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SWAT Short Circuit Working Group Update

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SWAT Requested document to be referenced as Draft. SWAT Requested Cost Estimate ... DPV2 Case Conversions. 2 Changes made to Aspen. 1 Change made in Cape (for ... – PowerPoint PPT presentation

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Title: SWAT Short Circuit Working Group Update


1
SWAT Short Circuit Working Group Update
  • August 16, 2006
  • Tri-State GT Offices
  • Westminster, Colorado

2
SWAT Short Circuit Working Group (SCWG)
Accomplishments since May SWAT Update
  • 7 meetings held since starting in January
  • Impedance Map Funding Proposal developed
  • Conversion checking of DPV2 case completed (for
    Cape and Aspen)
  • All PTI problems in DPV2 case conversion
    identified
  • Plan for combining cases developed

3
Meeting Schedule
  • January 26, 2006 WAPA - Phoenix
  • February 16, 2006 TEP/UES Tucson
  • March 16, 2006 NPC/SPPC Las Vegas
  • April 20, 2006 SRP Phoenix
  • May 18, 2006 SWRTA Casa Grande
  • June 15, 2006 WAPA Phoenix
  • July 20, 2006 PNM Albuquerque
  • August 17, 2006 APS Phoenix

4
Meeting Minutes and Presentations
5
Impedance Map Development
  • Proposal Developed by the Group
  • SWAT Requested document to be referenced as Draft
  • SWAT Requested Cost Estimate
  • Cost Estimate Developed
  • SWAT Requested clarification of SWRTA
  • Awaiting full Clarification of SWRTA

6
Impedance Map Proposal
7
Impedance Map Cost Estimate
  • Low labor cost 45/hour new engineer or
    draftsman
  • High labor cost 125/hour consultant
  • Low labor cost max time estimate 6 months
  • High labor cost max time estimate 4 months
  • 6moX4wk/moX40hr/wkX45/hr43,200
  • 4moX4wk/moX40hr/wkX125/hr80,000
  • Range 45,000 to 80,000

8
DPV2 Case Conversions
  • 2 Changes made to Aspen
  • 1 Change made in Cape (for different case)
  • 1 Change needed in Aspen or Cape
  • All buses in Cape and Aspen less than 100 A
    difference
  • One of the Aspen changes for PTI conversion
  • Cape identified some problems found due to data
    entry

9
Plan for Case Combining
  • New Process will be quick in the future
  • Distributed work to members
  • All members to identify and change areas and
    zones
  • Tie buses to have common numbers and names
  • Error checking of the cases
  • Checking of equivalent methods
  • Combine the cases

10
Distributed Combining Schedule
  • Each member to combine 2 cases
  • 3 members stated they did not have resources
    (time) to do this
  • 1 member will have to combine 2 cases twice
    (volunteer for this not known yet)
  • Each combination has bus renumbering when
    duplicates
  • Each combination has checking of results
  • Each combination includes SWAT boundary
    equivalents

11
SWAT SCWG Current Work
  • Error Checking Cases
  • Adding Areas and Zones for combining
  • Changing tie bus numbers
  • Equivalents being checked

12
Common Tie Data
13
SWAT SCWG Future Work
  • Finish error checking cases
  • Finish all area and zone entries
  • Finish all common tie bus number entries
  • Finish equivalents checking
  • Combine the cases
  • Common Impedance Maps to be developed
  • Combine case with CCPG Short Circuit Database
    Group Case
  • Develop common study methodologies
  • Standards Review
  • Combine case with STEP SCWG case when formed
  • Present SCWG proposal to NTAC

14
Other Items
15
Other Items
  • WECC RWG SWAT members identified
  • Alberta ISO requested information
  • IEEE Switchgear SWAT members identified
  • IEEE PSRC SWAT members to be identified
  • NPC/SPPC Short Circuit Planning Study Group to be
    started (East Valley)

16
Website address
  • http//www.oatioasis.com/WALC/WALCdocs/page1.htm
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