Date post: | 12-Feb-2017 |
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Energy Savings usingVariable Frequency Drives (VFDs)on Beam Pumps
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SPOC Automation Who Are We?
• Oil and Gas •Leader in Oilfield Variable
Speed Drives• Specialists in Optimizing Pump
Control with 200+ years of experience• 15+ Years in business• Family Owned• Based in Trussville, AL
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Energy Savings using a VFD
• VFD has Power Factor up to .97, eliminating penalties
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Energy Savings using a VFD
• Power Factor up to .97 eliminates penalties
• Can use NEMA B motors to save 3-5% additional energy
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Energy Savings using a VFD
• Power Factor up to .97 eliminates penalties
• Can use NEMA B motors to save 3-5% additional energy
• VFDs eliminate regeneration
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Energy Savings using a VFD
• VFD can eliminate regeneration
• When the heavier side of an unbalanced beam is moving up, the motor uses power
• When the heavier side of an unbalanced beam is moving down, the motor becomes a generator
• The generator sends power back into the electric grid• The utility does not give credit for this generated “negative” power
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Eliminating wasted energy in regeneration
• Most Beam Pump VFDs use Dynamic Braking to deal with regeneration.
• Brake Resistors increase energy consumption 15-30%
• Iron Horse drives do not require resistors
Eliminating Wasted Energy in Regeneration
• The area in the green is typical lost as heat in a VFD with a brake resistor
• The area in the green is given back to the utility with a starter panel
Wasted Energy
Eliminating Wasted Energy in Regeneration
• Recent Well Test by Laredo Energy in Odessa, 7.1 SPM, 50HP motor
• With starter: 9.7KW of energy • With VFD: 7.3KW of energy
25% reduction in energy cost$4000 per year savings