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ERCOT Monthly Operational Overview ( March 2012 ) April 12, 2012. Grid Operations & Planning. Content. Operations Peak Demand: Actual vs. Forecast On-line Resources: Total at Peak and Wind CPS1 Monthly Performance Historical Peak and Minimum Loads

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content
Content
  • Operations
    • Peak Demand: Actual vs. Forecast

On-line Resources: Total at Peak and Wind

    • CPS1 Monthly Performance
    • Historical Peak and Minimum Loads
    • Day-Ahead Load Forecast Performance
    • Reliability Unit Commitment Capacity (RUC) by weather zone
    • Generic Transmission Limits (GTLs)
    • Advisories, Watches and EEAs
    • Significant System Incidents
    • Cooling Reservoir Level Update
  • Planning Activities
    • Summary
    • Generation Interconnection Requests
    • Wind Capacity

ERCOT Public

slide4
March 2012 Daily Peak Demand: Hourly Average Actual vs. Forecast, Wind Day-Ahead COPs & On-line Capacity at Peak

Note: All data are hourly averages during the peak load hour obtained from COPs, and EMMS.

ERCOT Public

march 2012 actual wind output plus curtailments vs wind day ahead cops for all hours
March 2012 Actual Wind Output plus Curtailments vs. Wind Day-Ahead COPs for All Hours

% of Hours when Estimated Uncurtailed Wind Output

>= COP HSLs (Target = 50%)

52%

Note: QSEs must use the AWST 50% probability of exceedance forecast as the HSL in their COPs

ERCOT Public

march 2012 ercot s cps1 monthly performance
March 2012 ERCOT’s CPS1 Monthly Performance

CPS1 12 Month Rolling Average = 152.45%

ERCOT Public

march 2012 generic transmission limits gtls
March 2012 Generic Transmission Limits (GTLs)

GTL: A transmission flow limit more constraining than a Transmission Element’s normal limit established to constrain flow between geographic areas of the ERCOT Transmission System that is used to enforce stability and voltage constraints that cannot be modeled directly in ERCOT’s transmission security analysis applications.

Note: This table lists how many times a constraint has been activated to avoid exceeding a GTL limit, it does not imply an exceedance of the GTL occurred.

April 12, 2012

ERCOT Public

advisories and watches in march 2012
Advisories and Watches in March 2012
  • Advisories issued for Physical Responsive Capability (PRC) below 3000 MW.
    • Issued 13 Days
  • Watches issued for Physical Responsive Capability (PRC) below 2500 MW.
    • 1 Watch issued for PRC below 2500 MW.
  • Transmission Watches
    • March 8th At 13:32 ERCOT issued a Transmission Watch due to contingency overload.
    • March 19th At 13:50 ERCOT issued a Transmission Watch due post contingency overload due to forced outages in Hillsboro area. A TOAP was developed and put in place.
    • March 26th At 13:56 ERCOT issued a Transmission Watch for the Far West area.
    • March 27th At 11:31 ERCOT issued a Transmission Watch for the Far West area.
    • March 29th At 14:47 ERCOT issued a Transmission Watch for the Far West area due to a planned bus outage.
  • Energy Emergency Alerts
    • None

ERCOT Public

cooling reservoir levels update 01 april 2012
Cooling Reservoir Levels Update – 01 April 2012

* In Feet above Mean Sea Level

ERCOT Public

planning summary march 2012
Planning Summary – March 2012
  • ERCOT is currently tracking 128 active generation interconnection requests totaling over 34,000 MW. This includes over 19,000 MW of wind generation.
  • ERCOT is currently reviewing proposed transmission improvements with a total cost of $74.2 Million
  • Transmission Projects endorsed in 2012 total $394 Million
  • All projects (in engineering, routing, licensing and construction) total approximately $9.84 Billion
  • Transmission Projects energized in 2012 total about $108.8 million

ERCOT Public

county location of planned generation with interconnection requests all fuels march 2012
County Location of Planned Generation with Interconnection Requests (all fuels) March 2012

ERCOT Public

county location of planned generation with interconnection requests wind march 2012
County Location of Planned Generation with Interconnection Requests (Wind) March 2012

ERCOT Public

slide28

CRR Price Convergence – March 2012

Congestion Revenue Right cost in auction convergence with

payment in Day-Ahead Market

ERCOT Public

reliability services march 2012
Reliability Services – March 2012
  • RUC Cost continue to trend low as compared to previous months.
  • March 2012 cost was $0.01M, compared to:
  • A charge of $0M in Feb 2012
  • A charge of $0.9M in March 2011

April 12, 2012

ERCOT Public

ancillary services march 2012
Ancillary Services – March 2012
  • Capacity Services costs were slightly increased from last month.
  • March 2012 cost was $25.61M, compared to:
  • A charge of $14.87M in Feb 2012
  • A charge of $36.21M in March 2011

ERCOT Public

energy settlement march 2012
Energy Settlement – March 2012

Day-Ahead  and Real-Time energy settlement similar to February, but much lower than the average costs in 2011 and reflective of lower prices seen year-to-date in 2012.

ERCOT Public

congestion revenue rights crr march 2012
Congestion Revenue Rights (CRR) – March 2012
  • Congestion Revenue Rights were fully funded.
  • Excess funds available for distribution to load.

ERCOT Public

revenue neutrality march 2012
Revenue Neutrality – March 2012
  • Revenue Neutrality trending higher, increase can be attributed to pockets of local congestion causing prices to spike.
  • March 2012 was a charge of $8.29M, compared to:
  • $0.23M in Feb 2012
  • $1.13M in Mar 2011

ERCOT Public

net uplift to load march 2012
Net Uplift to Load – March 2012
  • Net uplift to load trending higher, increases can be attributed to overall increases in Revenue Neutrality and Ancillary Services.
  • March 2012 was a charge of $14.67M, compared to:
  • $2.5M in Feb 2012
  • $27.3M in Mar 2011

ERCOT Public

slide35

Advanced Meter Settlement Impacts – March 2012

March 2012: Now settling 4.8M ESIIDs using Advanced Meter data.

March 2012: 84.2% of the load in ERCOT is settled with 15-min interval data (AMS, Competitive IDR, and NOIE IDR).

ERCOT Public

slide36

ERCOT Wide Load Volumes by Meter Type – INITIAL

Settlement – March 2012

ERCOT Public

retail transaction volumes summary march 20121
Retail Transaction Volumes – Summary – March 2012

Switches

Move-Ins

Move-Outs

Mass Transition

ERCOT Public

retail performance measures switch march 2012
Retail Performance Measures – Switch – March 2012

1st Quarter

2nd Quarter

3rd Quarter

4th Quarter

ERCOT Public

retail performance measures priority move in march 2012
Retail Performance Measures (Priority Move-In) – March 2012

1st Quarter

2nd Quarter

3rd Quarter

4th Quarter

ERCOT Public

retail performance measures standard move in march 2012
Retail Performance Measures (Standard Move-In) – March 2012

1st Quarter

2nd Quarter

3rd Quarter

4th Quarter

ERCOT Public