ERCOT Readiness Criteria And Current

1

• ERCOT Readiness Criteria And Current
• Status For The Pilot Project
• July 12, 2001

2

• Customer Switching
• Criteria
• ERCOT must be able to perform up to 21,000
  customer transactions per day no later than 8/20
• Status
• Performance tests show ERCOT can process over
  21,000 transactions per day
• Performance test code was placed in production on
  7/7
• Production verification is in progress and will
  be completed no later than 7/20

3

• EDI Database Maintenance
• Criteria
• All EDI backlog (most recent 3 months) must be
  eliminated except for error backlog (less than
  5)
• Status
• More than 95 of ESI IDs have been successfully
  converted
• 76 of customer usage files have been
  successfully converted
• 24 of customer usage files have been returned to
  TDSPs with errors
• ERCOT expects to receive corrected files by 7/15

4

• Customer Usage Processing
• Criteria
• All ongoing meter read data must be processed on
  time (700,000/day)
• Status
• Performance tests show ERCOT can process over
  700,000/day
• Awaiting production verification no later than
  7/20
• Resource Metering
• Criteria
• All needed resource metering must be installed,
  communicating and site certified
• Status
• Metering is installed, communicating with ERCOT
  and site certification is underway (by TDSPs)

5

• ERCOT System Load Forecasting
• Criteria
• Average medium term load forecast error in ERCOT
  system must be less than 5
• Average short term load forecast error in ERCOT
  system must be less than 3
• Status
• Average medium term load forecast error is 2.26
• Average short term load forecast error is
• 1.72 for 45 minute ahead
• 0.56 for 5 minute ahead

6

• SCADA And Network Analysis
• Criteria
• ERCOT must demonstrate ability to perform
  sustained single control area operations
• Protocols require received QSE RTU data accuracy
  to be within 3
• Status
• ERCOT is performing single control area operation
  in accordance with the test schedule
• QSE RTU data received is accurate to within 1

7

• Market Requirements Publishing (A/S, losses)
• Criteria
• ERCOT must publish load ratio shares within 10
  of historical value to QSEs
• Status
• ERCOT is publishing market requirements, and
  system values will be within 10 of historical
  value once EDI backlog is cleared. Manual work
  around is currently being used successfully
• Outage Scheduling
• Status
• All outage requests are being received and
  processed by ERCOT

8

• Energy Scheduling
• Criteria
• Balanced energy schedules must be received from
  all participating QSEs
• 90 of resource plans must be valid prior to
  entering operating period
• Status
• Balanced energy schedules are being received from
  all participating QSEs representing resources and
  load
• ERCOT is encouraging QSEs to update resource
  plans
• The API and Portal are being tuned on a
  continuous basis to improve performance.

9

• Balancing Energy And A/S Bidding
• Criteria
• Ancillary service and balancing energy market
  systems must be receiving bids and solving
• Market clearing prices must be accurate
• Status
• Market systems are receiving bids and clearing
• Current market clearing price processing errors
  must be remedied by 7/13

10

• Market Notifications To QSEs
• Criteria
• QSEs must be notified of all ancillary
  service/balancing energy awards and congestion
  management requirements
• Status
• Most QSEs are receiving all ancillary
  service/balancing energy award notifications and
  congestion management communications
• Individual QSE problems are being addressed

11

• Power System Operations
• Criteria
• Initially, frequency must be controlled between
  59.95 and 60.05 Hz on a consistent basis
• Longer term, frequency control must consistently
  meet NERC CPS 12 standards
• Congestion Management must function properly
• Status
• Frequency is consistently between 59.95 and 60.05
  Hz
• On 7/10 CPS1 at 126 - passing is 100 - Passes
• CPS2 at 84 - passing is 90 -
  fails
• Control parameter tuning is in progress
• Zonal congestion is functioning and further
  system improvements will be installed no later
  than 7/13

12

• Settlement
• Criteria
• Settlement must be calculated in accordance with
  ERCOT Protocols
• Status
• Settlements are being calculated in accordance
  with the protocols, however inaccurate market
  clearing prices and the EDI backlog are affecting
  settlement accuracy
• Statements
• Criteria
• Statements must be published in accordance with
  the protocols
• Status
• Statements are being published in accordance with
  the protocols