MOD-025 Verification and Data Reporting of Generator Real and Reactive Power Capability and Synchronous Condenser Reactive Power Capability

GERS USA | Tuesday, March 2, 2021

The North American Electric Reliability Council (NERC) has approved several standards with the purpose of:

• Ensuring that generators will not trip off-line during specified voltage and frequency excursions or as a result of improper coordination between generator protective relays and generator voltage regulator controls and limit functions
• Ensuring that generator models accurately reflect the generator’s capabilities and operating characteristics.

These standards require the periodic verification of model accuracy through testing, analysis, and data reporting.

The MOD-025-2 standard addresses the verification of generator real and reactive power capability and synchronous condenser reactive power capability. The standard applies to all generating units and synchronous condensers greater than 20 MVA and generation plants greater than 75 MVA.

Our consultants have experience in modeling, analysis, model verification, and staged testing for more than 19.7 GW of conventional and renewable generating plants. Our Engineer’s know-how, acquired through a large number of projects allow us to perform testing with the highest efficiency.

• Prior to testing:
  • Analysis of facilities documentation, expected capability, normal operating limits, voltage and frequency relay settings.
  • Elaboration of the detailed staged test
• On site:
  • Final review of the detailed procedure with operators
  • Connect data recording equipment if required
  • Conduct test following TO/RTO indications
• After the testing:
  • Data analysis
  • Elaboration of the final report

The MOD-025 stage test is usually conducted in conjunction with MOD-026 (Verification of Models and Data for Generator Excitation Control System or Plant Volt/Var Control Functions) and MOD-027 (Verification of Models and Data for Turbine/Governor and Load Control or Active Power/Frequency Control Functions).

Any questions about MOD-025? Our engineers are happy to answer any questions you might have! Contact us at [email protected].