工厂恒压变频调速供水系统设计

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1、衢州学院毕业设计（论文）题　　目：工厂恒压变频调速供水系统设计作　　者：分院：电气与信息工程学院专业班级：电气自动化二班指导教师：职　　称：　　副教授　2013年12月25日工厂恒压变频调速供水系统设计目录摘要·······················································4一．绪论·····················································51.1引言····················································51.2变频恒压供水产生的背景和

2、意义····························61.3变频恒压供水的现况·········································6-7二．变频恒压供水的理论分析······································82.1水泵的工作原理·············································82.2供水电机的搭配···········································8-92.3水泵的调节方式·······························

3、···········9-122.4恒压供水系统的能耗分析····································12-162.5供水系统的安全性问题·····································16-172.6本章小结·················································17-18三．变频恒压供水系统的构成及控制原理·····························183.1变频恒压供水控制系统的构成方案·····························183.2变频恒压供

4、水系统的结构···································18-203.3变频恒压供水系统的控制方案·····························20-223.4变频恒压供水系统的水压恒定控制···························233.5变频供水水泵加减的控制·································23-263.6本章小节···············································…26四．变频恒压供水系统的设计···························

5、··········264.1乐山市第一水厂的现况····································26-284.2变频改造的可行性分析·····································28-294.3变频电机的确定·············································294.4变频器的选型·············································29-304.5硬件设计················································

6、·30-314.7本章小节·················································321摘要随着我国社会经济的发展，住房制度改革的不断深入，人们生活水平的不断提高，城市建设发展十分迅速，同时也对基础设施建设提出了更高的要求。城市供水系统的建设是其中的一个重要方面，供水的可靠性、稳定性、经济性直接影响到用户的正常工作和生活，也直接体现了供水管理水平的高低。传统供水厂，特别是中小供水厂所普遍采用的恒速泵加压供水方式存在效率较低、可靠性不高、自动化程度低等缺点，难以满足当前经济生活的需要。随着人们对供水质量和供水系统可靠性要求的不断提高，需要

7、利用先进的自动化技术、控制技术以及通讯技术，要求设计出高性能、高节能、能适应供水厂复杂环境的恒压供水系统成为必然趋势。本文首先根据管网和水泵的运行特性曲线，阐明了供水系统的变频调速节能原理;从具体分析了变频恒水压供水的原理及系统的组成结构，提出不同的控制方案，通过研究和比较，得出结论:变频调速是一种优于调压调速、变极调速、串级调速、机械调速等的调速方式，是当今国际上一项效益最高、性能最好、应用最广、最有发展前途的电机调速技术.它集微机控制技术、电力电子技术和电机传动技术于一体，实现了工业交流