文档介绍：第21 卷第4 期浙江水利水电专科学校学报 Vol .21 No .4
2009 年12 月 Wat . Cons & Hydr .College Dec .2009
基于 PLC 与变频器的恒压供水节能技术研究
王红梅, 方贵盛
( 浙江水利水电专科学校, 浙江杭州 310018)
摘要: 针对传统供水方式的缺点, 提出了基于 PLC 和变频器的恒压供水改造方式. 分析了恒压供水系统的节能原理,
设计了系统的硬件电路图, 提出了系统的软件设计方法, 给出了系统的控制流程图. 经实际运行证明, 改造后的供水系
统控制简单、可靠性高、保护功能完善、节电效果显著.
关键词: 恒压供水; 节能原理;PLC; 变频调速
中图分类号:TV131 文献标志码: A 文章编号:1008 - 536X( 2009) 04-0026-03
Energy-savi ng Technol ogy i n Const ant Pressure Water Supply
Based on PLC and Frequency Convert er
WANG Hong- mei , FANG Gui-sheng
( Zhejiang Water Conservancy and Hydropower College , Hangzhou 310018 , China)
Abstract :The paper presents the water supply method under constant pressure based on PLC and frequency converter , compared with
the ings of traditional water supply. The principle of energy-savingis analyzed and the hardware circuit diagramof the systemis
designed . Moreover , it proposes the software design method as well asthe flow chart of the control system. It proves bythe actual opera-
tion that the water supply systemis controlled si mply with high reliability , perfect protection function and significant energy-saving effect .
Key words :constant pressure water-supply; energy-saving principle ; PLC; variable-frequency speed governing
Q1/ Q2 = n1/n2
引言
0 2
H1/ H2 = ( n1/ n2) ( 1)
目前, 居民生活用水和工业用水增长幅度日益加 3
N1/ N2 = ( n1/ n2)
大. 由于居民日常生活用水会随季节、昼夜