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1、摘要摘要建设节约型社会，合理开发、节约利用和有效保护水资源是一项艰巨任务。根据高校用水时间集中，用水量变化较大的特点，分析了校园原供水系统存在成本高，可靠性低，水资源浪费，管网系统待完善的问题。提出以利用自来水水压供水与水泵提水相结合的方式，并配以变频器、软启动器、PLC、微泄露补偿器、压力传感器、液位传感器等不同功能等传感器，根据管网的压力，通过变频器控制水泵的转速，使水管中的压力始终保持在合适的范围。从而可以解决因楼层太高导致压力不足及小流量时能耗大的问题。另外水泵耗电功率与电机转速的三次方成正比关
2、系，所以水泵调速运行的节能效果非常明显，平均耗电量较通常供水方式节省近四成。结合使用可编程控制器，可实现主泵变频，副泵软启动，具有短路保护、过流保护功能，工作稳定可靠，大大延长了电机的使用寿命。关键词：恒压变频供水，PLC，压差供水，自动控制-7-ABSTRACT-7-ABSTRACTABSTRACTBuildingtheconservation-orientedsociety,thereasonabledevelopment,savesandtheeffectiveprotectingwaterres
3、ourcesisanarduoustask.Becentralizedaccordingtotheuniversitywaterusedtime,thewaterconsumptionchangemajorcharacteristic,analyzedthecampusoriginalwatersupplysystemexistencecosttobehigh,thereliabilitywaslow,thewaterresourceswaste,thepipenetworksystemtreatedt
4、heconsummationthequestion.Proposedthatdrawswaterthewaywhichusingtherunningwaterhydraulicpressurewatersupplyandthewaterpumpunifies,andmatchesbytheinverter,thesoftstarter,PLC,Microrevealsthecompensator,thepressuretransmitter,thefluidpositionsensorandsoon.a
5、ccordingtothenetworkmanagementpressure,controlswaterpump'srotationalspeedthroughtheinverter,causesinwaterpipe'spressuremaintainsatthroughouttheappropriatescope,thusmaysolvetheproblemwhichthefloorhighpressureistooinsufficientwhensmallcurrentcapacitytheene
6、rgyconsumptionisbig.Moreoverthewaterpumpconsumestheelectricpowerandtheelectricalmachineryrotationalspeedisproportionalthreecubedtherelations,thereforethewaterpumpvelocitymodulationmovement'senergyconservationeffectisobvious,theaveragepowerconsumptionusua
7、lwatersupplywaysaves40%.Theunionusestheprogrammablecontroller,mayrealizethemainpumpfrequencyconversion,theauxiliarypumpsoftstart,hastheshortcircuitprotection,theoverflowprotectionfunctionstably,theworkreliable,lengthenedelectricalmachinery'sservicelifegr
8、eatly.Keywords:Constantpressurefrequencyconversionwatersupply,PLC,differentialpressurewatersupply,automaticcontrol-7-目录-7-目录目录摘要IABSTRACTII目录III第一章绪论-1-1.1恒压供水问题的提出-1-1.2国内恒压供水系统的现状-2-1.2.1国内恒压供水系统研究状况-2-1.2.2各类供水系统的比较-3-1
