Rutland / Cold River Area Study R l d / C ld Ri A S d Summary - - PowerPoint PPT Presentation

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Rutland / Cold River Area Study R l d / C ld Ri A S d Summary Rev 5 November 2012 Orientation Th The area of concern includes the Blissville, Rutland, and Cold River f i l d h Bli ill R l d d C ld Ri areas as well as the

SLIDE 1

R l d / C ld Ri A S d Rutland / Cold River Area Study Summary

Rev 5 ‐ November 2012

SLIDE 2

Orientation

Th f i l d h Bli ill R l d d C ld Ri The area of concern includes the Blissville, Rutland, and Cold River areas as well as the subtransmission corridor that extends out to Cavendish.

Area of concern

SLIDE 3

Problems

The area’s problems are complex, multi‐dimensional, and interdependent They include:

interdependent. They include:
A deficiency in the number and total thermal capability of area

115/46 kV transformer interconnections.

The anticipated integration of the recently acquired, relatively

weak, and radially‐fed VMPD system.

An aged combustion turbine intended for peak load support that is

no longer reliable.

A rather large matrix of area subtransmission lines many of which
A rather large matrix of area subtransmission lines, many of which

are thermally inadequate.

SLIDE 4

Solution Alternatives

Possible solutions appear to be (in order of ascending cost):

New 115/46 kV West Rutland interconnection utilizing the existing open 115 kV
New 115/46 kV West Rutland interconnection utilizing the existing open 115 kV

bay at VELCO’s West Rutland substation. Rough estimated capital cost: $20M

NTA/TA hybrid that includes 30 Mw of new CTs at Lalor Avenue in Rutland and

significant area reconductoring. Rough estimated capital cost: $31M (excludes generation redundancy requirements, and also excludes estimated $6M in present value for FCM revenue benefit)

New 115/46 kV West Rutland interconnection requiring a new 115 kV bay at

VELCO’s West Rutland substation. Rough estimated capital cost: $35M

New 115/46 kV South Rutland interconnection substation. Rough estimated

capital cost: $42M

2nd North Rutland autotransformer with substation expansion. Rough estimated

2 North Rutland autotransformer with substation expansion. Rough estimated capital cost: $47M

SLIDE 5

Next Steps… Next Steps…

1. Determine availability of open 115 kV bay at West Rutland substation. 2 Fi li t l i f ll ibl l ti lt ti 2. Finalize cost analysis of all possible solution alternatives. 3. Update analysis to reflect “Solar Capital” resources, Standard Offer program resources, other policy initiatives, d t ti l k t b d f and potential market‐based revenue from new generation. 4. Reevaluate need based on most recent load forecast. 5. Choose and implement solution alternative.