ROS Report to TAC October 5, 2007

Outline  General Items  Nodal Operating Guides  OGRR192  Document control issues  Proposed revisions to Texas Nodal Telemetry Criteria and State Estimator Performance Stanadards

General Items  OGR 198 – Setup work group to address comments concerning shedding firm load via SCADA  Work group will address PUCT request to review load shedding procedures  Wind Survey Results – still awaiting responses  NERC will provide interpretation of standards

Nodal Operating Guides  NOGRR001, Nodal Operating Guides – Section 1, Overview (Vote)  NOGRR002, Nodal Operating Guides – Section 2, System Operations and Control Requirements - Remand back to ROS to address ERCOT Staff comments (Vote)  NOGRR003, Nodal Operating Guides – Section 3, Resource Testing and Qualification Procedures (Vote)  NOGRR004, Nodal Operating Guides – Section 4, Emergency Operation (Vote)  NOGRR005, Nodal Operating Guides – Section 5, Planning (Vote)  NOGRR006, Nodal Operating Guides – Section 6, Disturbance Monitoring and System Protection (Vote)  NOGRR007, Nodal Operating Guides – Section 7, Telemetry and Communication Vote)

Nodal Operating Guides  NOGRR008, Nodal Operating Guides – Section 8, Attachment A, Detailed Black Start Information (Vote)  NOGRR009, Section 8, Attachment B, Relay Misoperation Report (Vote)  NOGRR010, Section 8, Attachment C, Turbine Governor Speed Tests (Vote)  NOGRR011, Section 8, Attachment D, Seasonal Unit Net Real Power Capability Verification (Vote)  NOGRR012, Section 8, Attachment E, Biennial Unit Reactive Limits (Lead and Lag) Verification (Vote)  NOGRR013, Section 8, Attachment F, Seasonal Hydro Responsive Reserve Net Capability Verification (Vote)  NOGRR014, Section 8, Attachment G, Load Resource Tests (Vote)  NOGRR015, Section 8, Attachment H, Unit Alternative Fuel Capability (Vote)

Nodal Operating Guides  Notice of NOGRR Rejections: –NOGRR016, Section 8, Attachment I, Security, Facilities, and Connectivity of WAN Systems –NOGRR017, Section 8, Attachment J, ERCOT Data Sets  Request that proposed changes to NOGRRs and NPRRS that deviate from current operating practices be remanded to ROS

Operating Guide  OGRR192, Combustion Turbine Governor Performance Test Forms (Vote)

Issues With Document Control  Criteria, Handbooks, Standards (Not NERC or TRE Standards), Work Papers etc.  Quasi Requirements –Consequences for not meeting? –Who is monitoring compliance?  No defined owner for documents  No control process for updating document  Undefined voting structures  Potential for conflicting information  Duplication of effort

Document Change Timeline  September 10, 2007 – ERCOT staff submitted changes to existing Texas Nodal Telemetry Criteria and State Estimator Standards for comment  September 17, ROS hosted workshop  September 24, NDSWG hosted workshop  October 1, ROS hosted workshop  October 4, ROS approved Telemetry Criteria via

Texas Nodal Market State Estimator Standards  Postponed vote due to potential duplication or conflict with Nodal Protocols

Texas Nodal Market Telemetry Criteria  ROS voted by to approve Texas Nodal Market Telemetry Criteria –Affirmative 13 (70% weighted) –Negative 3 (30% weighted) –Abstain – 1  Dissenting comments concerning performance metrics and response times  ROS setting up process to monitor and update metrics

Texas Nodal Market Telemetry Criteria  Section B Requirements: –R6, Minimum Telemetry Criteria (Vote) –R7, Telemetry Availability (Vote) –R9, Critically Important Telemetry (Vote) –R10, Availability for Critically Important Telemetry (Vote) –R13, Requests for Additional Telemetry (Vote)

Questions?