Reliability Redispatch Pilot Presentation for NIPPC June 13, 2007 Term of Pilot 6/26/07 through...

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