Operations; Settlements

Wed, Aug 26, 2020 12:06 PM

M-A070820-02 Potential Price Corrections - Incorrect Transformer Ratings Impacting the Real-Time Market and Day-Ahead Market


NOTICE DATE: August 26, 2020

NOTICE TYPE: M-A070820-02 Operations

SHORT DESCRIPTION: Potential Price Corrections - Incorrect Transformer Ratings Impacting the Real-Time Market and Day-Ahead Market

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: June 8, 2020 - July 6, 2020

LONG DESCRIPTION: On July 8, 2020, ERCOT issued Market Notice M-A070820-01 informing Market Participants that ERCOT would likely seek review by the ERCOT Board of Directors (Board) of Day-Ahead Market (DAM) and Real-Time Market (RTM) prices for various Operating Days (ODs) between 06/08/2020 and 07/06/2020. 

DAM

ERCOT has determined that Day-Ahead Settlement Point Prices (DASPPs), DAM Market Clearing Prices for Capacity (MCPCs), and DAM Locational Marginal Prices (LMPs) for Electrical Buses for the following ODs are in need of correction:

  • 06/08/2020 - 06/12/2020;
  • 06/15/2020 - 06/17/2020;
  • 06/19/2020 - 06/20/2020;
  • 06/24/2020 - 06/25/2020; and
  • 06/28/2020 - 07/06/2020.

 

Summary of Impacted DASPPs & DAM MCPCs

OD

DASPPs

DAM MCPCs

# Impacted

Max Change

Min Change

# Impacted

Max Change

Min Change

06/08/2020

12674

10.21

-5.52

33

1.04

-3.46

06/09/2020

12817

5.57

-10.85

39

1.4

-6.55

06/10/2020

13484

0.33

-1.68

30

1.19

-0.25

06/11/2020

15297

5.57

-3.89

45

2.67

-0.75

06/12/2020

13598

6.7

-2.46

31

5.15

-0.58

06/15/2020

16138

10.35

-2.83

53

8.6

-8.72

06/16/2020

2727

0.32

-0.64

4

0.01

-0.01

06/17/2020

9252

1.26

-0.99

17

1.5

-0.03

06/19/2020

2512

1.12

-1.12

3

0.01

-0.01

06/20/2020

4126

9.69

-9.4

3

0.01

-0.03

06/24/2020

13749

3.09

-0.89

44

4.82

-1.13

06/25/2020

9709

0.09

-1.03

13

0.18

-0.3

06/28/2020

12429

2.12

-2.68

18

0.38

-0.13

06/29/2020

10923

3.66

-3.65

24

0.52

-1.19

06/30/2020

4784

1.42

-1.38

10

0.11

-0.07

07/01/2020

6586

2.31

-5.61

11

0.04

-0.04

07/02/2020

6318

7.81

-3.38

15

0.05

-0.06

07/03/2020

14478

3.11

-12.59

30

0.45

-1.44

07/04/2020

7837

3.52

-3.18

17

0.17

-0.09

07/05/2020

8066

15.12

-6.83

17

0.15

-0.17

07/06/2020

9969

9.86

-10.67

17

0.76

-0.34

Note: # Impacted represents the total number of potential price changes, while Max/Min Change represents the range of price changes—a positive value indicates price increase with correction; a negative value indicates price reduction with correction.

 

RTM

ERCOT has determined that Real-Time Settlement Point Prices (RTSPPs), Real-Time Price for Energy Metered for Resources (RTRMPRs), and Real-Time Locational Marginal Prices (LMPs) for Electrical Buses for OD 07/01/2020 are in need of correction.

Summary of Impacted RTSPPs & RTRMPRs

OD

RTSPPs

RTRMPRs

# Impacted

Max Change

Min Change

# Impacted

Max Change

Min Change

07/01/2020

5505

50.93

-367.48

4537

50.6

-369.22

Note: # Impacted represents the total number of potential price changes, while Max/Min Change represents the range of price changes—a positive value indicates price increase with correction; a negative value indicates price reduction with correction.

 

Board Review

ERCOT will seek ERCOT Board review of DAM and RTM prices for certain ODs, as described in this Market Notice, at the October 2020 Board meeting.

ADDITIONAL INFORMATION: ERCOT will present the impact analyses concerning these potential price corrections at the September Wholesale Market Subcommittee (WMS) meeting and Technical Advisory Committee (TAC) meeting. Supporting documents and re-calculated prices will be included in materials for the October 2020 Board meeting.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.

If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

 

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