tss report to pcc
Download
Skip this Video
Download Presentation
TSS report to PCC

Loading in 2 Seconds...

play fullscreen
1 / 22

TSS report to PCC - PowerPoint PPT Presentation


  • 86 Views
  • Uploaded on

TSS report to PCC. June 27-28, 2002 Vancouver, BC. Overview. Late Data Statistics and Procedure Safety Net Task Force Reactive Margin and UVLS Evaluation Under-Frequency Load Shedding Review – Discussion Governor and Load Modeling Program Versions and Conversion Status

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' TSS report to PCC' - kalona


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
tss report to pcc

TSS report to PCC

June 27-28, 2002

Vancouver, BC

overview
Overview
  • Late Data Statistics and Procedure
  • Safety Net Task Force
  • Reactive Margin and UVLS Evaluation
  • Under-Frequency Load Shedding Review – Discussion
  • Governor and Load Modeling
  • Program Versions and Conversion Status
  • Generator Testing Status Report
  • Transmission Project Rating Review
  • Other (PSS assignment &

Bus Section Breaker Failure)

late data statistics and procedure
Late Data Statistics and Procedure
  • Late Data Log & Summary
  • Improvement in responses
  • BPA committed schedule
    • Reduced delays
  • Program success contingent on continued improvement
safety net task force
Safety Net Task Force
  • Assignment from PCC to assess effects of Safety Net Policy
  • New task force chair - Milt Percival (WAPA)
  • Compiling survey results
reactive margin and uvls evaluation
Reactive Margin and UVLS Evaluation
  • Satisfying Recommendations to perform reactive margin studies & evaluate need for implementing UVLS
  • Reactive Margin Studies TF is compiling responses of WECC members
underfrequency load shedding task force
Underfrequency Load Shedding Task Force
  • Work in Progress Draft Report
  • For Southern Island: Existing program meets requirements
  • For Northern Island & Pacific NW: New studies are being corroborated with studies done by BPA
southern island studies
Southern Island Studies
  • Existing program study results:

Loss of COI, NE/SE separation, 30% gen loss

    • Dip to 57.8, Stall at 59.7 Hz (1)
      • generic load shed data
    • Dip to 57.9, Stall at 59.4 Hz (7)
      • existing Master Data File
      • Survey to update data has been sent out
    • Dip to 57.7, Stall at 59.3 Hz (8)
      • ggov1 & FRR units only
generator minimum trip
Generator Minimum Trip

Conflicts with Generators Under-frequency Trip Protection

Table 2. Minimum Off-Nominal Generator Requirements

Underfrequency Limit Overfrequency Limit Minimum Time

60.0-59.5 Hz 60.0-60.5 Hz N/A (continuous

operation)

59.4-58.5 Hz 60.6-61.5 Hz 3 minutes

58.4-57.9 Hz 61.6-61.7 Hz 30 seconds

57.8-57.4 Hz 7.5 minutes

57.3-56.9 Hz 45 cycles

56.8-56.5 Hz 7.2 cycles

Less than 56.4 Hz Greater than 61.7 Hz Instantaneous trip

generator minimum trip1
Generator Minimum Trip
  • Evaluating the increase to Underfrequency Limit floor to > 57 Hz in existing program
  • Cannot increase Underfrequency Limit floor to > 58.2 Hz in existing program - Siemens W501F Gas Turbine
    • Five modifications of Load Shedding to existing program were tested, and failed to hold frequency decline above 58.2 Hz
      • (0.1 Hz, 0.2 Hz, 0.5%, 1%, 0.1 Hz/1%)
siemens w501f generator minimum trip
Siemens W501F Generator Minimum Trip
  • Four options for discussion
  • Raise & increase Load Shed to arrest > 58.2
  • Reduce generation loss planned to cover to < 30%
  • Require control areas to shed load for generators outside Trip Table
  • Require generators to arm load/contract with load for generators outside Trip Table
siemens w501f generator minimum trip1
Siemens W501F Generator Minimum Trip
  • Raise & increase Load Shed to arrest > 58.2
    • Studies suggest adding 2.6% to five load shed blocks
    • Works until generators trip above 58.2 Hz
    • High impact to loads
siemens w501f generator minimum trip2
Siemens W501F Generator Minimum Trip
  • Reduce generation loss planned to cover to < 30%
    • Assume few generators use higher under-frequency threshold
    • Reducing the generation loss assumption
      • Does not change the physical system
      • Raising trip threshold frequency results in higher generation lost, not lower.

(continued)

siemens w501f generator minimum trip3
Siemens W501F Generator Minimum Trip
  • Reduce generation loss planned to cover to < 30%
    • Continuous reductions needed with more generators raising trip settings
    • Can generator manufacturers accept the risk of loss of life for the unit operating outside its design capabilities?
siemens w501f generator minimum trip4
Siemens W501F Generator Minimum Trip
  • Require control areas to shed load for generators outside Trip Table
    • For independent control areas, would the buyer of the output set up load dropping?
    • Is this practical if buyer is a long distance away or changes regularly?
    • How does a single unit control area implement load dropping?
      • What if the load is already part of the utilities UFLS Plan?
siemens w501f generator minimum trip5
Siemens W501F Generator Minimum Trip
  • Require generators to arm load for generators outside Trip Table
    • Economic tradeoff
    • Could the generator contract directly with a load?
    • Is contracting with a specific load to trip physically & technically feasible?
reliability councils ufls programs
Reliability Councils UFLS Programs

Table 3. Summary of Reliability Councils UFLS Programs

Percent (%) Load Shed at Frequency (Hz) Specified Freq. Generator Allowed to Trip

Council 59.7 59.5 59.4 59.3 59.1 58.9 58.8 58.7 58.5 58.3 58.2

NPCC 10 15 57 Hz

ERCOT 5 10 10 57.5 Hz

MAAC 10 10 10 <57.5 Hz

ECAR 5 5 5 5 5 <58.2 Hz

FRCC 9 7 7 6 5 7 <57.5 Hz

WSCC 5.3 5.9 6.5 6.7 6.7 56.4 Hz

  • Choice of options is a Policy Decision
governor and load modeling
Governor and Load Modeling
  • New governor models being tested
    • ggov1 thermal turbine/governor
    • Kaplan type hydro turbine/governor
  • May 18, 2001 Staged Tests being evaluated
  • Load Modeling Task Force (under M&VWG)
    • Evaluating models, e.g. including transformer
    • Evaluating methods to gather & maintain data
program versions and conversion status
Program Versions and Conversion Status
  • GE program version 13 available for WECC since May 29th
  • New cases in version 13, and all current year cases to be converted to version 13
  • PTI power flow cases converted by WECC staff in version 28
  • Staff to begin dynamics conversion by end of summer
generator testing status report
Generator Testing Status Report
  • Completed units in May 2002
    • 1425 units that are 10 MW or higher
    • 1116 units or 78 % have reactive limits tests completed
    • 948 units or 67 % have dynamics data validation completed
  • Summary spreadsheet by company is attached
transmission project rating review
Transmission Project Rating Review

Since last PCC meeting:

  • Entering Phase 1
    • Path 59 - Eagle Mountain 230/161 - Blythe Tie
  • Completing Phase 3
    • Path 8, Northwest-Montana, 1350 MW W-E
    • Path 48, Northern New Mexico Transmission, 1947 MW
    • Path 36, TOT3, 1605 MW North-to-South
pss assignment
PSS Assignment
  • In Section 1 c), clarify the meaning of “complex”
  • Assess whether there is enough PSS on the system, using the latest tools and models
  • Produce a PSS policy that specifies the required performance for each unit rather than dictating the installation of PSS across the board
bus section breaker failure
Bus Section Breaker Failure
  • Studies requested by NERC with waiver
  • RS asked PCC members to report bus section breakers & perform studies
    • TSS formed task force (RS advising)
      • Discuss inventory reporting
      • Study requirements
      • Study methodologies
      • Mitigating measures
    • Provide inventory response by September
ad