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ABSTRACTBuildingtheconservation-orientedsociety,thereasonabledevelopment,savesandtheeffectiveprotectingwaterresourcesisanarduoustask.Becentralizedaccordingtotheuniversitywaterusedtime,thewaterconsumptionchangemajorcharacteristic,analyzedthecampusoriginalwatersupplysystemexistencecosttobehigh,thereliabilitywaslow,thewaterresourceswaste,thepipenetworksystemtreatedtheconsummationthequestion.Proposedthatdrawswaterthewaywhichusingtherunningwaterhydraulicpressurewatersupplyandthewaterpumpunifies,andmatchesbytheinverter,thesoftstarter,PLC,Microrevealsthecompensator,thepressuretransmitter,thefluidpositionsensorandsoon.accordingtothenetworkmanagementpressure,controlswaterpump'srotationalspeedthroughtheinverter,causesinwaterpipe'spressuremaintainsatthroughouttheappropriatescope,thusmaysolvetheproblemwhichthefloorhighpressureistooinsufficientwhensmallcurrentcapacitytheenergyconsumptionisbig.Moreoverthewaterpumpconsumestheelectricpowerandtheelectricalmachineryrotationalspeedisproportionalthreecubedtherelations,thereforethewaterpumpvelocitymodulationmovement'senergyconservationeffectisobvious,theaveragepowerconsumptionusualwatersupplywaysaves40%.Theunionusestheprogrammablecontroller,mayrealizethemainpumpfrequencyconversion,theauxiliarypumpsoftstart,hastheshortcircuitprotection,theoverflowprotectionfunctionstably,theworkreliable,lengthenedelectricalmachinery'sservicelifegreatly.Keywords:Constantpressurefrequencyconversionwatersupply,PLC,differentialpressurewatersupply,automaticcontrol目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc200952745"摘要PAGEREF_Toc200952745\hIHYPERLINK\l"_Toc200952746"ABSTRACTPAGEREF_T