Post on 26-Mar-2015
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 1 Texas Nodal
RT Energy Settlements
Mini Market Examples
Formulas
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 2 Texas Nodal
RT Payment for DC Tie imports Flow Diagram
Settlement System
Le
ve
l 1C
alc
ula
tion
Inp
ut
MMS
Real-Time Energy Payment for DC Tie
Import(RTDCIMPAMT)PR 6.6.3.4 (1)
Real-Time Settlement Point
Price (RTSPP)
Driver
Le
ve
l 2
Real-Time Energy Payment for DC Tie Import QSE Total(RTDCIMPAMT-
QSETOT)PR 6.6.3.4 (2)
Real-Time DC Import
(RTDCIMP)
Le
ve
l 3
Real-Time Energy Payment for DC Tie
Import Total(RTDCIMPAMTTOT)
PR 6.6.10 (2)
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 3 Texas Nodal
RT Payment for DC Tie imports
• RTDCIMPAMT = (-1) * RTSPP * (RTDCIMP * ¼ )
• Paid on scheduled volume
• Used to pay QSEs who bring energy onto the grid
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 4 Texas Nodal
RT DC Tie Charge for Exports under Oklaunion Exemption Flow Diagram
Settlement System
Level 1
Calcu
lation
Inp
ut
MMS
Real-Time DC Export Amount
(RTDCEXPAMT)PR 6.6.3.6 (1)
Real-Time Settlement Point
Price (RTSPP)
Driver
Level 2
Real-Time DC Export Amount QSE Total(RTDCEXPAMT-
QSETOT)PR 6.6.3.6 (2)
Real-Time DC Export
(RTDCEXP)
Level 3
Real-Time DC Export Amount Total
(RTDCEXPAMTTOT)PR 6.6.3.10 (2)
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 5 Texas Nodal
RT DC Tie Charge for Exports under Oklaunion Exemption
• RTDCEXPAMT = RTSPP * (RTDCEXP * ¼)
• Only used to charge exports that are using the Oklaunion Exemption
• Amounts should not exceed generation that supplies the load for Oklaunion
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 6 Texas Nodal
RT Payment for Block Load Transfers Flow Diagram
Settlement System
Level 1C
alculation Input
MMS
Block Load Transfer Resource Amount
(BLTRAMT)PR 6.6.3.5 (1)
Real-Time Settlement Point
Price (RTSPP)
Driver
Level 2
Block Load Transfer Resource Amount QSE
Total(BLTRAMTQSETOT)
PR 6.6.3.5 (2)
Block Load Transfer Resource
(BLTR)
Level 3
Block Load Transfer Resource Amount
Total(BLTRAMTTOT)
PR 6.6.10 (2)
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 7 Texas Nodal
RT Payment for Block Load Transfers
• BLTRAMT = (-1) * RTSPP * BLTR
• Used to pay QSEs who have BLT agreements for moving load to the region that is not under emergency conditions
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 8 Texas Nodal
RT Congestion Payment / Charge for Self-Schedules Flow Diagram
Settlement System
Level 1
Calcu
lation
Inp
ut
MMS
Real-Time Congestion Cost Amount(RTCCAMT)PR 6.6.4 (1)
Real-Time Settlement Point Price at Source
(RTSPP)
Driver
Level 2
Real-Time Congestion Cost Amount QSE
Total(RTCCAMTQSETOT)
PR 6.6.4 (1)
Self-Schedule Quantity(SSQ)
Level 3
Real-Time Congestion Cost Amount Total(RTCCAMTTOT)
PR 6.6.10 (2)
Real-Time Settlement Point
Price at Sink(RTSPP)
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 9 Texas Nodal
RT Congestion Payment / Charge for Self-Schedules
• RTCCAMT = (RTSPPsink – RTSPPsource) * (SSQ * ¼)
• Used to pay /charge QSE for moving power from one point to another
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 10 Texas Nodal
RT Energy Imbalance Flow Diagram
Settlement System
Le
ve
l 1C
alc
ula
tion
Inp
ut
Data Aggregation
Real-Time Energy Imbalance Amount for
a Resource Node(RTEIAMT)
PR 6.6.3.1 (2)
Le
ve
l 2
Real-Time Metered Generation
(RTMG)
MMS
Real-Time Energy Imbalance Amount for
a Load Zone(RTEIAMT)
PR 6.6.3.2 (2)
Real-Time Energy Imbalance Amount for
a Hub(RTEIAMT)
PR 6.6.3.3 (2)
Data Aggregation
Real-Time Adjusted Metered Load
(RTAML)
Real-Time Energy Imbalance Amount QSE Total
(RTEIAMTQSETOT)PR 6.6.3.1 (3), PR 6.6.3.2 (3),
PR 6.6.3.3 (3)
Le
ve
l 3
Real-Time Energy Imbalance Amount Total
(RTEIAMTTOT)PR 6.6.10 (2)
Real-Time Settlement Point
Price (RTSPP)
Self Schedules with Sink at Settlement
Point(SSSK)
Self Schedules with Source at
Settlement Point(SSSR)
Day-Ahead Energy Purchases
(DAEP)
Day-Ahead Energy Sales
(DAES)
Real-Time Energy QSE to QSE Purchases(RTQQEP)
Real-Time Energy QSE to QSE Sales
(RTQQES)
Driver
Driver
Driver
Driver
Driver
Driver
DriverDriver
Driver: Operating Day
Driver: RTEIAMT
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 11 Texas Nodal
RT Energy Imbalance
• RTEIAMT = (-1) * ∑ (GSPLITPER * NMSAMTTOT) + RTSPP * [(SSSK * ¼) + (DAEP * ¼) + (RTQQEP * ¼) – (SSSR * ¼) – (DAES * ¼) – (RTQQES * ¼) – RTAML + RTMGNM
• Used only when point is a Resource Node• Used only when point is a Load Zone • Sigma is the sum of the Resources for the
GSPLITPER values• Used to pay / charge a QSE for imbalances at all
points of scheduled activity
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 12 Texas Nodal
Base Point Deviation Flow Diagram
Calculate BPDAMT for Over and Under Generation and for IRR Generation
Resouces(PR 6.6.5.1.1, PR 6.6.5.1.2, PR 6.6.5.2)
Le
vel 1
Le
vel 2
Le
vel 3
Le
vel 4
Ca
lcula
tion
In
pu
t
Calculate BPDAMTQSETOT(PR 6.6.5.4)
RTSPPAABP
Settlement System
RTM EMS(LFC)
Calculation Driver
TWTG K1 K2 KIRR Q1 LRS
Calculation Driver
RTM MMS(SPP Engine)
Constants and Coeffecients
Q2 QIRR KP
Calculate BPDAMTTOT(PR 6.6.5.4)
Calculate LABPDAMT(PR 6.6.5.4)
Data Aggregation
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 13 Texas Nodal
Base Point Deviation (Over Generation)
• BPDAMT = MAX (0, RTSPP) * MAX [0, (TWTG – ¼ * MAX(((1 + 5%) * AABP), (AABP + 5 MW)))]
• Used to charge a QSE for over-generating, the greater of 5% or 5 MW is allowed as a tolerance
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 14 Texas Nodal
Base Point Deviation (Under Generation)
• BPDAMT = MAX (0, RTSPP) * MIN (1, KP) * MAX {0,{MIN [((1 – 5%) * ¼ (AABP)), ¼ * (AABP – 5 MW)] – TWTG}}
• Used to charge a QSE for under-generating, the greater of 5% or 5 MW allowed as a tolerance
• KP is a Settlement Point Price co-efficient. Currently value is 1.
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 15 Texas Nodal
Base Point Deviation for an IRR
• If AABP > HSL – 2 MW, then BPDAMT = 0
• Else, BPDAMT = MAX (0, RTSPP) * MAX (0, TWTG – (¼ * AABP) * ( 1 + 10%))
• Used to charge an Intermittent Renewable Resource for over-generation
• Base Point Deviation will be summed and appear as one Charge Type on Settlement Statement
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 16 Texas Nodal
Base Point Deviation - Exceptions
• Special rules for RMR (exempt, 6.6.5.3), QF (depends on existence of EOC, 6.6.5.3), DSR (various, 6.4.2.2)
• Other operational rules affect whether charge is valid for an interval or for a QSE (ex. Frequency, see 6.6.5.1)
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 17 Texas Nodal
Base Point Deviation Payment
• LABPDAMT = (-1) * BPDAMTTOT * LRS
• Used to allocate results of Base Point Deviation charges to QSEs with load
• This will most likely be a payment back to QSEs with load
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 18 Texas Nodal
RMR Charge Types Flow Diagram
Calculate RMRARF for RMR Resouces. FR7
(PR 6.6.6.1(3))
Level 1Level 2
Level 3Level 4
Calculation Input
Calculate RMRSBAMTQSETOTFR2
(PR 6.6.6.1(4))
RTSPP
RTM MMS
RMRAFLAG
RMRContract
MH
DATA AGGREGATION
Calculate RMRSBAMTTOTFR1
(PR 6.6.6.5)
Calculate LARMRAMTFR56
(PR 6.6.6.5)
RMR CONTRACTDATA
RTMG
RMRTCAP
Level 5
Calculate RMRHREAF for RMR Resouces. FR8
(PR 6.6.6.1(3))
RTMMMS
RMREH
Level 6
RMRCCAP
RMRTA
RMRTCAPA
Calculate RMRCRF for RMR Resouces. FR6
(PR 6.6.6.1(3))
RMRMNFC
Calculate RMRSBPR for RMR Resouces. FR5
(PR 6.6.6.1(3))
RMRIF
Calculate RMRSBAMT for RMR Resouces. FR3
(PR 6.6.6.1(2))
RMRMFCOST
RMRSUFQ
RMRHR
RMREAMT
Calculate RMRVCC for RMR Resouces. FR26
(PR 6.6.6.2(2))
Calculate RMREAMT for RMR Resouces. FR26
(PR 6.6.6.2(1))
FIP
RMRSUFLAG
RMRNPFLAG
RMRH
Calculate RMREAMTQSETOTFR25
(PR 6.6.6.2(3))
Calculate RMREAMTTOTFR24
(PR 6.6.6.5)
Calculate RMRNPAMT for RMR Resouces. FR49
(PR 6.6.6.4(1))
Calculate RMRNPAMTQSETOT FR48 (PR 6.6.6.4(2))
Calculate RMRNPAMT FR47
(PR 6.6.6.5)
Calculate RMRAAMT for RMR Resouces. FR40
(PR 6.6.6.3(2))
Calculate RMRAAMT FR39
(PR 6.6.6.5)
EMREAMT
RUCMWAMT
RUCCBAMT
RUCDCAMT
VSSEAMT
VSSVARAMT
PLATTS DAMMMS
RTSPPENGINE
DAESR
HLRS
H
RMRDAEREVTOT
RMRDAMMWREVTOT
Calculate DAESRTV FR58
(PR 6.6.6.5)
Calculate DAESRTVTTOT
FR57 (PR 6.6.6.5)
Settlement SystemCalculation Driver
RMRCEFA
STARTTYPE
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 19 Texas Nodal
RMR Standby Payments
• RMRSBAMT = (-1) * RMRSBPR• RMRSBPR = RMRMNFC / MH * (1 + RMRIF *
RMRCRF * RMRARF)• Used to pay QSE with an RMR agreement for non-
fuel costs for their RMR unit• RMRIF is the incentive factor for non-fuel costs.
Currently at 10%.• RMRCRF is the reduction factor if RMR unit does
not meet capacity requirements• RMRARF is the reduction factor if RMR unit does
not meet its availability requirements
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 20 Texas Nodal
RMR Payment for Energy
• RMREAMT = (-1) * [((FIP + RMRCEFA) * RMRSUFQ / RMRH) * RMRSUFLAG + ∑ (((FIP + RMRCEFA) * RMRHR + RMRVCC) * RTMG)]
• Used to pay QSE with RMR agreement for energy needed to run unit
• Sigma used to sum intervals for RMRHR and RTMG
• RMRVCC = (RMRMFCOST + ∑ RMREAMT ) / ∑ RTMG
• Sigma used for summing all hours for RMREAMT, and for all intervals for RTMG
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 21 Texas Nodal
RMR Payment for Energy (cont)
• FIP is the Fuel Index Price for Natural Gas• RMRCEFA is the Fuel Adder used for
incorporating the transportation of natural gas to unit
• RMRVCC is the variable cost component used to adjust to the actual fuel costs of the unit
• RMREAMT in the RMRVCC formula is used to back out the payment made to the QSE for the unit from the previous Settlement Statement.
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 22 Texas Nodal
RMR Adjustment Charge
• RMRAAMT = (-1) * ∑ ∑ ( ∑ (RTMG * RTSPP) + ∑ EMREAMT + RUCMWAMT + RUCCBAMT + RUCDCAMT + ∑ VSSVARAMT + ∑ VSSEAMT)
• Used to charge back to the QSE with an RMR agreement all payments for other services for that unit
• Sigmas inside outermost parenthesis are to sum for intervals
• First sigma is to sum for all Resource Nodes and second sigma is to sum for all Resources
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 23 Texas Nodal
RMR Charge for Unexcused Conduct
• RMRNPAMT = $10,000 * RMRNPFLAG
• Used to charge QSE with RMR agreement for an unexcused conduct event on a daily basis
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 24 Texas Nodal
RMR Service Charge
• LARMRAMT = (-1) * (RMRSBAMTTOT - ∑ RMRDAESRTVTOT + RMREAMTTOT + RMRAAMTTOT – (RMRDAEREVTOT + RMRDAMWREVTOT) + RMRNPAMTTOT / H) * HLRS
• Used to allocate to QSEs with load the costs of the RMR service
• Includes payments from the Day-Ahead Market that are NOT paid to the QSE for the RMR units
• This is an hourly charge
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 25 Texas Nodal
Voltage Support Service
• An Ancillary Service that is required to maintain transmission and distribution voltages on the ERCOT Transmission Grid within acceptable limits.
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 26 Texas Nodal
Voltage Support Service Flow Diagram
Calculate VSSVARAMT for Generation Resouces. FR2, FR4
(PR 6.6.7(2)(a))
Level 1Level 2
Level 3Level 4
Calculation
Input
Calculate VSSEAMTQSETOTFR39
(PR 6.6.7.1(3))
RTSPP
URLEAD
RTM MMS
VSSVARIOL VSSVARPR RTVSSAIECLRS
Calculation Driver
RTM MMS(SPP Engine)
Calculate VSSEAMTTOTFR31
(PR 6.6.7.2)
Calculate LAVSSAMTFR29
(PR 6.6.7.2)
Data Aggregation
RTVAR RTMG
URLAG
RTHSLAIEC
Settlement SystemAIEC Calculation Engine
Calculate RTICHSL Generation Resouces. FR16
(To Be Added to Nodal Protocols)
Level 5
Calculate VSSVARLAG for Generation Resouces.
FR3(PR 6.6.7(2)(a))
Calculate VSSVARLEAD for Generation Resouces.
FR5(PR 6.6.7(2)(a))
RTM MMS
LSL
HSL
Calculate VSSEAMT for Generation Resouces. FR15(PR 6.6.7(2)(b))
Settlement System
Calculate VSSVARAMTQSETOTFR38
(PR 6.6.7.1(3))
Calculate VSSVARAMTTOTFR30
(PR 6.6.7.2)
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 27 Texas Nodal
Voltage Support Service Payments (Lag)
• VSSVARAMT = (-1) * VSSVARPR * VSSVARLAG• Used to pay a QSE providing Lagging Voltage
Support• VSSVARLAG = MAX[0, MIN( ¼ * VSSVARIOL,
RTVAR) – ( ¼ * (HSL * 0.32868))]• Used to take the lesser of the instruction or the
lagging voltage provided and compare to voltage being provided
• VSSVARPR is $50.00 / installed kvar or $2.65 for MVar
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 28 Texas Nodal
Voltage Support Service Payments (Lead)
• VSSVARAMT = (-1) * VSSVARPR * VSSVARLEAD• Used to pay a QSE providing Leading Voltage
Support• VSSVARLEAD = MAX{0, [ ¼ * (HSL * 0.32868 * (-
1)) – MAX(( ¼ * VSSVARIOL), RTVAR)]}• Used to take the lesser of the instruction or the
lagging voltage provided and compare to voltage being provided
• VSSVARPR is $50.00 / installed kvar or $2.65 for MVar
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 29 Texas Nodal
Lost Opportunity Payment
• VSSEAMT = (-1) * MAX(0, RTSPP * MAX( 0, ( HSL * ¼ - RTMG)) – ( RTICHSL – RTVSSAIEC * ( RTMG – LSL * ¼ )))
• Used to pay a QSE who provides ERCOT-directed voltage support in lieu of energy
• Used to calculate the back-out amount to result in the lost energy amount
• RTICHSL = RTHSLAIEC * ( ¼ * HSL – ¼ * LSL)• Used to calculate the whole amount of dollars
available over the expanse of the operating capability
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 30 Texas Nodal
Lost Opportunity Payment Diagram
• Lost opportunity Payment
LSL HSL RTMG
$/MWh
MW
Energy Offer Curve
RTSPP * (HSL – RTMG)
VSSEAMT Lost Opportunity Cost
RTVSSAIEC * (RTMG – LSL)
RTICHSL – (RTVSSAIEC * (RTMG – LSL))
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 31 Texas Nodal
Voltage Support Charge
• LAVSSAMT = (-1) * ( VSSVARAMTTOT + VSSEAMTTOT) * LRS
• Used to allocate the payments for voltage support to the QSEs with load
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 32 Texas Nodal
Black Start Service Flow Diagram
Level 1Level 2
Level 3Level 4
Level 5
`
Calculation
Input
Calculate BSSHREAF
Settlement System Creates BBSEH from Black Start Service Contract Agreements
Settlement System
RTM MMSBlack Start Service
Calculation Driver
BSSAFLAG
Calculate BSSARF
Settlement System Retrieves BSSPR from Black Start Service Contract Aggreements
Calculate BSSAMTPR 6.6.8.1 (2)
FR3
Calculate BSSAMTQSETOTPR 6.6.8.1 (3)
FR2
Calculate BSSAMTTOTPR 6.6.8.2
FR1
Level 6
Calculate LABSSAMTPR 6.6.8.2
FR18
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 33 Texas Nodal
Black Start Capacity Payment
• BSSAMT = (-1) * BSSPR * BSSARF
• Used to pay QSEs with Black Start agreements for their readiness to supply the service
• BSSARF is the availability reduction factor based on the availability of the unit throughout the year
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 34 Texas Nodal
Black Start Capacity Charge
• LABSSAMT = (-1) * BSSAMTTOT * HLRS
• Used to allocate the payments for Black Start to the QSEs who have load
• This is an hourly charge
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 35 Texas Nodal
Emergency Energy Flow Diagram
Settlement System
Level 1C
alculation Input
Data Aggregation
Level 2
Real-Time Metered Generation
(RTMG)
EMS (LFC)
Emergency Energy(EMRE)
MMS
Level 3
Real-Time Settlement Point
Price (RTSPP)
Aggregated Emergency Base
Point (AEBP)
Driver
Emergency Base Point Weighted Average Price(EBPWAPR)
Base Point(BP)
Emergency Energy Price
(EMREPR)
Emergency Energy Amount
(EMREAMT)PR 6.6.9.1 (1)
Emergency Energy Amount QSE Total
(EMREAMTQSETOT)PR 6.6.9.1 (2)
Level 4
Emergency Energy Amount Total
(EMREAMTTOT)PR 6.6.9.2
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 36 Texas Nodal
Payment for Emergency Power Increase Directed by ERCOT
• EMREAMT = (-1) * EMREPR * EMRE• Used to pay QSEs who respond to emergency
power requests from ERCOT• EMREPR = MAX (0, EBPWAPR – RTSPP)• Used to calculate the difference between the
Emergency Price and the Real Time Price• EMRE = MAX (0, MIN(AEBP, RTMG) – ¼ * BP• Used to calculate the lesser of the requested or
supplied increase and comparing that to the non-emergency base point
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 37 Texas Nodal
Charge for Emergency Power Increases
• LAEMREAMT = (-1) * EMREAMTTOT * LRS
• Used to allocate payments to QSEs who supply emergency energy to QSEs who have load
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 38 Texas Nodal
Real Time Revenue Neutrality Allocation
Settlement System
Level 1Calculation Input
Settlement System
Load Allocated Real-Time Revenue
Neutrality(LARTRNAMT)PR 6.6.10 (2)
Real-Time DC Import Amount
Total(RTDCIMPAMT-
TOT)
Real-Time DC Export Amount
Total(RTDCEXPAMT-
TOT)
Real-Time Energy Congestion Cost
Amount (RTCCAMTTOT)
RMR Day-Ahead Energy Revenue Sale RT Value
(RMRDAESRV-TOT)
Real-Time Obligation Amount
Total(RTOBLAMTTOT)
Real-Time Option Amount Total
(RTOPTAMTTOT)
Block Load Transfer Resource
Amount(BLTRAMTTOT)
Real-Time Energy Imbalance Amount
Total(RTEIAMTTOT)
Real-Time Option with Refund
Amount Total(RTOPTRAMTTOT)
Load Ratio Share(LRS)
Driver
Real-Time Energy Imbalance Amount
Total(RTEIAMTTOT)
Real-Time DC Export Amount
Total(RTDCEXPAMT-
TOT)
RMR Day-Ahead Energy Revenue Sale RT Value
(RMRDAESRV-TOT)
Real-Time DC Import Amount
Total(RTDCIMPAMT-
TOT)
Real-Time Energy Congestion Cost
Amount (RTCCAMTTOT)
Block Load Transfer Resource
Amount(BLTRAMTTOT)
Real-Time Obligation Amount
Total(NDRTOBLAMTTO
T)
Load Ratio Share(LRS)
Driver
Real-Time Option with Refund
Amount Total(NDRTOPTRAMTT
OT)
Real-Time Option Amount Total
(NDRTOBLRAMTTOT)
Real-Time Option Amount Total
(NDRTOBLAMTTOT)
Real-Time Flow Gate Right Amount
Total(NDRTFGRAMTTO
T)
No Day Ahead Market
(NODAMFLAG)
Driver
No Day Ahead Market
(NODAMFLAG)
Driver
Settlement System
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 39 Texas Nodal
Real Time Revenue Neutrality Allocation
• If the Day-Ahead Market Executes:• LARTRNAMT = (-1) * ( RTEIAMTTOT +
BLTRAMTTOT + RTDCIMPAMTTOT + RTDCEXPAMTTOT + RTCCAMTTOT + RMRDAESRTVTOT + RTOBLAMTTOT * ¼ + RTOPTAMTTOT * ¼ + RTOPTRAMTTOT * ¼ ) * LRS
• Used to allocate all unallocated amounts to QSE with load
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 40 Texas Nodal
Real Time Revenue Neutrality Allocation
• If the Day-Ahead Market does not execute:• LARTRNAMT = (-1) * ( RTEIAMTTOT +
BLTRAMTTOT + RTDCIMPAMTTOT + RTDCEXPAMTTOT + RTCCAMTTOT + RMRDAESRTVTOT + NDRTOBLAMTTOT * ¼ + NDRTOPTAMTTOT * ¼ + NDRTOPTRAMTTOT * ¼ + NDRTOBLRAMTTOT * ¼ + NDRTFGRAMTTOT * ¼ ) * LRS
• Used to allocate all unallocated amounts to QSEs with load
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 41 Texas Nodal
ERCOT Administration Fee
Settlement System
Level 1
Calcu
lation
Inp
ut
Data Aggregation
Real-Time Adjusted Metered Load
(RTAML)
Driver
Settlement System
ERCOT System Administration
Charge(ESACAMT)PR 9.16.1
Load Administration Fee Factor
(LAFF)
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 42 Texas Nodal
ERCOT Administration Fee
• ESCAMT = LAFF * ∑ RTAML
• Fee charged to cover ERCOT expenses
• Sigma is the sum over all settlement points for a QSE
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 43 Texas Nodal
RT Energy Settlements
• Questions
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 44 Texas Nodal
RMRSBAMT – CRF!
• If (RMRTCAPA + RMRTCAP) ≥ RMRCCAP
• Then RMRCRF = 1
• Otherwise
• RMRCRF = Max [0, 1 – 2 *
• (RMRCCAP – RMRTCAP) / RMRCCAP]
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 45 Texas Nodal
RMRSBAMT – ARF!
• If (RMRHREAF RMRTA) then RMRARF = 1• Otherwise,• RMRARF = Max [0, 1 – (RMRTA – RHREAF) *
2]
• If (RMREH < 4380) then RMRHREAF = 1• Otherwise,
• RMRHREAF =∑(RMRAFLAG) / 4380
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 46 Texas Nodal
Net Metering Agreement Examples
SP
PL1
NMC 1Percentage MW Price NMSAMTTOT
PL1 100% 20 $50.00 $1,000.00
Net Metering Agreement 1Single Resource
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 47 Texas Nodal
Net Metering Agreement Examples
SP
PL1 PL3PL2
NMC 2 Resource OnlyPercentage MW Price NMSAMTTOT
PL1 33.3% 20 $50.00 $3,325.00PL2 25.0% 15 $55.00PL3 41.7% 25 $60.00
Total: 60
Net Metering Agreement 2Resource Only
© 2005 - 2006 Electric Reliability Council of Texas, Inc. All rights reserved. 48 Texas Nodal
Net Metering Agreement Examples
PL4
SP
PL1 PL3PL2
Net Metering Agreement 3Load and Resource
NMC 3 Resource and Load for GSPLITPER For NMSAMTTOTPercentage MW MW Price NMSAMTTOT
PL1 30.8% 16 20 $50.00 $2,688.00PL2 0.0% 0 -5 $47.00PL3 69.2% 36 40 $51.00PL4 0.0% 0 -3 $39.00
Total: 52 52