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1、1外文文獻(xiàn)原稿和譯文外文文獻(xiàn)原稿和譯文原稿Thewatersupplysystemisthenationalproductionlifeindispensableimptantoneannulus.Thetraditionalmethodofwatersupplyareawaterpollutioninfrastructureinvestmentbutthemaindrawbackisthatwatercannotbekeptconst

2、antcausingpartoftheequipmentcannotwknmally.VariablefrequencyspeedcontroltechnologyisanewmatureACmotsteplessspeedregulatingtechnologyitsuniqueexcellentcontrolperfmanceiswidelyappliedtothespeedcontrolfieldespeciallyinwater

3、supplyindustry.Duetothesafetyinproductionthewaterqualityofspecialneedsfconstantpressurewatersupplywiththestringentrequirementssothefrequencycontroltechnologyhasbeenmeindepthapplication.Constantpressurewatersupplywaystoad

4、vancedtechnologyconstantpressureconvenientoperationreliableoperationenergysavinghighdegreeofautomationinpumpstationwatersupplycanperfmthefollowingfunctions:(1)tomaintainconstantpressure(2)thecontrolsystemcanbemanualautom

5、aticoperation(3)apluralityofpumpautomaticswitchoperation(4)systemofsleepwakewhenpeoplestopwhenwaterthesystemisinasleepstateuntilthewaterdemautomaticallywake(5)adjuststhePIDparametersonline(6)pumpunitcircuitprotectiondete

6、ctionalarmsignaldisplay.Theactualpressureofthepipewkfeedbackagivenpressurewerecomparedwhenthepressureofapipewkislowincreasetheoutputoffrequencyconverterpumpspeedfasterwatersupplyquantityincreasesfcingthepipewkpressureris

7、e.Vicepumpspeedslowdownreducethewatersupplypipewkpressuretokeeptheconstantpressurewatersupply.SystemhardwarestructureSystemusesapressuresensPLCinverterasacentralcontroldevicetoachieveadesiredfunction.Source:wktransmissio

8、ndistributionequipment3betweentheconcentratedreflectioninwatersupplypressurenamelywaterwatersupplyislessthelowpressurelesswaterconsumptionwatersupplythepressure.Keepthewaterpressureconstantcanmakethewatersupplywaterbalan

9、cebetweenwatersupplywaterfalongtimethatislesswaterwhenthewaterislesssoastoimprovethequalityofwatersupply.Constantpressurewatersupplysystemftheuserisveryimptant.Inproductionlivingwaterifwatersupplyduetoinsufficientpressur

10、eshtofwatermayaffectthequalityoflifeseriouswhencaninfluencethesurvivalsafetysuchaswhenafireoccursifthewaterpressureisinsufficientwatersupplycanquicklyfiremaycausesignificanteconomiclossescasualties.Therefewaterareabymean

11、sofArtsistheconstantpressurewatersupplysystemcanproducegreateconomicbenefitsocialbenefit.Withthedevelopmentofelectricpowertechnologyfrequencyconversiontechnologyperfectedwithvariablefrequencyspeedcontrolastheceoftheintel

12、ligentwatercontrolsystemreplacedtheprevioushighlevelwatertankapressuretankwatersupplyequipmentstablestartingthestartingcurrentcanbelimitedwithinspecifiedcurrenttherebyavoidingthestartingtimeoftheimpactofpowergridbecauset

13、heaveragerotationalspeedofpumpisreducedwhichcanextendthepumpsvalvesotherthingsoflifetoeliminatethestartstopofthewaterhammereffect.Thestablesafeperfmancesimpleconvenientoperationcompletethoughtfulfunctionwillmakethewaters

14、upplywaterconservationenergysavinglabsavingultimatelyachieveefficientoperation.ⅡTheapplicationofvariablefrequencycontrolconstantpressurewatersupplymodeUsuallyinthesamewayinthewatersupplysystemsettingmultiplecommonpumpwat

15、ersupplywhenthequantityofmultipumpfullopenwatersupplyononetwohours.Inthevariablefrequencyspeedcontrolfconstantpressurewatersupplyintwowaysoneisallpumpswithafrequencyconvertereachwaterpumpwithafrequencyconverter.Afteramet

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