Presented to Kent Saathoff, Bill Blevins, John Adams, Prakash Shreshtha - ERCOT Austin, TX

1. CCET Discovery Across Texas Project Electric Power Group Synchrophasor Project Plan and ERCOT Activities Presented to Kent Saathoff, Bill Blevins, John Adams, Prakash Shreshtha - ERCOT Austin, TX August 8, 2012 Presented by: Vikram Budhraja, Prashant Palayam - EPG

2. Synchrophasor Project Deliverables* • A method for establishing and maintaining a reliable synchrophasor network to provide real-time dynamic information on large-scale wind resources and their impact on the transmission grid • The use of synchrophasor measurements to identify precursor conditions to undesirable grid performance and behavior, or to grid interruptions • Defining the value of the demonstration in replicating and transferring lessons learned for wind dynamics monitoring and management to other parts of the U.S. Focus: Visualization, Tools, Analysis * Source: Project Narrative

3. EPG Project Plan • Principal investigator for the Synchrophasor Component of the CCET Project – Electric Power Group (EPG) • Executive Lead – Vikram Budhraja • Project Lead – John Ballance • Key Planned Activities • Establish a Robust Synchrophasor Network • Simon Mo / Frank Carrera • Validate and Manage the Synchrophasor Data • Ken Martin / Prashant Palayam • Perform Analysis and Assessment • Prashant Palayam • Policies/Procedures/Reports • John Ballance • Synchrophasor Team Coordination • John Ballance

4. Establish a Robust Synchrophasor Network • Upgrade ERCOT to RTDMS 2012 • Support ERCOT transition to Production Grade System • Support TO Deployments • Provide RTDMS Training • Develop Generator Model Validation Module • Based on UT Arlington algorithms Focus: Visualization, Tools

5. Network Status & Upgrade Plans Current Status • PMUs installed at 16 substations (21 locations originally planned) • Additions planned at 17 substations • Plan to add Texas Tech – Lubbock project to expand wind-related data collection • ERCOT presently running on RTDMS v5 ERCOT System Upgrade Plans • Migrate to production grade hardware configuration • Configuration options prepared for ERCOT – decision pending • Upgrade to RTDMS 2012 • Installation support TO Upgrade Plans • ONCOR planning RTDMS installation • RTDMS 2012 client installations at TO’s • PMU additions RTDMS Training for Operators – propose ERCOT as training host Review and Update RTDMS Daily Reports

6. Validate and Manage the Synchrophasor Data • Validate and Calibrate PMU measurements • Data communications • Data Synchronization • Network performance – reliability, drop-outs, latency • Develop phasor data performance management process and standards Focus: Validate Data, Improve Data Quality

7. Perform Analysis and Assessments • Perform post-event analysis and forensics on grid events and disturbances • Develop baseline performance measures for wind generation • Perform baseline angle-separation and alarm-limit analyses for the ERCOT grid • Assess the impact of wind generation on system inertial and governor frequency response • Assess low voltage ride through performance of wind generation • Detect, monitor and analyze power system oscillations and the interaction of wind generation • Validate monitored dynamic response with model-based predictions of generator response to disturbances (model validation) Focus: Events, Limits, Baseline Performance

8. Detail on EPG Planned Activities in Support of ERCOT • Analysis and validation of PMU communications network and data – to make data “Production Grade” • Validate data accuracy • Evaluate quality and reliability of phasor data • Assess causes of data loss/data error • Develop phasor data performance standards and monitoring tools • Perform baseline analysis of phasor data to establish alarm limits for RTDMS • Identify normal and extreme operational characteristics • Recommend angle-pair alarm limits for safe operations • Develop recommended mitigation measures to reduce system stress to safe levels • Perform post-event analysis of grid events • Assess the impact of wind generation on system inertial and governor-driven frequency response • Assess low voltage ride through capability of generation (esp. wind generation) • Detect, monitor and analyze power system oscillations and the interactions of wind generation (e.g., 1.8 Hz oscillations in west Texas, 5.5 Hz oscillations near wind generators) • Compare monitored dynamic response with model-based predictions of system performance (model validation) • Evaluate PMU data to determine optimal placement and future monitoring needs

9. Policies/Procedures/Reports • Phasor data repository design and implementation requirements and data archiving policies • Data sharing policies (inside and outside ERCOT) • Phasor data management policies (e.g., PMU naming convention, change management) • PMU location selection principles and criteria • Communications/outreach plan for the Project • Presentations for NASPI, DOE, and industry (e.g., IEEE, ASME) • Produce reports on technical and operational issues learned • Produce final report for the Synchrophasor Component Focus: Knowledge and Technology Transfer

10. Additional Topics for Discussion • Integration with EMS/SCADA • Event Library and Operating Procedures • Operator Training Based on Event Library • Phasor Grid Dynamics Analyzer (PGDA) Training • Applications and Tools • Intermittent Generation Monitor • Voltage Stability Monitor Using Phasor Measurements (no models) • Cyber Security

11. Proposed Team Meeting Schedule • Monthly teleconference calls to coordinate activities • Fourth Tuesday of each month at 1:00-2:00 PM Central Time • August 28, October 23, November 27 • Quarterly in-person one-day meetings • First meeting proposed for late September

12. Action Items / Next Steps • ERCOT to advise when it is ready for RTDMS 2012 upgrade, and EPG to support upgrade • ERCOT to provide EPG access to ERCOT real-time PMU data stream • ERCOT to provide EPG with State Estimator save-files for one historical year as basis for baseline study • EPG to provide RTDMS training and support review and update of RTDMS reports • EPG to closely coordinate analysis and sharing of results with ERCOT • Leverage EPG knowledge from other engagements in support of ERCOT

13. Back-Up Slides • RTDMS Platform Architecture • ERCOT Configuration Options for Production System

14. RTDMS Platform System Architecture

15. ERCOT RTDMS Configuration Options 1 - Minimal Configuration RTDMS Server ePDC DataBase ISG PMU data stream from TO PDCs RTDMS Clients & Other Services

16. ERCOT RTDMS Configuration Options 2 – Redundant Production System RTDMS Server ePDC DataBase ISG PMU data stream from TO PDCs RTDMS Clients & Other Services Failover Clustered Configuration Failover Clustered Configuration Failover Clustered Configuration Load Balance Configuration

17. ERCOT RTDMS Configuration Options 3 - Redundant Production plus Staging/Test Systems RTDMS Server ePDC DataBase ISG PMU data stream from TO PDCs RTDMS Clients & Other Services Failover Clustered Configuration Failover Clustered Configuration Failover Clustered Configuration Load Balance Configuration Data stream from ePDC Staging System Data stream from ePDC Test System

18. ERCOT RTDMS Configuration Options 4 - Fully Redundant Production & Staging plus Test System RTDMS Server ePDC DataBase ISG PMU data stream from TO PDCs RTDMS Clients & Other Services Failover Clustered Configuration Failover Clustered Configuration Failover Clustered Configuration Load Balance Configuration Data stream from ePDC Staging System Test System