Cost Estimates. Katherine Prewitt [email protected] Director, Planning. RSC Motions (Oct 2010). 2. MOTION 1 : RSC recommends that SPP review what is the best manner to address significant cost increases and/or overruns of transmission projects that are regionally funded.
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2
3
4
5
9
70
M
$
100
M
$
130
M

30
%
+
30
%
CPE Evaluation Illustrations$105 Million
Study Estimate: $100 Million
$84 M
$105 M
$126 M
CNTC Project Estimate:
Action:
SPP IssuesNTC to DTO
If the +/20% precision bandwidth of the project’s CPE is within the accepted range, an NTC will automatically be issued
70
M
$
100
M
$
130
M

30
%
+
30
%
CPE Evaluation Illustrations$120 Million
Study Estimate: $100 Million
$96 M
$120 M
$144 M
CNTC Project Estimate:
Action:
SPP Reevaluation and BOD Review
If the +/20% precision bandwidth of the project’s CPE is outside the accepted range, SPP Staff will reevaluate the project and submit updated analysis to BOD for review
Study Estimate Design Guide (SEDG)
Establish Study Estimate Design Guide to be used by the SPP’s Transmission Owners (TOs) in developing Study Estimates for SPP footprint projects rated at voltages at 100 kV and greater.
These SEDGs are intended to ensure consistency in TO Study Estimates.
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Minimum Conductor Sizing for normal ratings is specified, e.g., 1,200 Amps for 230 kV and 3,000 Amps for 345 kV
Reconductoring should consider advanced conductors if possible
Reactive Compensation costs should be included in project costs estimates
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Substations should be designed with :
Accommodations for future expansion
Suggested bus configurations by voltage class and number of terminals
Minimum terminal equipment ratings
Minimum bus ratings
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Protection and control designs should include:
Redundancy
PMUs or Intelligent Electronic Devices (EIDs) for 230 kV and above
SCADA and RTUs
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Example: Year 1: $100,000
Year 2: $200,000
Year 3: $100,000
Total $400,000
Using a escalation rate of 2%/yr
Year 1: $100,000 = $100,000
Year 2: $200,000 @ 2% = $204,000
Year 3: $100,000 @ 2% = $104,040
Total: = $408,040