rprs settlement examples
DESCRIPTION
RPRS Settlement Examples. March 14, 2006. Presented by ERCOT Art Deller Bill Kettlewell. Market Support Services March 30, 2005. The Players. INTRODUCING. ELECTRONS R US. A Load-Scheduling QSE Scheduler for EZWATTS Retail Electric Provider. Wholesale Power Trader. The Players. - PowerPoint PPT PresentationTRANSCRIPT
RPRS Settlement Examples
Market Support ServicesMarch 30, 2005
March 14, 2006
Presented by ERCOT Art Deller Bill Kettlewell
2
A Load-Scheduling QSEA Load-Scheduling QSE
Scheduler for Scheduler for EZWATTSEZWATTS Retail Electric Provider. Retail Electric Provider.
Wholesale Power TraderWholesale Power Trader
INTRODUCING
The Players
3
AND ALSO STARRING
A Generation and Power Marketing QSEA Generation and Power Marketing QSE
Markets and Schedules Markets and Schedules WATTSupWATTSup power generation company. power generation company.
Qualified to provide Ancillary Services.Qualified to provide Ancillary Services.
Provide Power Marketing Services. Provide Power Marketing Services.
The Players
4South
West North
The SettingThree Congestion Zone model:
5
Shift Factors
CM Zone names
Average Weighted Shift Factor
West to North
Average Weighted Shift Factor
South to North
Average Weighted Shift Factor
South to West
West2003 0.489911548 -0.004425342 -0.016725781North2003 -0.008056712 -0.120276952 -0.003225342South2003 0.002302236 0.503257831 0.104328870
CSC Zonal Average Weighted Shift Factors
The Setting
6
Act 1Capacity Insufficiency
7
The Story
Electrons R Us submits the following schedule in the Day Ahead Period to cover their load in the South Zone:
Electrons R Us has a Load Ratio Share of 1%.
BILATERAL AGREEMENTS BALANCED SCHEDULEMarket Service
Date: 27-Jun-06 Hour: 1500 Type: ENE QSE: Electrons R UsMarket Interval
Resource MW
Provider Type Provider CM Zone
Obligation MW
Receipient Type Recipient CM Zone
1415 90 QSE PowerHouse SOUTH2006 90 QSE Electrons R Us SOUTH2006
1430 95 QSE PowerHouse SOUTH2006 95 QSE Electrons R Us SOUTH2006
1445 100 QSE PowerHouse SOUTH2006 100 QSE Electrons R Us SOUTH2006
1500 105 QSE PowerHouse SOUTH2006 105 QSE Electrons R Us SOUTH2006
8
The Story
PowerHouse has a generator, Gator Gulch, in the North Zone that is scheduled to be off-line but available on June 27, 2006 with the following Replacement Bid Prices: Startup Price = $120 / MW
Hourly Run Price = $25 / MW
ERCOT procures Gator Gulch as Replacement Reserve during the Day-Ahead Period for Capacity Insufficiency.
There is no Zonal or Local Congestion.
9
RPRS Settlement Process:
Pay Providers: Capacity Insufficiency Zonal Congestion Local Congestion
The Story
Collect from Users: Under Scheduled QSEs Zonal Congestion Uplift to Market
10
Pay Providers:Capacity InsufficiencyZonal CongestionLocal Congestion
The Story
11
Zonal Replacement Reserve (LCFLAG = 0)
Steps:
1. ZRPQ – Awarded amount2. ZRPHR – Number of hours awarded3. Apply Bids to calculate ZPCRPAMT
Pay Providers of Capacity
12
ZRPQ – Zonal Replacement Quantity
Hour 15 (Intervals 57 – 60):
ZRPQ = MIN[156,( 143 + 144 + 146 + 147 )/ 4] = 145
RPRSMW = 156
Hours Hr10 Hr11 Hr12 Hr13 Hr14 Hr15 Hr16 Hr17 Hr18 Hr19 Hr20 Hr21
LCFLAG ........ 2 2 1 1 1 0 0 0 0 2 2 2 .......
Interval Int57 Int58 Int59 Int60 Int61 Int62 Int63 Int64 Int65 Int66 Int67 Int68
HSL ........ 143 144 146 147 157 161 156 154 158 155 157 154 .......
Hours
ZRPQ ........ 0 0 0 0 0 145 156 156 156 0 0 0 .......
Hr10 Hr11 Hr12 Hr13 Hr14 Hr15 Hr16 Hr17 Hr18 Hr19 Hr20 Hr21
Pay Providers of Capacity
13
ZRPHR – number of hours instructed
ZRPHR = 4
Hours Hr10 Hr11 Hr12 Hr13 Hr14 Hr15 Hr16 Hr17 Hr18 Hr19 Hr20
ZRPQ ........ 0 0 0 0 0 145 156 156 156 0 .......
ZRPHR ........ 0 0 0 0 0 4 4 4 4 0 .......
Pay Providers of Capacity
14
ZPCRPAMT – Zonal Procured Capacity Replacement Amount
ZRPQ*MCPCRP
ZRPHRBP,ZRPHR
ZRPSUBP
max1*ZPCRPAMT
Pay Providers of Capacity
15
ZPCRPAMT – Zonal Procured Capacity Replacement Amount
146MW*$55/MW
$25/MW,4
$120/MW
max1*ZPCRPAMT
Pay Providers of Capacity
ZPCRPAMT = -$8030
16
The Story
Collect from Users:Under Scheduled QSEsZonal CongestionUplift to Market
17
Steps:
Use maximum MCPC for any RPRS Market for the Operating day
Find the Maximum difference between the QSEs Adjusted Metered Load and Scheduled Load for any period in which there was an RPRS Market
Add the amount of the Maximum Mis-Matched quantity for any Interval with an RPRS Market
RPRS Under Scheduled Charge
18
RPRS Under Scheduled Charge
0,MaxM(AMLi1zq-CLi1zq)
USRPizq= MaxM(MCPCRPizq) * Max MaxM(AMLi2zq-CLi2zq) +MMQizq
MaxM(AMLi3zq-CLi3zq)
MaxM(AMLi4zq-CLi4zq)
Variables
US = RPRS Under Scheduled ChargeAML = Adjusted Meter LoadCL = Current Scheduled LoadMCPC = Market Clearing Price for CapacityMMQ = Mismatched Amount
Subscripts
M = Marketi = Intervalz = Congestion Management Zoneq = QSERP = Replacement Reserve
19
Adjusted Metered Load vs. Scheduled Load at time of
RPRS Procurement 70
75
80
85
90
95
100
105
110
115
1 2 3 4
Sche
dule
d
Met
ered
Sche
dule
d
Met
ered
Sche
dule
d
Met
ered
Sche
dule
d
Met
ered
Hour Ending 1500
Max Difference = 10MW
RPRS Under Scheduled Charge
20
For Hour Ending 1500:
Maximum MCPC = $55
Maximum Under Scheduled amount = 10MW
Maximum Mismatch amount = 0MW
RPRS Under Scheduled Charge
21
For Hour Ending 1500, Electrons R Us pays
USRPAMT = $55 * (10MW) = $550
Other QSE’s besides Electrons R US also pay USRPAMT, such that the total collected is
USRPBILLAMTTOT = $55 * (100MW) = $5500
RPRS Under Scheduled Charge
22
The Story
Collect from Users:Under Scheduled QSEsZonal CongestionUplift to Market
23
Steps: Calculate total costs of Procured RPRS Capacity.
Calculate total RPRS Underscheduled Charge.
Calculate total Replacement Capacity payments to TCR holders.
Calculate total CSC impact Replacement Capacity charge.
Sum all of the above and multiply by Load Ratio Share.
RPRS Uplift Charge
24
UCRP = -1 * [ Σ ( PCRP + LPCRP ) + Σ USRP + TCRPAYRP + Σ CSCRP ]* LRS
RPRS Uplift Charge
Variables
UC = RPRS Uplift ChargePC = Cost of Capacity for Zonal
Congestion and Capacity Insufficiency
LPC = Cost of RPRS for Local Congestion
US = RPRS Under Scheduled ChargeTRCRPAY = TCR Payment per HourCSC = RPRS CSC Impact Capacity
ChargeLRS = Load Ratio Share
Subscripts
RP = Replacement Reserve
25
For Hour Ending 1500, Electrons R Us pays
UCRP = -1 * [ Σ PCRP + Σ USRP]* LRS
UCRPAMT = -1*(ZPCRPBILLAMTTOT + USRPBILLAMTTOT) * LRS= -1*(-$8030 + $5500) * 0.01= $25.30
RPRS Uplift Charge
26
Act 2Zonal Congestion
27
The Story
Electrons R Us submits the following schedule in the Day Ahead Period to cover their load in the North Zone:
Electrons R Us has a Load Ratio Share of 1%.
BILATERAL AGREEMENTS BALANCED SCHEDULEMarket Service
Date: 27-Jun-06 Hour: 1500 Type: ENE QSE: Electrons R UsMarket Interval
Resource MW
Provider Type Provider CM Zone
Obligation MW
Receipient Type Recipient CM Zone
1415 90 QSE PowerHouse SOUTH2006 90 QSE Electrons R Us NORTH2006
1430 95 QSE PowerHouse SOUTH2006 95 QSE Electrons R Us NORTH2006
1445 100 QSE PowerHouse SOUTH2006 100 QSE Electrons R Us NORTH2006
1500 105 QSE PowerHouse SOUTH2006 105 QSE Electrons R Us NORTH2006
28
The Story
PowerHouse has a generator, Gator Gulch, in the North Zone that is scheduled to be off-line but available on June 27, 2006 with the following Replacement Bid Prices: Startup Price = $120 / MW
Hourly Run Price = $25 / MW
ERCOT procures Gator Gulch as Replacement Reserve during the Day-Ahead Period for Zonal Congestion.
The South to North CSC is constrained.
29
RPRS Settlement Process:
Pay Providers: Capacity Insufficiency Zonal Congestion Local Congestion
The Story
Collect from Users: Under Scheduled QSEs Zonal Congestion Uplift to Market
30
Pay Providers:Capacity InsufficiencyZonal CongestionLocal Congestion
The Story
31
Zonal Replacement Reserve (LCFLAG = 0)
Steps: (Same as with Capacity Insufficiency)
1. ZRPQ – Awarded amount2. ZRPHR – Number of hours awarded3. Apply Bids to calculate ZPCRPAMT
Pay Providers of Capacity
32
ZPCRPAMT – Zonal Procured Capacity Replacement Amount
146MW*$55/MW
$25/MW,4
$120/MW
max1*ZPCRPAMT
Pay Providers of Capacity
ZPCRPAMT = -$8030
33
The Story
Collect from Users:Under Scheduled QSEsZonal CongestionUplift to Market
34
Just as before, in Hour Ending 1500, Electrons R Us pays
USRPAMT = $55 * (10MW) = $550
Other QSE’s besides Electrons R US also pay USRPAMT, such that the total collected is
USRPBILLAMTTOT = $55 * (100MW) = $5500
RPRS Under Scheduled Charge
35
The Story
Collect from Users:Under Scheduled QSEsZonal CongestionUplift to Market
36South
West North
Res1 = 90MWRes2 = 95MWRes3 = 100MWRes4 = 105MW
RPRS Zonal Congestion ChargeExample:
Load1 = 90MWLoad2 = 95MWLoad3 = 100MWLoad4 = 105MW
37
RPRS Zonal Congestion Charge
CSCRPhq = SPCCSCh* MAX (0, ICSChq))
ICSChq = MAX [0,MAX [Σ ((QSSTOPiqz – QOSTOPiqz) * SFzcsc)z ]n]
Variables
CSC = Commercially Significant ConstraintI =Scheduled MW ImpactQSS = QSE Supply ScheduleQOS = QSE Obligation ScheduleSF = Shift FactorSPC = Shadow Price for Capacity
Subscripts
i = Intervalh = Hour being calculatedn = Number of time RPRS is procuredTOP = Time of Replacementq = QSEz = Congestion Management Zone
38
For each interval in Hour Ending 1500, Calculate the impact on the the South to North constraint as follows:
ImpactSouth = (Resource – Obligation) * SFSN
ImpactNorth = (Resource – Obligation) * SFSN
ImpactSN = ImpactSouth + ImpactNorth
The hourly impact is the maximum interval impact during the hour.
RPRS Zonal Congestion Charge
Calculate the Schedule Impact
39
RPRS Zonal Congestion Charge
Calculate the Schedule Impact
The hourly impact is the maximum interval impact during the hour;
ICSC = 65.47 MW
Market Interval CM Zone
Resource MW
Obligation MW
Shift Factor SN CM Zone
Resource MW
Obligation MW
Shift Factor SN Impact
1415 SOUTH 90 0 0.5032578 NORTH 0 90 -0.120277 56.11813
1430 SOUTH 95 0 0.5032578 NORTH 0 95 -0.120277 59.2358
1445 SOUTH 100 0 0.5032578 NORTH 0 100 -0.120277 62.353481500 SOUTH 105 0 0.5032578 NORTH 0 105 -0.120277 65.47115
40
CSCRPAMT = (Impact) * Shadow Price for Capacity= ICSC * MCPCSPC= (65.47MW)($100/MW)= $6547.00
RPRS Zonal Congestion Charge
Calculate the Congestion Charge
41
The Story
Collect from Users:Under Scheduled QSEsZonal CongestionUplift to Market
42
UCRP = -1 * [ Σ ( PCRP + LPCRP ) + Σ USRP + TCRPAYRP + Σ CSCRP ]* LRS
RPRS Uplift Charge
Variables
UC = RPRS Uplift ChargePC = Cost of Capacity for Zonal
Congestion and Capacity Insufficiency
LPC = Cost of RPRS for Local Congestion
US = RPRS Under Scheduled ChargeTRCRPAY = TCR Payment per HourCSC = RPRS CSC Impact Capacity
ChargeLRS = Load Ratio Share
Subscripts
RP = Replacement Reserve
43
For Hour Ending 1500, Electrons R Us pays
UCRP = -1 * [ Σ PCRP + Σ USRP + TCRPAYRP + Σ CSCRP ]* LRS
UCRPAMT = -1*[ ZPCRPBILLAMTTOT + USRPBILLAMTTOT+ (TCROWNEDERCOT * MCPCSPC) + CSCRPQSEBILLAMTTOT] * LRS= -1*[-$8030 + $5500 - (500MW * $100/MW)+ $51,000 ] * 0.01= $15.30
RPRS Uplift Charge
44
Act 3Local Congestion
45
The Story
PowerHouse has a generator, Swamp Thing Unit 1, in the South Zone that is scheduled to be off-line but available on June 27, 2006 with the following Replacement Bid Prices: Startup Price = $120 / MW
Hourly Run Price = $25 / MW
ERCOT procures Swamp Thing Unit 1 as Replacement Reserve during the Adjustment Period for Local Congestion.
There is no Zonal Congestion.
46
The Story
Data for Swamp Thing Unit 1
Gas-Steam Reheat Boiler
RCGSC = $3000 + (FIP * 16.5 MMBtu/MW * RMC)
RCGMEC = 17.0 MMBtu/MW * FIP
Power House brings the unit on and operates at 100 MW during the instructed hours
Note: RMC (Resource Maximum Capacity) is the average HSL during the first hour of the instructed period.
47
RPRS Settlement Process:
Pay Providers: Capacity Insufficiency Zonal Congestion Local Congestion
The Story
Collect from Users: Under Scheduled QSEs Zonal Congestion Uplift to Market
48
Pay Providers:Capacity InsufficiencyZonal CongestionLocal Congestion
The Story
49
Pay Providers of Capacity
Local Replacement Reserve (LCFLAG = 1)
Steps
1. LRPQ – Awarded amount2. LRPHR – Number of hours awarded3. LPS – Start up payment4. LPO – Operation payment
50
LRPQ – Local Replacement Quantity
Hour 15 (Intervals 57 – 60):
LRPQ =( 124 + 125 + 127 + 128 )/ 4] = 126
Hours Hr10 Hr11 Hr12 Hr13 Hr14 Hr15 Hr16 Hr17 Hr18 Hr19 Hr20 Hr21
LCFLAG ........ 2 2 2 2 2 1 1 1 1 2 2 2 .......
Interval Int57 Int58 Int59 Int60 Int61 Int62 Int63 Int64 Int65 Int66 Int67 Int68
LSL ........ 75 76 78 79 79 79 79 79 79 78 78 77 .......
Hours
LRPQ ........ 0 0 0 0 0 126 128 127 127 0 0 0 .......
Hr10 Hr11 Hr12 Hr13 Hr14 Hr15 Hr16 Hr17 Hr18 Hr19 Hr20 Hr21
Pay Providers of Capacity
HSL ........ 124 125 127 128 128 128 128 128 128 127 127 126 .......
51
LRPHR – number of hours instructed
LRPHR = 4
Hours Hr10 Hr11 Hr12 Hr13 Hr14 Hr15 Hr16 Hr17 Hr18 Hr19 Hr20
LRPQ ........ 0 0 0 0 0 126 128 128 127 0 .......
LRPHR ........ 0 0 0 0 0 4 4 4 4 0 .......
Pay Providers of Capacity
52
Pay Providers of Capacity
Calculate LPS – Local RPRS start up payment
LPS = RCGSC / LRPHR
= [$3000 + (FIP * 16.5 MMBtu/MW * RMC)] / LRPHR
= [$3000 + (FIP * 16.5 MMBtu/MW * LRPQ(1st HR)] / LRPHR
= [$3000 + ($8.00/MMBtu * 16.5 MMBtu/MW * 126 MW)] / 4 HR
= $4908 / HR
Section 6.8.1.11
53
Pay Providers of Capacity
RCGMEC = 17.0 MMBtu/MWh * $8.00/MMBtu = $136 / MWh
LPO = [ ($136 - $60 / MWh) * 75 MW * ¼ hr) + ($136 - $61 / MWh) * 76 MW * ¼ hr) + ($136 - $62 / MWh) * 78 MW * ¼ hr) + ($136 - $63 / MWh) * 79 MW * ¼ hr) ]
= $5734.75 for Hour Ending 1500
4
1i GSITETOT
LSL/4min*MCPERRCGMECLPO
Section 6.8.1.11
Calculate LPO – Local RPRS Operating payment
54
Pay Providers of Capacity
LPCRPAMT – Local Procured Capacity Replacement Amount
For Hour Ending 1500,
LPCRPAMT = -1* [Max(0, LPS + LPO) + LPRPADJ]
= -1* [($ 4908.00 + $5734.75)] + 0
= -$10,642.75
Section 6.8.1.11
55
The Story
Collect from Users:Under Scheduled QSEsZonal CongestionUplift to Market
56
UCRP = -1 * [ Σ ( PCRP + LPCRP ) + Σ USRP + TCRPAYRP + Σ CSCRP ]* LRS
RPRS Uplift Charge
Variables
UC = RPRS Uplift ChargePC = Cost of Capacity for Zonal
Congestion and Capacity Insufficiency
LPC = Cost of RPRS for Local Congestion
US = RPRS Under Scheduled ChargeTRCRPAY = TCR Payment per HourCSC = RPRS CSC Impact Capacity
ChargeLRS = Load Ratio Share
Subscripts
RP = Replacement Reserve
57
For Hour Ending 1500, Electrons R Us pays
UCRP = -1 * [ LPCRP ]* LRS
UCRPAMT = -1* [ LPCRPBILLAMTTOT ] * LRS
= -1* [ -$ 10,642.75 ] * 0.01
= $106.43
RPRS Uplift Charge
58
Questions