【正文】 1 第一章 緒論 隨著社會經(jīng)濟(jì)的迅速發(fā)展，水對人民生活與工業(yè)生產(chǎn)的影響日益加強(qiáng)，人民對供水的質(zhì)量和供水系統(tǒng)可靠性的要求不斷提高。 主電路方案設(shè)計(jì) .......................................................................... 錯誤 !未定義書簽。 關(guān)鍵詞 : 恒壓供水 組態(tài)監(jiān)控 PLC 變頻器 vii Abstract In this paper, the water pump in the highrise building constant pressure water supply system of PLC and inverter control and monitoring configuration design process. The system uses hydraulic pressure transmitter for continuous water supply testing, to detect the pressure signal after the conversion to electrical signals to the programmable logic controller (PLC) and the inverter. PLC as a core control mechanism, on the one hand to control the peak transducer and pump up the work, on the other hand, connected with the host puter, running on the system to achieve the configuration monitoring。 系統(tǒng)設(shè)有監(jiān)控上位機(jī)，上位 機(jī) 與 PLC 連接， 完成對系統(tǒng)運(yùn)行的 數(shù)據(jù)采集 和 狀態(tài)監(jiān)控 。系統(tǒng)使用壓力變送器對供水水壓進(jìn)行連續(xù)檢測，檢測到的壓力信號轉(zhuǎn)換成電信號后送給可編程控制器（ PLC）和變頻器。 設(shè)計(jì)（論文）完成的主要內(nèi)容： 1） 恒壓供水 PLC 控制系統(tǒng)總體方案設(shè)計(jì) ； 2） 恒壓供水 PLC 控制系統(tǒng)硬件設(shè)計(jì)； 3） 恒壓供水 PLC 控制系統(tǒng) PLC 編程； 4） 控制器參數(shù)的整定，控制功能驗(yàn)證 5） 系統(tǒng)設(shè)計(jì)的優(yōu)缺點(diǎn)，設(shè)計(jì)心得 提交設(shè)計(jì)（論文）形式（設(shè)計(jì)說明與圖紙或論文等）及要求： 1）設(shè)計(jì)論文 2~4 萬字（ 40 頁）。格式和要求按院有關(guān)規(guī)定。 PLC 作為 核心 控制機(jī)構(gòu)， 一方面控制變頻器和高峰補(bǔ)水泵工作，另一方面與上位機(jī)相連，實(shí)現(xiàn)對系統(tǒng)運(yùn)行狀態(tài)的組態(tài)監(jiān)控；變頻器通過其內(nèi)部的 PID 調(diào)節(jié)運(yùn)算功能， 變頻器和水泵構(gòu)成執(zhí)行機(jī)構(gòu)，壓力變 送器作為 檢測和 反饋機(jī)構(gòu)，共同組成一個閉環(huán)控制系統(tǒng)。 系統(tǒng)運(yùn)行時， 壓力 變送 器能夠?qū)崟r檢測到 供水管網(wǎng)的水 壓值并反饋到 PLC 和變頻器 ， 變頻器 利用 P1D 控制策略實(shí)時調(diào)整水泵 的運(yùn)行速度（頻率）、改變其 流量，從而實(shí)現(xiàn)恒壓 供水。 inverter through its regulation of the internal operations of the PID function, transducer and pumps constitute the implementation of institutions, pressure transmitter testing and feedback as a body, the formation of a joint closedloop control system. The system uses a frequency converter three drag pump motor starter switch, operation and speed. The use of recycled water pump unit run. PC system with monitor, PC and PLC connection, pletion of the system of data collection and condition monitoring. System is running, the pressure transmitter can be detected in realtime pressure water supply works and value back to the PLC and inverter, inverter P1D control strategies using realtime adjustment of pump speed (frequency), change its flow, in order to achieve constant pressure water supply. A single pump operating conditions through the regulation of the power inverter to change the frequency f to change the motor speed n, in order to change the pump flow Q to achieve. Analysis of pump power consumption parison, one can see the use of VVVF inverter to achieve constant pressure water supply, when the pump motor speed to reduce traffic flow and speed in direct proportion to the power side to speed the decline in the three traditional methods of water supply valve expenditure pared to the door control, can greatly reduce energy consumption, energysaving effect of the system. KEY WORDS: Water supply, constant pressure water supply, PLC viii 目 錄 第一章 緒論 ........................................................................................................................1 第二章 調(diào)速恒壓供水系統(tǒng)能耗與安全性分析 ........................................................3 供水系統(tǒng)的基本模型 ...................................................................................................... 3 供水系統(tǒng)的特性曲線和工作點(diǎn) ...................................................................................... 4 供水系統(tǒng)中恒壓實(shí)現(xiàn)方式 .............................................................................................. 6 異步電動機(jī)調(diào)速方法 ...................................................................................................... 6 變頻器選型 ...................................................................................................................... 8 變頻調(diào)速恒壓供水系統(tǒng)能耗分析 ................................................................................ 10 轉(zhuǎn)速控制調(diào)節(jié)流量實(shí)現(xiàn)節(jié)能 ...................................................................................... 10 轉(zhuǎn)速控制供水系統(tǒng)的工作效率高 ................................................................................11 變頻調(diào)速電機(jī)運(yùn)行效率高 .......................................................................................... 12 供水系統(tǒng)安全性討論 .................................................................................................... 12 水錘效應(yīng) .................................................................................................................. 12 產(chǎn)生水錘效應(yīng)的原因及消除辦法 ............................................................................... 13 變頻調(diào)速對供水系統(tǒng)安全性的作用 ............................................................................ 13 第三章 變頻調(diào)速恒壓供水控制系統(tǒng)設(shè)計(jì) ............................................................... 15 供水系統(tǒng)總體方案的確定 ............................................................................................ 15 系統(tǒng)控制電路 ................................................................................................................ 25 控制系統(tǒng)的硬件設(shè)計(jì) ..................................................................... 錯誤 !未定義書簽。 控制電路設(shè)計(jì) ............................................................................. 錯誤 !未定義書簽。把先進(jìn)的自動化技術(shù)、控制技術(shù)、通訊及網(wǎng)絡(luò)技術(shù)等應(yīng)用到供水領(lǐng)域，成為對供水系