CCET Discovery Across Texas Project Electric Power Group

Synchrophasor Project Plan and ERCOT Activities

Presented toKent Saathoff, Bill Blevins, John Adams, Prakash Shreshtha - ERCOT

Austin, TXAugust 8, 2012

Presented by:Vikram Budhraja, Prashant Palayam - EPG

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.

* Source: Project Narrative

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Focus: Visualization, Tools, Analysis

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

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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

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Focus: Visualization, Tools

Network Status & Upgrade PlansCurrent StatusPMUs installed at 16 substations (21 locations originally planned)

― Additions planned at 17 substationsPlan to add Texas Tech – Lubbock project to expand wind-related data collectionERCOT presently running on RTDMS v5

ERCOT System Upgrade PlansMigrate to production grade hardware configuration

– Configuration options prepared for ERCOT – decision pendingUpgrade to RTDMS 2012

– Installation support

TO Upgrade PlansONCOR planning RTDMS installationRTDMS 2012 client installations at TO’sPMU additionsRTDMS Training for Operators – propose ERCOT as training hostReview and Update RTDMS Daily Reports

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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

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Focus: Validate Data, Improve Data Quality

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)

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Focus: Events, Limits, Baseline Performance

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

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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

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Focus: Knowledge and Technology Transfer

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

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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

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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

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Back-Up Slides

RTDMS Platform Architecture ERCOT Configuration Options for Production System

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RTDMS Platform System Architecture

Page 14

ERCOT RTDMS Configuration Options 1 - Minimal Configuration

ePDC RTDMS Server

DataBase ISG

PMU data stream from TO PDCs

RTDMS Clients

&Other

Services

ERCOT RTDMS Configuration Options 2 – Redundant Production System

PMU data stream from TO PDCs

Failover Clustered

Configuration

ePDC RTDMSServer

DataBase

Failover Clustered

Configuration

Failover Clustered

Configuration

ISG

Load Balance Configuration

RTDMS Clients

&Other

Services

ERCOT RTDMS Configuration Options 3 - Redundant Production plus Staging/Test Systems

PMU data stream from TO PDCs

Failover Clustered Configuration

ePDC RTDMSServer

DataBase

Failover Clustered Configuration

Failover Clustered Configuration

ISG

Load Balance Configuration

Test System

Staging SystemData stream from ePDC

Data stream from ePDC

RTDMS Clients&

Other Services

ERCOT RTDMS Configuration Options 4 - Fully Redundant Production & Staging plus Test System

PMU data stream from TO PDCs

Failover Clustered Configuration

ePDC RTDMSServer

DataBase

Failover Clustered Configuration

Failover Clustered Configuration

ISG

Load Balance Configuration

Test System

Staging System

RTDMS Clients&

Other Services

Data stream from ePDC