变频电潜泵相似理论课件

Click to edit Master title style,Click to edit master text styles,Second level,Third level,Fourth level,*,/33,*,REDA Production System Variable Speed Drive,REDA Production System Variabl,State of the Art Technology,High Performance,Reliable,V,ariable,S,peed,D,rive,SWD Flux Vector VSD,State of the Art Technology,2,What does the VSD do for us,Provides constant torque through the entire speed range,Can be used manually to set the V/Hz ratio for specific applications(Base Speed),Provides reduced starting capabilities(Soft Start),Optimizes the output of the well(Avoids cycling of the well and equipment),What does the VSD do for usPro,3,Why use a VSD in your application?Flexibility to the system:,Provide lightning protection for the downhole equipment,Eliminate the need for chokes in the system,Provide inherent soft start no inrush currents.,Protect the downhole equipment from pump off,Enable remote operation/automation,Enable smooth response to torque changes,Why use a VSD in your applica,4,Slow acceleration ramp ultimately reduces pump wear,prevents sand infiltration,to increase run life,Reduces downtime and maintenance,AND!,Speedstar 2000 can catch a back-spinning motor!(patent pending),Speedstar 2000 can provide Tracking underload.,Why use a VSD in your application?,Slow acceleration ramp ultimat,5,VSD Output to Motor,The Speedstar 2000 controls the output,Voltage,and,Frequency,to the motor by:,Changing the input AC signal to DC signal,Chopping the resulting DC signal,and finally,Varying the output voltage and frequency to the motor.,By varying the voltage and frequency to the motor,we are changing what is called the V/Hertz ratio.,VSD Output to MotorThe Speedst,6,The increased speed causes the pump to put out more head and flow and,in an effort to obey the laws of physics,the brake horsepower required to do this task also increases.We can predict the change in pump performance with affinity laws.,Sizing a VSD application is then a matter of matching the pump and motor at the speed of interest.,Summary,7,/33,The increased speed causes th,7,VSD Application,VSD Application,8,Flow,HZ,Flow,60,60,HZ,Head,60,Head,HZ,HZ,60,2,BHP,60,BHP,HZ,60,HZ,3,MHP,60,MHP,HZ,60,HZ,If we know the pump performance at 60 Hz,we can correct it to,another frequency by the affinity laws:(1),If we know the motor 60 Hz nameplate rating,we can calculate the,output horsepower rating at any other frequency with:(1),Useful Equations,(1)If we prefer to work with 50 Hz as a base,we can substitute in,50 in place of 60 everywhere it appears in the equations.,9,/33,FlowHZFlow6060HZHead60HeadHZ,9,60,MHP,60,BHP,HZ,60,2,HZ,60,60,MHP,60,BHP,Useful Equations,If we know the pump BHP at 60 Hz and we know what is the,maximum frequency we desire to run at,we can determine,the minimum permissible 60 Hz motor HP rating as:,If we know the pump BHP at 60 Hz and we know what our motor,size is at 60 Hz,we can calculate the maximum allowable,frequency before overloading the motor as:,10,/33,60MHP60BHPHZ602HZ6060MHP60,10,%Load=,BHP,60,MHP,60,60,HZ,2,Volts,Volts,Hz,60,Useful Equations,If we know the voltage at 60 Hz,we can calculate it at another,frequency as:,If we know the pump BHP at 60 Hz and the motor rated Hp at,60 Hz,we can determine the motor load at any frequency as:,60,11,/33,%Load=BHP60 MHP6060HZ2Vol,11,Volts x,KVA,Amps x,1.732,1000,Drive Output KVA=KVA x,?V,480V,Useful Equations,At any frequency,if we know the volts and amps,we can,calculate the KVA as:,480,If we know the drive KVA rating at one input voltage,we can,convert it to another input voltage as:,12,/33,Volts xKVAAmps x1.7321000Driv,12,Hp Limit,Hz,HP Limit,Hz,60,60,HZ,60,60,SHP,60,BHP,Useful Equations,If we know the pump shaft HP rating at 60 Hz,we can convert it,to another frequency as:,If we know the pump shaft HP rating at 60 Hz and the pump BHP,requirement at 60 Hz,we can determine the maximum frequency,allowable before we exceed the shaft capability as:,13,/33,Hp LimitHzHP LimitHz6060HZ,13,VSD APPLICATIONSAFFINITY LAWS,VSD APPLICATIONSAFFINITY LAWS,VSD Applications,The VSD allows a great deal of flexibility in applying pumping equipment to a well.Look at a variable speed pump curve:,15,/33,VSD ApplicationsThe VSD allow,15,Head,Feet,HP,Motor,Load,0,1000,2000,Capacity-Barrels per Day,3000,4000,5000,6000,7000,6500,500,1500,2500,3500,4500,5500,7500,10,20,30,40,50,60,70,2.00,1.00,3.00,Reda Single Stage Pump Performance Curve,GN4000,540 Series Pump-Variable Frequency,Head Capacity,Pump Only Load,70 Hz,65 Hz,60 Hz,55 Hz,50 Hz,70 Hz,65 Hz,60 Hz,55 Hz,50 Hz,16,/33,HeadFeetHPMotorLoad010002000Ca,16,Remember that the SPS motor horsepower output rating will increase directly with the ratio of the frequency.What assumption is this based on?,2,1,HP,HP,2,1,HZ,HZ,1,HP,2,HP,2,1,HZ,HZ,or,VSD Applications,17,/33,Remember that the SPS motor h,17,This assumes the VSD output maintains a,constant volts-to-hertz ratio.,2,1,HP,HP,2,1,HZ,HZ,1,HP,2,HP,2,1,HZ,HZ,or,VSD Applications,18,/33,This assumes the VSD output m