SynchroGrid provided Wide Area Coordination services for Cross Texas Transmission (CTT), ensuring that their system was well-coordinated and prepared to meet Requirement 2 of PRC-027-1. Our combination of system protection and software development expertise uniquely positions us to provide both innovative and automated solutions for both requirements 1 and 2 of PRC-027-1.

Our exclusive process for Wide Area Coordination analysis included auditing the sensitivity, selectivity, and security of the protective relays’ performance using automation techniques. We performed scans of the entire transmission system to uncover high risk areas for blackouts, mis-coordinated relays, relays that operate out of order or out of zone, incorrect relay settings, and more. Our rigorous scanning techniques allowed us to perform deeper analysis of the entire system in a highly efficient manner, enabling us to ensure reliable protection operation and prevent mis-operations and cascading blackouts.

A summary of our unique process is as follows:

  1. Short circuit model verification. SynchroGrid verified that all information to be used in CTT’s short circuit model was reliable and accurate prior to analysis. This included verifying the topology, impedances, transformer configuration, relay settings, and line ratings.
  2. Coordination criteria development. SynchroGrid collaborated with CTT to establish coordination criteria. These criteria included minimum and maximum thresholds for phase and ground Zone 1, Zone 2, Zone 3, and Zone 4 distance elements. SynchroGrid also defined coordination criteria for the phase and ground time and instantaneous overcurrent elements.
  3. Violation criteria development. SynchroGrid established violation criteria to determine which relay operation violations had the most effect in the system. The criteria included out of order violations, out of zone violations, and CTI violations.
  4. Violation resolution. SynchroGrid took the necessary steps to address and resolve all violations.
  5. Report generation. SynchroGrid generated a comprehensive report of all coordination activities.

CTT's system is now well-coordinated and set to comply with the PRC-027-1 R2 requirements for the next six years.

Looking for solutions for PRC-027-1? Contact us by emailing or calling 713-471-3429.

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