reliability redispatch pilot presentation for nippc june 13, 2007 term of pilot 6/26/07 through...
DESCRIPTION
Bid Tool Overview Redispatch Bid Content Generator Day and Hour ending Quantity (MW) available within 10 min. Price per MWh Increase (INC) and/or Decrease (DEC)TRANSCRIPT
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Reliability Redispatch Pilot Presentation for NIPPC
June 13, 2007
Term of Pilot 6/26/07 through 9/30/07
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Project Status Software Development complete Hardware environments configured and
operational Dispatch and scheduling procedure
changes documented Dispatch, scheduling and bidder training
underway Pilot agreement nearing completion
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Bid Tool Overview Redispatch Bid Content
• Generator• Day and Hour ending• Quantity (MW) available within 10 min.• Price per MWh• Increase (INC) and/or Decrease (DEC)
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Bid Validation Rules
• INC Only Bid
• DEC Only Bid
• INC and DEC Bid
• Neither – Zero Bid
• INC Bid includes INC MW & INC Price
• DEC Bid includes DEC MW & DEC Price
Bid Data
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Bid Validation Rules
• Whole # > Zero
• Not exceeding Generator’s established Maximum INC/DEC MW amount.
• Not less than Generator’s established Minimum INC/DEC MW amount.
Megawatts
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Bid Validation Rules
• Positive U.S. currency value per MWh
• Not exceeding established Maximum INC/DEC Bid Price Limit. ($400)
• Not less than established Minimum INC/DEC Bid Price Limit. ($0)
Price
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Submitting a Bid
• Submitted or changed up to20 minutes prior to flow hour.
• No further into the futurethan 5 days. (Day +5)
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Bid Tool Demonstration
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Calculate Redispatch
Background
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Simplified RRP Map
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Introduction
• A generator’s impact on a flowgate is measured by its Power Transfer Distribution Factor or PTDF.
• PTDF is also known as Path Utilization Factor (PUF) and Transmission Loading Relief (TLR).
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Introduction cont.
• The PTDF is the ratio impact to the loading on a specific flowgate based on an increase (INC) at the generator and a like decrease (DEC) at a reference bus (Grand Coulee for our studies).
• A positive PTDF will increase the loading.
• A negative PTDF will decrease the loading and provide relief.
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Reference BusPUFs are zero
Generators
South of
Allston
North of
Hanford
North of
John Day
Paul-Allsto
n
CAR Carmen -0.173 -0.563 -0.819 -0.204
CHJ Chief Joseph 0.010 -0.005 -0.007 0.012
CHP Chehalis 0.249 -0.250 -0.748 0.389
CNT Centralia 0.231 -0.232 -0.749 0.352
GCL Grand Coulee 0.000 0.000 0.000 0.000
HPP Hermiston -0.091 -0.547 -0.714 -0.125
JDA John Day -0.127 -0.611 -0.834 -0.156
LAN Lancaster -0.018 -0.186 -0.006 -0.024
TDA The Dalles -0.135 -0.580 -0.808 -0.169
zBON Bonneville -0.136 -0.454 -0.734 -0.254
zFRD Fredrickson 0.084 -0.074 -0.147 0.087
zGEC Goldendale -0.125 -0.572 -0.786 -0.159
zHMJ HM Jackson 0.044 -0.028 -0.022 0.052
zKBC Kimberly Clark 0.044 -0.028 -0.022 0.052
zKFG Klamath Falls Gen -0.147 -0.589 -0.828 -0.176
zLVF Longview Fiber 0.072 -0.059 -0.091 0.070
zMCN McNary -0.091 -0.547 -0.714 -0.125
Flowgates
Flowgates and PTDFs/PUFs
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Redispatch• To relieve the loading on the path, we find the pairs of
generators that will provide relief.• We look for combinations of INC generator and DEC
generators with a combined PTDF that is negative.• The combined PTDF is the INC PTDF – DEC PTDF.• Numbers closer to -1.0 are more effective.
DEC CNT CHP CHJ GCL
INC P-A 0.352 0.389 0.012 0.000
CAR -0.204 -0.556 -0.593 -0.216 -0.204
GCL 0.000 -0.352 -0.389 -0.012 0.000
JDA -0.156 -0.508 -0.545 -0.168 -0.156
TDA -0.169 -0.521 -0.558 -0.181 -0.169
+ -
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Single Redispatch Pair
Redispatch: 35 MW
JDA-CNT
Impact: 35*-0.508=-17.8 MW
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Redispatch Solution
• To get more relief, redispatch more pairs of generators.
• Since a single generator could be involved in multiple pairs, the amounts are summed and each generator is called once.
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Calculate Redispatch
35-MW Paul-Allston Example
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35-MW Paul-Allston Example
Required Relief = 35Bids
Generator INC $ DEC $INC MW
DEC MW
Used INC MW
Used DEC MW
AvailableINC MW
AvailableDEC MW Redispatch Contact
CAR $80.00 $20.00 40 40 0 0 40 40 EWEB DispatcherCHJ $80.00 $20.00 100 100 0 0 100 100 BPAP Hydro DeskCHP $80.00 $20.00 30 30 0 0 30 30 CHP Plant OperatorCNT $80.00 $20.00 75 75 0 0 75 75 CNT Plant OperatorGCL $80.00 $20.00 200 200 0 0 200 200 BPAP Hydro DeskHPP $80.00 $20.00 25 25 0 0 25 25 HPP Plant OperatorJDA $80.00 $20.00 45 45 0 0 45 45 BPAP Hydro DeskLAN $80.00 $20.00 75 75 0 0 75 75 Avista Energy DispTDA $80.00 $20.00 30 30 0 0 30 30 BPAP Hydro Desk… … … … … … … … … …
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35-MW Paul-Allston Example1. Add the first bid pair to the Suggestion List and update the Cumulative Relief, Cumulative Price and # of Calls
Bid Stack
INC DEC INCPTDF
DECPTDF
PAIRPTDF INC $ DEC $ PAIR $ EFF $ INC MW DEC MW PAIR MW Potential
ReliefCAR CHP -0.2043 0.3885 -0.5928 $80.00 $20.00 $60.00 $101.21 40 30 30 17.7TDA CHP -0.1719 0.3885 -0.5604 $80.00 $20.00 $60.00 $107.06 30 30 30 16.8CAR CNT -0.2043 0.3514 -0.5557 $80.00 $20.00 $60.00 $107.97 40 75 40 22.2… … … … … … … … … … … … …
Suggestion List
Redispatch Contact GeneratorINCMW
DECMW This bid Relief: 17.7 Cumulative Relief: 17.7
EWEB Dispatcher DispatcherCAR 30 This bid Price: $1,800 ($60 x 30 MW) Cumulative Price: $1,800CHP Plant Operator CHP 30 Number of Calls: 2
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35-MW Paul-Allston Example2. Update both bids of the pair to reflect the MW used
Bids
Generator INC $ DEC $INC MW
DEC MW
Used INC MW
Used DEC MW
AvailableINC MW
AvailableDEC MW Redispatch Contact
CAR $80.00 $20.00 40 40 30 0 10 40 EWEB DispatcherCHP $80.00 $20.00 30 30 0 30 30 0 CHP Plant Operator
3. Re-calculate the Bid Stack
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35-MW Paul-Allston Example4. Add the next bid pair to the Suggestion List and update the Cumulative Relief, Cumulative Price and # of Calls
Bid Stack
INC DECINC
PTDFDEC
PTDFPAIR
PTDF INC $ DEC $ PAIR $ EFF $ INC MW DEC MW PAIR MWPotential
ReliefCAR CNT -0.2043 0.3514 -0.5557 $80.00 $20.00 $60.00 $107.97 10 75 10 5.5TDA CNT -0.1719 0.3514 -0.5233 $80.00 $20.00 $60.00 $114.65 30 75 30 15.6… … … … … … … … … … … … …
Suggestion List
Redispatch Contact GeneratorINCMW
DECMW This bid Relief: 5.5 Cumulative Relief: 23.2
EWEB Dispatcher CAR 30 This bid Price: $600 ($60 x 10 MW) Cumulative Price: $2,40010 Number of Calls: 3
CHP Plant Operator CHP 30CNT Plant Operator CNT 10
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35-MW Paul-Allston Example5. Update both bids of the pair to reflect the MW used
Bids
Generator INC $ DEC $ INC MW
DEC MW
Used INC MW
Used DEC MW
AvailableINC MW
AvailableDEC MW Redispatch Contact
CAR $80.00 $20.00 40 40 40 0 0 40 EWEB DispatcherCHP $80.00 $20.00 30 30 0 30 30 0 CHP Plant OperatorCNT $80.00 $20.00 75 75 0 10 75 65 CNT Plant Operator
6. Re-calculate the Bid Stack
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35-MW Paul-Allston Example7. The next bid pair provides more relief than needed to meet the Required ReliefRequired Relief = 35 Cumulative Relief (23.2) + this bid Relief (15.6) = 38.8 3.8 MW too much relief
Bid Stack
INC DECINC
PTDFDEC
PTDFPAIRPTDF INC $ DEC $ PAIR $ EFF $ INC MW DEC MW PAIR MW
PotentialRelief
TDA CNT -0.1719 0.3514 -0.5233 $80.00 $20.00 $60.00 $114.65 30 65 30 15.6JDA CNT -0.1567 0.3514 -0.5081 $80.00 $20.00 $60.00 $118.08 45 65 45 22.8… … … … … … … … … … … … …
8. Calculate the MW to use from the last bid so that the exact Required Relief is metRelief Needed = Required Relief - Cumulative Relief
Required Relief (35) - Cumulative Relief (23.2) = 11.6 Relief Needed11.8
9. Calculate MW to Use from this bidMW to Use = Relief Needed / (Pair PTDF x -1), rounded up
Relief Needed (11.8) / (Pair PTDF(-.05233 x -1) = 22.549, rounded up to 23
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35-MW Paul-Allston Example10. Recalculate the Potential Relief for the final bid
Potential Relief = MW to Use x (Pair PTDF x -1), truncated to 1 decimal placeMW to Use (23) x Pair PTDF (-0.5233 x -1) = 12.0
Bid Stack
INC DECINC
PTDFDEC
PTDFPAIRPTDF INC $ DEC $ PAIR $ EFF $ INC MW DEC MW PAIR MW
PotentialRelief
TDA CNT -0.1719 0.3514 -0.5233 $80.00 $20.00 $60.00 $114.65 30 65 30 15.623 12.0
11. Recalculate the price for the adjusted bidBid Price = Pair Price x Potential Relief
Pair Price ($60) x Potential Relief (23) = $1,380
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35-MW Paul-Allston Example12. Add the last bid, with the adjusted Potential Relief, MW to Use, Pair Price to the Suggestion List and update the Cumulative Relief, Cumulative Price and # of Calls
Bid Stack
INC DECINC
PTDFDEC
PTDFPAIR
PTDF INC $ DEC $ PAIR $ EFF $ INC MW DEC MW PAIR MWPotential
ReliefTDA CNT -0.1719 0.3514 -0.5233 $80.00 $20.00 $60.00 $114.65 30 65 30 15.6
23 12.0JDA CNT -0.1567 0.3514 -0.5081 $80.00 $20.00 $60.00 $118.08 45 65 45 22.8… … … … … … … … … … … … …
Suggestion List
Redispatch Contact GeneratorINCMW
DECMW This bid Relief: 12.0 Cumulative Relief: 35.2
EWEB Dispatcher CAR 30 This bid Price: $1,380 ($60 x 23 MW) Cumulative Price: $3,78010 Number of Calls: 4
CHP Plant Operator CHP 30CNT Plant Operator CNT 10
23BPAP Hydro Desk TDA 23
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35-MW Paul-Allston Example13. Update both bids of the pair to reflect the MW used
Bids
Generator INC $ DEC $ INC MW
DEC MW
Used INC MW
Used DEC MW
AvailableINC MW
AvailableDEC MW Redispatch Contact
CNT $80.00 $20.00 75 75 0 33 75 42 CNT Plant OperatorTDA $80.00 $20.00 30 30 23 0 7 30 BPAP Hydro Desk
14. The final set of Bids that were used will look like this:
Bids
Generator INC $ DEC $ INC MW
DEC MW
Used INC MW
Used DEC MW
AvailableINC MW
AvailableDEC MW Redispatch Contact
CAR $80.00 $20.00 40 40 40 0 0 40 EWEB DispatcherCHP $80.00 $20.00 30 30 0 30 30 0 CHP Plant OperatorCNT $80.00 $20.00 75 75 0 33 75 42 CNT Plant OperatorTDA $80.00 $20.00 30 30 23 0 7 30 BPAP Hydro Desk
15. The final Call List will show the total that each generator needs to INC or DEC, like this:
Call List
Redispatch Contact Generator Request
EWEB Dispatcher CAR - Carmen Smith 40CHP Plant Operator CHP - Chehalis -30CNT Plant Operator CNT - Centralia -33BPAP Hydro Desk TDA - The Dalles 23