver, and S7-200 PLC is used to gather data on water level, flow rate and pressure and control pumps and valves. At the Second Water Plant, which is in charge of the urban area water supply under constant pressure, a fully automatic frequency conversion constant pressure water supply and remote monitoring system was designed with PLC, frequency inverters, teletransmission pressure gauges, multi-pump set and computer, and this system has many functions such as fully automatic frequency conversion constant pressure running, automatic power frequency running, 太原理工大学硕士研究生学位论文 V remote manual control and local manual control. The control system adopting STEP7-Micro/Win3232 software designs a water supply system PID controller embedded in PLC. The controller processing the difference between set value and measuring value timely controls the output voltage and frequency of frequency inverter, so that it can control the outlet’s flow rate by controlling motor’s rotate speed of the pump, realizing the pipe network’s pressure automatic regulation and making the pipe network’s pressure around the set value. In order to implement the whole water supply remote monitor, in the Second Water Plant central control room a configuration software was placed in an industrial computer to collect data and monitor each section of the water supply. The。