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Presentation to Artificial Lift Forum
           November 2011

UL 1741 Distributed Generation Standard

        Ronald A. Dombrowski,
         Vice President, CCW
What is UL1741 and why should I care?
UL 1741 is the standard that inverter-based
generators must meet to put electricity on the
grid…

…and get paid for it.
You should care about UL1741 because up to
40% of the energy you are putting into your
beam pumps may be recovered with a
regenerative drive system.

With a UL 1741 certified system, that can come
right off your electric bill.
You should care about UL1741 because up to
40% of the energy you are putting into your
beam pumps may be recovered with a
regenerative drive system.

With a UL 1741 certified system, that can come
right off your electric bill.
Distributed Generation in TEXAS
• Distributed Generation:
    An electrical generating facility located at a
    customer's point of delivery (point of common
    coupling) of ten megawatts (MW) or less and
    connected at a voltage less than 60 kilovolts (kV)
    which may be connected in parallel operation to
    the utility system.
Distributed Generation in TEXAS (con’t)
• The Public Utility Commission of Texas (PUCT)
  encourages the use of distributed resources.
• Texas Public Utility Regulatory Act (PURA) of
  1999 includes customer rights and safeguards
• Section 39.101(b)(3) of PURA states “A
  customer is entitled to have access . . . to on-site
  distributed generation . . .”
Distributed Generation in TEXAS (con’t)

• The PUCT established Substantive Rules for
  interconnecting distributed generation.

• Substantive Rules Sections 25.211 and 25.212 address:
   – Technical Aspects
   – Procedural Aspects
  for interconnection of distributed generation.
Distributed Generation in TEXAS (con’t)
• The PUCT established Safety Requirements for
  interconnecting distributed generation.

• Safety Requirements ensure DG is designed and
  installed in a way that:
  – is not a safety hazard to utility personnel, equipment or other
    customers
  – Does not disturb other customers or degrade quality of
    distribution system
  – Provides reliable service to DG owner and utility
Distributed Generation in TEXAS (con’t)

• UL 1741 forms a part of the Safety Requirements

• Virtually all Texas utilities require compliance with UL
  1741 standards
Distributed Generation in NEW MEXICO
17.9.568.8 APPLICABLE CODES AND STANDARDS:
   B. In order to qualify for any interconnection procedures,
     each generating facility generator shall be in
     conformance with the following codes and standards
     as applicable:
   (3) UL 1741 Inverters, converters and controllers for use
     in independent power systems or equivalent.

TITLE 17  PUBLIC UTILITIES AND UTILITY SERVICES
CHAPTER 9 ELECTRIC SERVICES
PART 568  INTERCONNECTION OF GENERATING FACILITIES WITH A RATED CAPACITY UP TO AND INCLUDING 10 MW
          CONNECTING TO A UTILITY SYSTEM
UL 1741
• UL 1741 (Second Edition, January 28, 2010)
  incorporates:

  – IEEE 1547 – Standard for Interconnecting Distributed Resources
    with Electric Power Systems

  – IEEE 1547.1 – Standard for Conformance Testing Procedures for
    Equipment Interconnecting Distributed Resources.
UL 1741
• UL 1741 (2nd Edition) also includes requirements for:

  – Construction, materials, wiring, component spacing, etc.
  – Protection against risks of injury against persons
  – Output characteristics and utility compatibility (includes IEEE
    1547)
  – Rating, Marking
  – Specific Tests for various technologies (PV, Wind, Microturbine,
    Fuel Cell Engine, etc.)
UL 1741

• The CCW regenerative Enersaver Power II has
  been tested and certified compliant with the
  requirements of the stringent UL 1741 standard
  (2nd Edition).
• This testing has certified the Enersaver Power II
  meets the standards for alternative energy,
  distributed and grid parallel generation systems.
UL 1741



• The Enersaver Power II is the first, and currently
  the only drive system which complies with this
  important standard.
UL 1741 Key Requirements
Harmonic Distortion of less than 5% I-THD

• The measured total harmonic distortion of the current
  output from inverters must be below 5%.
• The power coming on to the grid is expected to be clean
  and not interfere with the operation of the electric
  system.
UL 1741 Key Requirements
Oilfield Power2<Enersaver>




THD taken with Enersaver -VFD running at 60HZ, snap shot
represents a 20 minute capture.
This is 4.5% THD for Current .. 0.8% THD for Voltage
UL 1741 Key Requirements
Anti-Islanding Verification Test

• This standard ensures that the inverter will properly shut
  down during a power interruption and isolate itself from
  the electric grid.
• This standard is of utmost importance to electric
  distribution companies as it relates to safety for their
  workers.
UL 1741 Key Requirements
Frequency variation test

• The inverter must pass a series of simulated tests to
  adjust to the frequency of the grid AC power within
  specified time standards.
UL 1741 Key Requirements
Line/Grid Synchronization Tests

• The inverter system must be able to automatically
  synchronize to the grid under many different conditions.
UL 1741 Key Requirements
Dielectric Voltage Withstand Test

• The inverter must be able to withstand 1,000 volts plus
  twice the rated voltage of the inverter between the input
  stage and ground, the output stage and ground, and
  between the input and output stages.
UL 1741 Key Requirements
Other Tests Performed for UL 1741
Compliance:
•   Voltage Variation Output Test
•   Component Short Circuit Test
•   Loss of Control Circuit Test
•   Temperature Withstand Test
•   Line/Grid Interactive Test
UL 1741 Key Requirements
Other Tests Performed for UL 1741
Compliance:
•   Voltage Variation Output Test
•   Component Short Circuit Test
•   Loss of Control Circuit Test
•   Temperature Withstand Test
•   Line/Grid Interactive Test
UL 1741



• The Enersaver Power II is the first, and currently
  the only drive system which complies with this
  important standard.
Benefits of UL 1741
       Compliant Oilfield Drive Systems

• Regenerate Electricity
  – for Sale back onto Electric Grid
  – Reduce own consumption


• Reduction of energy consumed

• Reduction of demand charges
Oilfield Enersaver
Benefits of UL 1741
       Compliant Oilfield Drive Systems

• Reactive Power (KVARs) go from consuming to
  generating

• Generating KVARs:
  – Decreases current/amperage required for motor work
  – Reduces or eliminates voltage sags
  – Significantly decreases KVA demand charges
Benefits of UL 1741
       Compliant Oilfield Drive Systems

• Clean “Utility Grade” power generated
  – Returned to grid for $$ credit
  – Benefits other electric devices in area
  – active Power (KVARs) go from consuming to
    generating


• “GREEN” Carbon Offsetting Power
Benefits of UL 1741
       Compliant Oilfield Drive Systems

• Increased safety of workers and public

• Opportunities to participate in demand
  reduction/demand response programs

• Provides greater energy efficiency
Benefits of UL 1741
Compliant Oilfield Drive Systems




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Artificial lift forum ul 1741 presentation - final

  • 1. Presentation to Artificial Lift Forum November 2011 UL 1741 Distributed Generation Standard Ronald A. Dombrowski, Vice President, CCW
  • 2. What is UL1741 and why should I care?
  • 3. UL 1741 is the standard that inverter-based generators must meet to put electricity on the grid… …and get paid for it.
  • 4. You should care about UL1741 because up to 40% of the energy you are putting into your beam pumps may be recovered with a regenerative drive system. With a UL 1741 certified system, that can come right off your electric bill.
  • 5. You should care about UL1741 because up to 40% of the energy you are putting into your beam pumps may be recovered with a regenerative drive system. With a UL 1741 certified system, that can come right off your electric bill.
  • 6. Distributed Generation in TEXAS • Distributed Generation: An electrical generating facility located at a customer's point of delivery (point of common coupling) of ten megawatts (MW) or less and connected at a voltage less than 60 kilovolts (kV) which may be connected in parallel operation to the utility system.
  • 7. Distributed Generation in TEXAS (con’t) • The Public Utility Commission of Texas (PUCT) encourages the use of distributed resources. • Texas Public Utility Regulatory Act (PURA) of 1999 includes customer rights and safeguards • Section 39.101(b)(3) of PURA states “A customer is entitled to have access . . . to on-site distributed generation . . .”
  • 8. Distributed Generation in TEXAS (con’t) • The PUCT established Substantive Rules for interconnecting distributed generation. • Substantive Rules Sections 25.211 and 25.212 address: – Technical Aspects – Procedural Aspects for interconnection of distributed generation.
  • 9. Distributed Generation in TEXAS (con’t) • The PUCT established Safety Requirements for interconnecting distributed generation. • Safety Requirements ensure DG is designed and installed in a way that: – is not a safety hazard to utility personnel, equipment or other customers – Does not disturb other customers or degrade quality of distribution system – Provides reliable service to DG owner and utility
  • 10. Distributed Generation in TEXAS (con’t) • UL 1741 forms a part of the Safety Requirements • Virtually all Texas utilities require compliance with UL 1741 standards
  • 11. Distributed Generation in NEW MEXICO 17.9.568.8 APPLICABLE CODES AND STANDARDS: B. In order to qualify for any interconnection procedures, each generating facility generator shall be in conformance with the following codes and standards as applicable: (3) UL 1741 Inverters, converters and controllers for use in independent power systems or equivalent. TITLE 17 PUBLIC UTILITIES AND UTILITY SERVICES CHAPTER 9 ELECTRIC SERVICES PART 568 INTERCONNECTION OF GENERATING FACILITIES WITH A RATED CAPACITY UP TO AND INCLUDING 10 MW CONNECTING TO A UTILITY SYSTEM
  • 12. UL 1741 • UL 1741 (Second Edition, January 28, 2010) incorporates: – IEEE 1547 – Standard for Interconnecting Distributed Resources with Electric Power Systems – IEEE 1547.1 – Standard for Conformance Testing Procedures for Equipment Interconnecting Distributed Resources.
  • 13. UL 1741 • UL 1741 (2nd Edition) also includes requirements for: – Construction, materials, wiring, component spacing, etc. – Protection against risks of injury against persons – Output characteristics and utility compatibility (includes IEEE 1547) – Rating, Marking – Specific Tests for various technologies (PV, Wind, Microturbine, Fuel Cell Engine, etc.)
  • 14. UL 1741 • The CCW regenerative Enersaver Power II has been tested and certified compliant with the requirements of the stringent UL 1741 standard (2nd Edition). • This testing has certified the Enersaver Power II meets the standards for alternative energy, distributed and grid parallel generation systems.
  • 15. UL 1741 • The Enersaver Power II is the first, and currently the only drive system which complies with this important standard.
  • 16. UL 1741 Key Requirements Harmonic Distortion of less than 5% I-THD • The measured total harmonic distortion of the current output from inverters must be below 5%. • The power coming on to the grid is expected to be clean and not interfere with the operation of the electric system.
  • 17. UL 1741 Key Requirements
  • 18. Oilfield Power2<Enersaver> THD taken with Enersaver -VFD running at 60HZ, snap shot represents a 20 minute capture. This is 4.5% THD for Current .. 0.8% THD for Voltage
  • 19. UL 1741 Key Requirements Anti-Islanding Verification Test • This standard ensures that the inverter will properly shut down during a power interruption and isolate itself from the electric grid. • This standard is of utmost importance to electric distribution companies as it relates to safety for their workers.
  • 20. UL 1741 Key Requirements Frequency variation test • The inverter must pass a series of simulated tests to adjust to the frequency of the grid AC power within specified time standards.
  • 21. UL 1741 Key Requirements Line/Grid Synchronization Tests • The inverter system must be able to automatically synchronize to the grid under many different conditions.
  • 22. UL 1741 Key Requirements Dielectric Voltage Withstand Test • The inverter must be able to withstand 1,000 volts plus twice the rated voltage of the inverter between the input stage and ground, the output stage and ground, and between the input and output stages.
  • 23. UL 1741 Key Requirements Other Tests Performed for UL 1741 Compliance: • Voltage Variation Output Test • Component Short Circuit Test • Loss of Control Circuit Test • Temperature Withstand Test • Line/Grid Interactive Test
  • 24. UL 1741 Key Requirements Other Tests Performed for UL 1741 Compliance: • Voltage Variation Output Test • Component Short Circuit Test • Loss of Control Circuit Test • Temperature Withstand Test • Line/Grid Interactive Test
  • 25. UL 1741 • The Enersaver Power II is the first, and currently the only drive system which complies with this important standard.
  • 26. Benefits of UL 1741 Compliant Oilfield Drive Systems • Regenerate Electricity – for Sale back onto Electric Grid – Reduce own consumption • Reduction of energy consumed • Reduction of demand charges
  • 28. Benefits of UL 1741 Compliant Oilfield Drive Systems • Reactive Power (KVARs) go from consuming to generating • Generating KVARs: – Decreases current/amperage required for motor work – Reduces or eliminates voltage sags – Significantly decreases KVA demand charges
  • 29. Benefits of UL 1741 Compliant Oilfield Drive Systems • Clean “Utility Grade” power generated – Returned to grid for $$ credit – Benefits other electric devices in area – active Power (KVARs) go from consuming to generating • “GREEN” Carbon Offsetting Power
  • 30. Benefits of UL 1741 Compliant Oilfield Drive Systems • Increased safety of workers and public • Opportunities to participate in demand reduction/demand response programs • Provides greater energy efficiency
  • 31. Benefits of UL 1741 Compliant Oilfield Drive Systems QUESTIONS?