EPG Projects

Data Quality Analysis

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In order to achieve a production quality phasor monitoring system that can be relied upon in real-time operations, three conditions must be met:

  1. The data must be flowing reliably from the PMU to the operator's console.
  2. The data must be valid.
  3. The data must be monitoring the critical locations (right places).

The data quality analysis project addressed the first condition of reliable data from PMU to the operator's console. This project was carried out for Electric Reliability Council of Texas (ERCOT) as a part of the CCET Discovery Across Texas Project Funded by DOE.


The study identified 7 different previously unknown data quality issues in different parts of the synchrophasor network.


The project provided the following benefits:

  • Validated the data quality and data flow
  • Fixed leaks in pipes (Data Dropouts)
  • Fixed data availability issues
  • Validated data storage on received data samples
  • Checked for missing samples - Received Vs. Reported
  • Verified data time alignment between databases
  • Verified data accuracy and sufficient resolution between databases
  • Verified signal name consistency between databases

About EPG

Electric Power Group, LLC (EPG) has been pioneering the development and deployment of synchro-phasor technologies since 2000. Our principals have extensive experience in running and managing utility grids, investigating root causes of major blackouts (WECC 1996, EI 2003), and leveraging this deep domain knowledge to develop industry leading synchrophasor technology applications for wide area real time monitoring, visualization and situational awareness.

The EPG team has extensive hands-on experience with synchrophasor standards, networks, system architecture, deployments and performance analysis through work at EPG for leading ISO's and utilities including PJM, NYISO, ERCOT, CAISO, MISO, BPA, TVA, SCE, AEP, LADWP, SRP, Duke, Dominion, NYPA and other companies.