净水厂送水泵站控制系统设计及应用毕业设计.doc

净水厂送水泵站控制系统设计及应用 吉林化工学院毕业设计说明书 - PAGE 30 - - PAGE I - 吉林化工学院毕业设计 净水厂送水泵站控制系统设计及应用 Design and Application of waterworks water supply pump station control system 摘 要 本课题设计主要设计了一种变频调速恒压供水系统，它主要包括了三个部分既下位机PLC控制部分；上位机WINCC 监控部分；和PLC仿真部分组成的。它的原理是以西门子S7-300系列作为下位机，由变频器、PLC及PID调节器组成控制系统来调节水泵的输出流量。电动机泵组由三台水泵并联而成，由变频器或工频电网供电，根据供水系统出口水压和流量来控制变频器电动机泵组之间的切换及速度，使系统运行在最合理的状态，保证按需供水，上位机采用WINCC为监控软件,实时监控系统工作状态。经调试和仿真运行表明，该系统能够对供水过程进行自动控制，能够有效地降低能耗，保证了供水系统维持在最佳运行状况，提高生产管理水平。该监控系统安装维护方便，运行稳定可靠,监控软件功能齐全，人机界面友好，使用方便。 关键词：变频调速；恒压供水；PLC；Wincc - PAGE 31 - Abstract The project design is mainly designed a constant pressure water supply system.It mainly consists of three parts both lower machine PLC control section; PC WINCC monitoring section; and the PLC simulation part. it principle is based on Siemens S7-300 series as the next crew.By the inverter, PLC and PID regulator integral control system to adjust the pump output flow.Motor pump group of three pumps parallel and become, by inverter or industrial frequency power supply, according to the water supply system to control the pressure and flow export of frequency switching between motor pump group, so the system and speed in the most reasonable position, make sure on-demand water supply. In this paper, wincc as PC monitoring software. Commissioning and operation shows that the system can be automatic control of water supply process can effectively reduce the energy consumption and ensure the water supply system to maintain in the best operation condition, improve production management level. Monitoring systems easy installation and maintenance, operation is stable, reliable; Monitoring software function is well-found, friendly man-machine interface, easy to use. Key Words：Variable frequency speed-regulating;Constant-pressure water supply;Plc;Wincc 目 录 TOC \o 1-3 \h \z HYPERLINK \l _Toc358963556 摘 要 PAGEREF _Toc358963556 \h I HYPERLINK \l _Toc358963557 Abstract PAGEREF _Toc358963557 \h II HYPERLINK \l _Toc358963558 第1章 绪