Network Protector Enabled Generation NPEG

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Network Protector Enabled Generation
(NPEG) For Spot Networks Presented by James M.
Bing, PE New Energy Options, Inc. 410 Great
Road, B-6 Littleton, MA 01460 jbing_at_newenergyopti
ons.com   On behalf of Massachusetts Technology
Collaborative Renewable Energy Trust 75 North
Drive, Westborough, MA 01581-3340  Francis H.
Cummings, Policy Director cummings_at_masstech.org F
ebruary 4, 2007
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Network Protector Enabled Generation (NPEG)
Framework

• Conceptual Performance Specification
• Recommended practice approach
• Focus on outcome, not method
• Not prescriptive/proscriptive
• Adapted to utility, site, NP DG equipment
• accomplished without requiring any changes to
  prevailing network protector clearing time
  practices of the Area EPS

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Based Upon Massachusetts Study Generation
Monitoring and Modeling of Feeder Fault Cases

• GSA Williams Building study (5/05)
• Two year study of two DG systems on Boston
  2-transformer Spot network (May 2003 - Feb. 2005)
• Prototype demonstration of Advanced Network
  Protector or Network Protector Enabled Generation
  (NPEG)

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Key Technical Features of NPEG

• Technical Concept
• Provides Operational Strategy
• Provides coordination of DG with NP timing
  capabilities
• Provides sensing and monitoring at the NP
• Directional power High and Low
• Forward underpower
• Closed NP sensing
• Provides control of customer-sited DG by the
  utility NP across the PCC
• Provides ownership and maintenance of monitoring
  and control equipment by the utility

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SPOT NETWORK WITH DG NPEG CONTROL
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SPOT NETWORK WITH DG OF ANY KIND WITH CUSTOMER
OWNED POWER CONVERTER
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SPOT NETWORK WITH DG OF ANY KIND WITH CUSTOMER
OWNED SOLID STATE SWITCH
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NPEG ZONES OF PROTECTION
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NPEG TRIPS DG ON FORWARD UNDERPOWER
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NPEG TRIPS DG FOR LOW REVERSE POWERNP REMAINS
CLOSED
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NPEG TRIPS DG FOR HIGH REVERSE POWER NP OPENS
INSTANTANEOUSLY
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NETWORK PROTECTORDELAYED OPENING TIME/CURRENT
THRESHOLDS
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ADJUSTABLE NETWORK PROTECTOR DELAYED OPENING
TIME/CURRENT THRESHOLDS
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Questions Follow-Up

• James M. Bing, PE
• New Energy Options, Inc.
• 410 Great Road, B-6
• Littleton, MA 01460
• 978-952-2444
• jbing_at_newenergyoptions.com
•  
• Francis H. Cummings
• Massachusetts Technology Collaborative
• Renewable Energy Trust
• 75 North Drive, Westborough, MA 01581-3340
• 978-985-1557
• cummings_at_masstech.org