Transcript Stellar Tech Presentation

Who is Stellar Tech?
 Stellar Tech Energy Services is a wholly owned
Canadian company
 Manufacturer of WellMax Datalogger / Controller
 Specializing in the integration and distribution of VFD’s
and motors .
 Strengths in Pumping Systems
 Oil, Water, and Municipal
What we do!
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Oil & Gas production pumping
Commercial Pumping
Municipal Pump Controls
Datalogging and Control
Work in a Global Market
Our Capabilities
 Variable frequency drive (VFD) systems design
and integrator .
 Over 15 years experience in drives and automation
 Thousands of successful installations
 Complete systems integrator with design,
manufacturing, start-up and service capabilities
Our Products
 WellMax Datalogger
 Variable Frequency Drives
 Down hole Pressure / Temperature Recorders
Our Strengths
 All products are manufactured to the highest quality standards
 Knowledgeable customer service representatives and technical
support groups
 Worldwide commitment to customers with sales and service
facilities around the globe
WellMax Datalogger / Optimizer / Controller
 Designed and engineered for pumping
applications to optimize production
 Can be used with VFD’s , Hydraulics or
Across the line / Motor starter.
Extensive options available
 Drive / motor control
WellMax Features
Rod protection
Well OPTIMIZATION
Immediate data storage and
retrieval
Fluid level control
Pump off
Multiple communication features
and protocols
Trend analysis
Screen for on-site data viewing
Well Conditions
WellMax
Data Logger and Controller
Equimavenca – Capital Nacional
Levantamiento Artificial / Servicio Integral
LEVEL AND RPM
CONTROL
Pump Off – Complete Overview
A–SPEED CHANGE
LEADING UP TO A PUMPOFF CONDITION
B-PRESCO FAULT
E-BROWN
OUTS
G-PUMPOFF
OCCURS
C-POWER BUMP
D-PRESCO
F-PUMPOFF
SIGNS
A - Speed Change
B - Presco Fault
C - Presco Fault
D - Power Bump
E – Power Brown Outs
F – Signs of Pump-off or Pump Damage
G – Pump-off occurs
Tubing Leak
Significant drop in torque
displays tubing leak
Torque fluctuations are caused by
excess volume of gas
Tubing Leak
Significant drop in torque
displays tubing leak
Tubing Hair line fracture
The increase of RPM caused enough pressure
to open up the hair line fracture in the tubing,
flow decreased but never completely stopped
Sand Avalanche
Pump is full of sand
Pump slowly filling with
sand
Pumped Off Well
Pump Off Occurs
80 Ft Lbs
75 Ft Lbs
Waxing Condition
Parted Rods
WellMax Menu Structure
SUMMARY REPORT
NEMA 3R Panel
VERTICAL NEMA 1
Unwired 3 Contactor Bypass Package
Showing
Fused Disconnect
Line Reactor
Contactors
O/L
IEEE 519
The total harmonic voltage distortion at any point
of common coupling with a nominal voltage of
less than 66kV shall not exceed 5%.
Point of Common Coupling (PCC): That busbar
electrically closest to any consumer through
which any current must flow to that consumer
and one or more other consumers.
Square Wave Harmonics Content
Square wave & Fundamental + 3rd
S um of 3 H arm onic s
1.5
1.5
1.0
1
0.5
Amplitude
0.5
0
0
-0.5
-0.5
-1
-1.0
-1.5
-1.5
0
0
0.5
0.5
Tim e
1
1.5
1.0
1.5
Types of Harmonic Filters
 A VFD with no input reactor or filter may result in 100%
THID or more, measured at the VFD input terminals
 A 3%Z line reactor will limit THID to 35~ 40%
 A 5%Z line reactor will limit THID to 30 ~ 35%
 A 5%Z line reactor & 3%equivalent Z DC reactor will limit
THID to 25~30%
 Tuned 5th harmonic trap will limit THID to 20 ~ 25%
 12 pulse phase shifting will reduce THID to a minimum of
12% @ full load
 18 pulse phase shifting will reduce THID to a minimum of
5% @ full load
 Matrix wide spectrum filter limits THID to 8% or 5% at full
load
Reducing Harmonics
Ensure a low network Impedance
Distribute harmonic generating loads
Use AC line or DC link reactors
Install Harmonic filters
Motor Inverter Compatibility Topics
 Reflected Wave Theory
 Waveform Analysis with output
reactors & filters
 Long Motor Leads
 Drive Solutions
 Motor Solutions
Reflected Wave Theory
Mismatch between surge impedance of:
Drive-to-motor cable & Motor winding
 Cable surge impedance fairly constant through hp range
 Motor surge impedance inversely proportional to hp
 2 per unit voltage evident on motors up to 500 hp
 Motor terminal voltage doubling on leads over 15 feet
PWM Waveform
1.0
-1.0
Full Voltage, 60 Hz PWM Waveform
1.0
-1.0
Half Voltage, 30 Hz PWM Waveform
VFD Output & Motor Terminal Voltage,
Reflected Waves
IGBT VFD, Motor Terminal Peak Voltage &
Rise Time Characteristics
 Peak voltage = twice DC Bus voltage at
critical cable length and longer. DC bus
voltage = AC input voltage * 1.414.
 e.g. 600 VAC * 1.414 = 850 * 2 =1,700 V
Peak.
 Rise time = 0.015uS to 1uS Depending on
IGBT Current Rating
 Critical cable length = speed of
propagation * rise time.
 e.g. 150meters/uS * 0.03uS = 4.5 meters
IGBT VFD, Motor Terminal Voltage, 10 HP, 460 Volt, 6 KHz Carrier Frequency, 60
Hz Output Frequency, No Load Reactor, 10 Feet of Cable, Peak Voltage 1,200
Volts, Rise Time .03uS
IGBT VFD, Motor Terminal Voltage, 10 HP, 460 Volt, 6 KHz Carrier Frequency, 60
Hz, 3%Z Load Reactor, 10 Feet of Cable, Peak Voltage 820 Volts, Rise Time 2uS
IGBT VFD, Motor Terminal Voltage, 10 HP, 460 Volt, 6 KHz Carrier Frequency, 60
Hz Output Frequency, Sine Wave Output Filter, 10 Feet of Cable, RMS Voltage 460
VAC, No Spikes
IGBT VFD, Motor Terminal Voltage, 10 HP, 460 Volt, 6 KHz Carrier Frequency, 60
Hz Output Frequency, No Load Reactor, 250 Feet of Cable, Peak Voltage 1380,
Rise Time .05uS
IGBT VFD, Motor Terminal Voltage, 10 HP, 460 Volt, 6 KHz Carrier Frequency, 60
Hz Output Frequency, 3%Z Load Reactor, 250 Feet of Cable, Peak Voltage 1,000
Volts, Rise Time 10uS
IGBT VFD, Motor Terminal Voltage, 10 HP, 460 Volt, 6 KHz Carrier Frequency, 60
Hz Output Frequency, Sine Wave Output Filter, 250 Feet of Cable, RMS Voltage
460 VAC, No Spike
Long Cables
 From critical cable length and longer, motor
terminal voltage remains at 2 per unit
 Time spent at 2 per unit voltage increases with
cable length therefore transient energy level much
higher
 Insulation stress much higher
 proportional to transient energy*carrier
frequency
NEMA Minimum Design Standards For 3 Phase Induction
Motors
MG1 part 30
As a minimum
motor insulation
must withstand
MG1 part 31
As a minimum
motor insulation
must withstand
 1000 volt peak @
 2uS rise time
 1600 volt peak @
 0.1uS rise time
VFD Solutions
For NEMA MG1 part 30 Motors
 No output reactor or filter required for 208/240Volt
applications
 Use output reactor for 460 volt applications
 Use output dv/dt filters for 575 volt applications
 Keep motor leads short
 Keep carrier frequency low
 Keep motor cool
Motor Solutions
For NEMA MG1 part 31 Motors
 No output reactor or filter required for 208/240
volt applications
 No reactor or output filter required for 460 volt
applications unless cable length is extreme
 Use output reactor for 575 volt applications
END OF PRESENTATION
THANK YOU