Reliability and Reliability and Operations Operations

Subcommittee ReportSubcommittee Report

Presentation to thePresentation to the

ERCOT Technical Advisory CommitteeERCOT Technical Advisory Committee

January 6, 2005January 6, 2005

Voting ItemsVoting Items

• OGRR 157 – Delete Test Form for Non-OGRR 157 – Delete Test Form for Non-Spin - Spin - Remove unit specific non-spin test Remove unit specific non-spin test form from Operating Guides. No form from Operating Guides. No comments received.comments received.

• OGRR 158 – Consistent UF Relay Trip OGRR 158 – Consistent UF Relay Trip Time Language - Revise Operating Guide Time Language - Revise Operating Guide 2.9.1 (Automatic Firm Load Shedding) to 2.9.1 (Automatic Firm Load Shedding) to be consistent with approved OGRR150 be consistent with approved OGRR150 (Clarification of UF Relay Trip Time for (Clarification of UF Relay Trip Time for Load Shedding).Load Shedding).

Other ROS ActivitiesOther ROS Activities

• A Double Circuit Outage A Double Circuit Outage Contingency Ad Hoc group was Contingency Ad Hoc group was formed to review Operating Guide 4.3 formed to review Operating Guide 4.3 Operation to Maintain Transmission Operation to Maintain Transmission and draft a recommendation to the and draft a recommendation to the ROS in February/March. ROS in February/March.

First meeting January 18, 2005.First meeting January 18, 2005.

Reliable Fuel Operations in ERCOT Reliable Fuel Operations in ERCOT UpdateUpdate

Task Force has had two conference calls since the last Task Force has had two conference calls since the last TAC meeting to discuss perspectives on the TAC meeting to discuss perspectives on the Alternative Fuel Survey.Alternative Fuel Survey.

To better determine system reserves, the Task Force has To better determine system reserves, the Task Force has asked ERCOT to provide “raw data” behind survey asked ERCOT to provide “raw data” behind survey results. All units will be listed by fuel type, not name.results. All units will be listed by fuel type, not name.

The Task Force is also trying to determine the current The Task Force is also trying to determine the current status of gas availability in ERCOT.status of gas availability in ERCOT.

Survey has not been fully vetted at ROS.Survey has not been fully vetted at ROS.

Reliable Fuel Operations in Reliable Fuel Operations in ERCOT UpdateERCOT Update

Variables:Variables:• Generation – no obligation to serveGeneration – no obligation to serve• Maintenance Schedules – no coordination Maintenance Schedules – no coordination

of planned Resource maintenanceof planned Resource maintenance• Loads – Relaxed Balanced SchedulesLoads – Relaxed Balanced Schedules• ERCOT Emergency Procedures – no ERCOT Emergency Procedures – no

notification in advance of need for oilnotification in advance of need for oil• Gas curtailments of generation can also Gas curtailments of generation can also

curtail some loads.curtail some loads.

Reliable Fuel Operations in Reliable Fuel Operations in ERCOT UpdateERCOT Update

Variables continued:Variables continued:

• While there are known gas capability or While there are known gas capability or supply problems during periods of high supply problems during periods of high demand, there are market incentives to demand, there are market incentives to continue to build efficient gas units.continue to build efficient gas units.

• The market incentive to “mothball” older The market incentive to “mothball” older units with poor heat rates may also reduce units with poor heat rates may also reduce those units with dual fuel capability.those units with dual fuel capability.

Reliable Fuel Operations in Reliable Fuel Operations in ERCOT UpdateERCOT Update

Discussion Topics for Possible Discussion Topics for Possible Recommended Solutions:Recommended Solutions:

• Re-examine ERCOT Emergency Re-examine ERCOT Emergency Procedures Procedures

• Gas transmission system status – Gas transmission system status – improvements, pre-determined priorities improvements, pre-determined priorities for users, etc.for users, etc.

• Provide incentives for Alternate Fuel unitsProvide incentives for Alternate Fuel units