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
Reliability Redispatch Pilot Presentation for NIPPC
June 13, 2007
Term of Pilot 6/26/07 through 9/30/07
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
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)
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
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
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
Submitting a Bid
• Submitted or changed up to20 minutes prior to flow hour.
• No further into the futurethan 5 days. (Day +5)
Bid Tool Demonstration
Calculate Redispatch
Background
Simplified RRP Map
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).
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.
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
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
+ -
Single Redispatch Pair
Redispatch: 35 MW
JDA-CNT
Impact: 35*-0.508=-17.8 MW
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.
Calculate Redispatch
35-MW Paul-Allston Example
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… … … … … … … … … …
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
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
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
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
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
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
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
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