Base Point Deviation Charges for Energy Storage Resources

Base Point Deviation Charges for Energy Storage Resources

Base Point Deviation Charges for Energy Storage Resources Magie Shanks ERCOT BESTF Meeting 10/18/2019 Overview NPRR963 introduces: The aggregation of the Generation Resource and the Controllable Load Resource for an energy storage resource into a group, Generation and Controllable Load Resource (GCLR) Group. Proposes a new methodology for calculating Energy Storage Resource Energy Deployment Performance (ESREDP) metric. Proposes a new methodology for calculating Base Point Deviation for the GCLR Group. PUBLIC 2 Base Point Deviation Settlement Current Base Point Deviation Settlement: The over/under performance of the energy storage resource is analyzed individually for the Generation Resource and the Controllable Load Resource, not as a group, per NP 6.6.5, Base Point Deviation Charge. Proposed Base Point Deviation Settlement w/NPRR963: Energy storage resources will be aggregated in a Generation and Controllable Load Resource (GCLR) Group and the over/under performance will be analyzed as a group. New deviation tolerances for GCLR Group PUBLIC 3 Example Controllable Load Resource (CLR) receives a base point at 25 MW (charging) Generation Resource (GR) at 0 MW Both Receive simultaneous Reg-Up Instructions GR receives 10MW instruction CLR receives 13MW instruction

ESR provides full response by reducing consumption on CLR PUBLIC 4 Example Current BPD Settlement Generation Resource (Under Generation) Proposed BPD Settlement Controllable Load Resource (Under Consumption) GCLR Group AABP (BP + RegUp) = (0 +10) 10MW AABP (BP RegUp) = (25-13) 12MW Net AABP = (10-12) -2MW TWTG 0MW ATPC 2MW Net Performance (TWTG-ATPC) -2MW Tolerance: Min(MW, %): MW Limit (AABP - 5MW) % Limit (AABP *0.95)

Tolerance: Min(MW, %): 5MW 9.5MW MW Limit (AABP -2MW) % Limit (AABP *0.90) 10MW Deviation 0MW or 0MWh RTSPP $20/MWh 10.8MW BPDAMT (RTSPP * Deviation) Deviation (Tolerance-TWTG) 5MW or 1.25MWh Deviation (Tolerance-ATPC) RTSPP $20/MWh RTSPP BPDAMT (RTSPP * Deviation) $25 BPDAMT (RTSPP * Deviation) $0 8MW or 2MWh $20/MWh

$40 AABP = Adjusted Aggregated Base Point ATPC = Average Telemetered Power Consumption TWTG = Time Weighted Telemetered Generation RTSPP = Real-Time Settlement Point Price BPDAMT = Base Point Deviation Amount PUBLIC 5 Deviation Tolerances Generation Resource: Over and Under Generation is 5MW or 5% Controllable Load Resource: Over Consumption: Carrying Ancillary Service (AS) is 2MW or 15% Not carrying AS is 2MW or 25% Under Consumption: Carrying AS is 2MW or 10% Not carrying AS is 2MW or 15% GCLR Group: Over and Under Performance is 3MW or 3% PUBLIC 6 Questions? PUBLIC 7 Energy Storage Resource Energy Deployment Performance (ESREDP) Luke Butler ERCOT BESTF Meeting 10/18/2019 Why ESREDP?

Energy storage resources (ESR)* Actual vs Model (cont.) Our system does not recognize that ESR-GR/CLR are part of the same device. ESR-GR currently scored using Generation Resource Energy Deployment Performance (GREDP) ESR-CLR currently scored using Controllable Load Resource Energy Deployment Performance (CLREDP) In reality, an ESR is a single device and can only respond in one direction, i.e., ESRs can only consume or inject power at any given instant. Goal: Create a metric that captures performance of the ESR as a whole *Energy storage resource (ESR) is not yet a defined ERCOT term. PUBLIC Example Example 1 PUBLIC QSE holds 50 MW Regulation-Up Responsibility (RURS) on ESR Telemetered RURS as 25 MW on ESR-GR and 25 MW on ESR-CLR ESR-CLR Base-Point at 25 MW (charging) ESR-GR at 0 MW Both Receive simultaneous Reg-Up Instructions ESR provides full response by reducing consumption on ESR-CLR Example MW ESR-GR REG REQUEST 50.0 45.0 40.0 35.0 30.0 25.0

20.0 15.0 10.0 5.0 0.0 ESR REG REQUEST 0 1 2 3 4 5 6 7 8 9 10 MW ESR-GR REG REQUEST MW ESR-CLR REG REQUEST 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0

5.0 0.0 0 1 2 3 4 5 6 ESR REG REQUEST 0 1 2 3 4 5 6 7 ESR-CLR REG REQUEST PUBLIC 50.0 45.0 40.0 35.0 30.0 25.0 20.0

15.0 10.0 5.0 0.0 8 9 10 7 8 9 10 Example MW ESR-GR RESPONSE 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 ESR RESPONSE 0 1 2 3

4 5 6 7 8 9 10 MW ESR-GR RESPONSE ESR-GR BP MW ESR-CLR RESPONSE 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 25.0 20.0 15.0 10.0 5.0 0.0 0 1 2

3 4 5 6 ESR RESPONSE 0 1 2 3 4 5 6 7 ESR-CLR RESPONSE ESR-CLR BP PUBLIC 50.0 45.0 40.0 35.0 30.0 8 9 10 7

8 9 10 Example Scoring* performance at the individual Resource level using GREDP/CLREDP metrics Current protocol requirement must have a GREDP/CLREDP less than the greater of 8% or 8 MW perfect performance gives score of 0% and 0 MW |[( G REDP ( % ) = ATG AEPFR 1.0 100 ABP + ARI ]| ) ATG = Average Telemetered Generation ARI = Average Regulation Instruction AEPFR = Average Estimated Primary Frequency Response ABP = Average Base Point G REDP ( MW ) =|( ATG ABP ARI AEPFR)| |[( C LREDP ( % )= GREDP (%) GREDP (MW) 100 8.14 ATPC + AEPFR 1.0 100 ABP ARI

) ]| C LREDP ( MW )=|( ATPC ( ABP ARI AEPFR ))| ATPC = Average Telemetered Power Consumption ARI = Average Regulation Instruction AEPFR = Average Estimated Primary Frequency Response ABP = Average Base Point CLREDP (%) CLREDP (MW) 48.25 8.14 *Assuming example is across a 5-min period PUBLIC GREDP/CLREDP vs ESREDP (%) Combining scoring formulas to create an ESR net performance score ATG ATPC + AEPFR AEPFR 1.0 1.0 100 100 ABP ABP + ARI ARI |[|([(

C G LREDP REDP ( % (% )= )= |[ ( ESREDP ( % )= PUBLIC )) ]|]| ]| ( ATG GEN . AEPFR ) ( ATPC + CLR . AEPFR ) 1.0 100 (GEN . ABP +GEN . ARI ) (CLR . ABP CLR . ARI ) ) GREDP/CLREDP vs ESREDP (MW) C MW ))= =|( ATPC ( ABP ARI AEPFR AEPFR))|)| G LREDP REDP ( (MW ATG ABP ARI ) PUBLIC Example Scoring* performance using ESREDP

|[ ( |[ ( ESREDP ( % )= ESREDP ( % )= ]| ( ATG GEN . AEPFR ) ( ATPC+ CLR . AEPFR) 1.0 100 (GEN . ABP +GEN . ARI ) (CLR . ABP CLR . ARI ) ) ]| |[( ( 0 0 ) ( 8.727+0) 1.0 100 ( 0+ 8.136 ) ( 25 8.136) ) 8.73 1.0 100 8.73 ) ]| ) ) ) ESREDP (%) ESREDP (MW) 0

0 *Assuming example is across a 5-min period PUBLIC Example 2 Example 2 PUBLIC QSE holds 50 MW Regulation-Up Responsibility (RURS) on ESR Telemetered RURS as 25 MW on ESR-GR and 25 MW on ESR-CLR ESR-CLR Base-Point at 25 MW (charging) ESR-GR at 0 MW Both Receive simultaneous Reg-Up Instructions ESR provides full response with a combination of reducing consumption on ESR-CLR and injecting with ESR-GR Example 2 MW GR REG REQUEST 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 ESR REG REQUEST

0 1 2 3 4 5 6 7 8 9 10 MW GEN REG REQUEST MW CLR REG REQUEST 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 0 1

2 3 4 5 6 ESR REG REQUEST 0 1 2 3 4 5 6 CLR REG REQUEST PUBLIC 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 7 8

9 10 7 8 9 10 Example 2 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 ESR RESPONSE 0 1 2 3 4 5 6 7 GEN RESPONSE

8 9 10 GR BP MW MW GR RESPONSE MW CLR RESPONSE 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 0 1 2 3 4 5 6 ESR RESPONSE 0

1 2 3 4 CLR RESPONSE PUBLIC 50.0 45.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 5 6 7 8 CLR BP 9 10 7 8 9 10

Example Scoring* performance at the individual Resource level using GREDP/CLREDP metrics Current protocol requirement must have a GREDP/CLREDP less than the greater of 8% or 8 MW perfect performance gives score of 0% and 0 MW |[( G REDP ( % ) = ATG AEPFR 1.0 100 ABP + ARI |[( C LREDP ( % )= ]| ) G REDP ( MW ) =|( ATG ABP ARI AEPFR)| GREDP (%) GREDP (MW) 85.71 8.18 ATPC + AEPFR 1.0 100 ABP ARI ) ]| C LREDP ( MW )=|( ATPC ( ABP ARI AEPFR ))| CLREDP (%) CLREDP (MW)

52.94 8.18 *Assuming example is across a 5-min period PUBLIC Example 2 Scoring* performance using ESREDP (|[ ( ( ]| ATG GEN . AEPFR ) ( ATPC+ CLR . AEPFR) 1.0 100 GEN . ABP +GEN . ARI ) (CLR . ABP CLR . ARI ) ESREDP ( % )= ) ) |[ ( ESREDP ( % )= ]| |[( ( 1.364 0 ) (7.273 +0) 1.0 100 ( 0+ 9.545 ) ( 25 9.545) ) 5.91 1.0 100 5.91 ) ]|

) ESREDP (%) ESREDP (MW) 0 0 *Assuming example is across a 5-min period PUBLIC ESREDP vs GREDP/CLREDP Criteria GREDP and CLREDP: Must be less than the greater of X % or Y MW for 85% of the fiveminute clock intervals in the month during which GREDP/CLREDP is calculated X and Y are currently set to 8% or 8 MW ESREDP criteria uses new variables Must be less than the greater of V % or W MW for 85% of the fiveminute clock intervals in the month during which ESREDP is calculated Proposing to initially set V and W both to 3 PUBLIC 22 Questions? PUBLIC 23

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