Transcript Transmission Options for Mariah Wind Farm

Transmission Options for
Mariah Project, Phase II
3/10/2010
Proposed Agenda
• A Quick Mariah Project Update
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Land lease status
ERCOT application
SPP application
Tres Amigas
• Present Mariah Interconnection Solutions
• Discuss Potential Mariah/AEP Cooperation:
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Interconnection of Sherman/Dallam to Hitchland, Tres Amigas, HPX
Timing
Possibilities for signing letter of intent
Interconnection business model alternatives
Tres Amigas/Hitchland interconnection, possibilities for Mariah
interconnection
• Tallgrass Line And Other Bottlenecks – How can Mariah project
contribute to optimum grid solutions
• Other items
Assumptions
Notes
1) Phase I and II installed capacity and actual capacity
1)
Phase I
1)
2)
2)
Parmer
Sherman
1250 MW
1000 MW
Phase II
1)
2)
Parmer
Sherman
1750 MW – total 3000 MW
1000 MW – total 2000 MW
Actual capacity
- 10% Operating reserve (other ancillaries services)
-10 % Losses
= 80 % installed capacity for sale into the different markets
2) The sales are assumed to be under long-term contracts for energy deliveries that count as renewable
energy and therefore will be at prices that include a renewable premium.
3) Any surplus energy produced over the long-term sales will be sold in the local imbalance market, that
is SPP, ERCOT or New Mexico (WECC).
4) Transmission lines between Mariah and TASS/ERCOT/SPP are shown in orange and red. Without a
full study and optimization of capacity required, required TASS capacity is estimated at:
Phase 2: ERCOT–WECC
1500-2000 MW
SPP–WECC
750-1000 MW
ERCOT–SPP
500-750 MW
5) Optionally, if capacity is available at low prices, 500 MW each for WECC–SPP; SPP–ERCOT; WECC–
ERCOT. This will provide operational flexibility.
6) It is assumed that other transmission (shown in green dashed lines) will be built by third parties to
access TASS.
Mariah interconnection
solutions
SPPHitchland
Dallam
TresAmigas
SuperStation
Parmer
Sherma
n
Phase I
1250 MW
ERCOT-Nazareth
Phase II
3000 MW
SPP-Toke?
Owned by Mariah, built by AEP?
Alt. routing, owned by Mariah, built by AEP?
Public interconnection between TASS-SPP and TASS-ERCOT?
Owned by Mariah, built by Sharyland?
Phase II – 2015/2016
CA
PJM
MISO
AZ
Phase 1+2;
2000 MW Sherman – Tallgrass
SPP
NM
750 - 1000 MW
In Phase 2, MWF-S (Sherman) is interconnected to SPP through a 2000 MW
line. Assume that sales to the East and West are:
1) 300 MW in PJM requiring 300 MW of transmission between MISO & PJM
2) 300 MW in MISO requiring 600 MW of transmission between SPP & MISO
3) 400 MW in SPP
4) Remaining 500 MW exported to WECC
MWF-P (Parmer) is interconnected to TASS by a 1250 MW line and to ERCOT
via 3000 MW of CREZ transmission.
Assume that sales to the West and East are:
1) 500 MW in CA requiring 500 MW of transmission between AZ and CA
2) 500 MW in AZ requiring 1000 MW of transmission between NM and AZ
3) 700 MW in NM requiring 1700 MW of transmission between TASS and NM
4) Remaining 700 MW exported to SPP
G1
TASS
MWFS
G2
G3
1250 MW
ERCOT
Phase 1+2;
3000 MW Parmer – TASS
Up to 1250 MW Parmer - ERCOT
MWFP
G6
G4
G5