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Advantages of theVariable Frequency Generator (VFG)©

© Worldwide Patent Pending

Presented By: •Juergen Schulz, Canadian Advanced Inc.

Paper Authored By: •Andy Limanowka, Canadian Advanced Inc.•Dana Pettigrew, Nexen International Petroleum


What is a VFG

VARIABLE FREQUENCY GENERATOR (VFG)

• Power Generator that varies Frequency and Voltage output

• Operates 30-70 Hz, 400-5000 Volts• For use with ESP’s & other Variable Torque Loads

requiring variable speed• Eliminates Variable Speed Drive and Transformer• Developed by: Canadian Advanced Inc. • With Nexen International & Finning Canada (Caterpillar)


How the VFG works

• Reduced Speed Start• Reduced Voltage Start • Control Module controls:

– Voltage, Current & Hz (RPM)– Diesel or Natural Gas Engine

with Governor– Motor Protection– SCADA/Communication

PowerGenerator

GeneratorControl/Motor

ProtectionWell

ES

P


Start-up traces (40Hz Ramp Start)

Ramp StartNominal full load Volt 3480V@60HzNominal full load Amps 90A@60Hz

2sec for system stabilizationsinrush current 2.4 x full load current

0

500

1000

1500

2000

2500

3000

3 4 5 6 7 8 9 10 11 12 13 14 15

TIME [s]

VOLT

S

0

20

40

60

80

100

120

140

160

180

200

AM

PS

Gen Volts Gen Current

3508 CAT; 12000 BPD pump and 644HP/3480V/117A motor


Advantages of VFG

• Lower Capital & Maintenance Cost• More Efficient System, less Diesel fuel• Smaller Engines required to Drive Large

ESP’s• No Harmonics, spikes or mirroring• Increase Production• Easy to Use – Fully Integrated System • Touch Screen Operation


VFG Advantages

• Improved Run Times• Voltage / Current Optimization• Hard Starting Advancements• Recoverable Asset (Compared to High Line)• Smaller Foot Print-Offshore Applications


System Comparison

PowerGenerator

VariableSpeedDrive

LoadFilter

Step-UpTransformer

PowerGenerator

GeneratorControl/Motor

Protection

Typical Variable Speed Drive System

Variable Frequency Generator System (Less Equipment)

Typical Switchboard System

PowerLine

Switchboard

Step-UpTransformer

ESP

ESP

ESP


Lower Capital / Maintenance cost

• Engine Matched to Full Load of ESP• Low frequency Soft Start-up

– No Need to Oversize Engine– VFG = 2.5 X Nameplate Current– Switchboard = 6-8 X Nameplate Current

• Eliminates VFD & Transformer Capital Cost• Eliminates VFD Maintenance Cost


Capital cost comparison

Capital Cost Comparison, 3512 CAT 900 ekW

Engine&

Generator

Engine&

Generator

VFGController

VFD&

Step-up Transformer

Traditional VFD VFG System


Maintenance cost comparison

Maintance Cost Comparison, 3512 CAT 900 ekW

Engine&

Generator

Engine&

Generator

VFD&

Step-up Transformer

VFG Controller

Traditional VFD VFG


Fuel cost comparison

Fuel Cost Comparison, 3512 CAT 900 ekW

VFGFuel

Consumption

TraditionalVFDFuel

Consumption

Traditional VFD VFG


Output Waveform VFD vs VFG

Typical VFD Output Waveform - Unfiltered

Typical VFG Output Waveform


Improved Run Times

• Soft starts reduce shaft stress• Cable runs cooler – longer life• Motor runs cooler – longer life• No voltage spikes – ideal sine wave w/o any filter

RESULTS: Longer ESP Electric and Mechanical System Life – Reduced Electrical Losses


Increased Production (Heijah 49)

• Improve Efficiency by 5-10% – Less Heat!• VFG eliminates Heat and Turns to Oil Production• Example for Maximum of 3508 CAT Diesel Generator, 562 Series

CKC12000, 650 hp ESP

VFG System

Maximum Frequency = 63 Hz

Gross Fluid = 12,400 bbl/day

Net Oil (90%WCT)=1240 bbl/day

Traditional VFD & Transformer

Maximum Frequency = 58 Hz

Gross Fluid = 11,600 bbl/day

Net Oil (90%WCT) =1160 bbl/day

• Production increase of 80 bbl/day of oil• At $ 65/bbl add’l revenue of $ 5.200 per day• Increase of annual revenue of over $ 1,8 Mio.• Return of initial CAPEX in less than 3 months


Increased Production (Qataban 11)

0

1000

2000

3000

4000

5000

6000TD

H, f

t

0 5000 10000 15000 20000 25000Liquid + Gas Rate, Bbl/D

CLift 562 KC16000 / 86 Stgs / 57.0 HzPump Performance (TDH @ Design) Q11 VFG TEST.sp7

Reg: Nexen Inc. - Nexen Inc.Pump Curve , Case 1 Well System Curve , Case 1, (Truncated)Pump Curve , Case 2 Well System Curve , Case 2, (Truncated)Min-Max Optimum Rate

•On a VSD at 114 Amps and 57.0 Hz, 18,250 bfpd RED SOLID LINE•On a VFG at 114 Amps and 59.0 Hz, 19,550 bfpd BLUE DASHED LINE•VFG measured benefit of an extra 1,300 bfpd for a 7.1% increase.


VFG

Entire unit prepared for shipment


VFGControl panel during testing


VFG

Canadian Nexen Yemen (Heijah 49)


VFGTouch-pad controls


VFG

Touch-pad controls


When to use a VFG

• Every time a Generator is used on an ESP• Temporary or Permanent Installation• Portable Well Testing• Areas of Power Quality Problems• Weak or Insufficient Supply Power• Other Applications – PCP, Beam Pump, Ships, Fans, etc.


Questions

For more information or pricing contact:

Juergen Schulz or Sid Degen

CANADIAN ADVANCED INC.CANADIAN ADVANCED INC.5307-72A AVENUEEDMONTON, ALBERTA, T6B 2J1PHONE: 780-469-0770FAX: 780-450-4592


Thank you for your attention

Advantages of the Variable Frequency Generator (VFG)© · PDF fileAdvanced Thinking >>>...

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