Power Systems
Power Systems
07 / 28 / 2026
Overcurrent relay coordination testing for modern distribution feeders
This piece explains how overcurrent protection coordination is set, checked, and tested on distribution feeders where local generation alters fault current magnitude and direction.
Power Systems
07 / 25 / 2026
Why distance protection relays mis-reach under real fault conditions
This piece explains why distance protection relays mis-reach under fault resistance, source infeed, capacitive voltage transformer transients, and heavy transfer, and how simulation-based testing checks zone reach before energization.
Power Systems
07 / 23 / 2026
Automating grid code compliance testing for inverter-based plants
Grid code compliance testing for inverter plants depends on weak grid studies, fixed disturbance definitions, repeatable scripted sequences, and structured pass/fail evidence.
Power Systems
07 / 21 / 2026
Low voltage ride through testing for grid connected inverters
A practical guide to LVRT test methods, voltage sag profile fidelity, protection checks, and pre-connection verification for grid-connected inverters.
Power Systems
07 / 18 / 2026
Shipboard and marine power systems tested in a closed loop
This guide explains how closed-loop, real-time simulation is used to validate marine power system controls, protection timing, and fault response before sea trials.
Power Systems
07 / 14 / 2026
Testing wide area protection and control schemes in real time
This page explains how engineers test wide area protection, wide area monitoring, and synchrophasor control schemes with timing budgets, latency checks, and closed-loop validation.
Power Systems
07 / 10 / 2026
Process bus and sampled values testing for digital substations
Process bus testing, sampled values validation, and merging unit checks are examined through timing, mapping, and relay response tested as one synchronized system.
Power Systems
07 / 09 / 2026
What substation automation testing misses without a real-time model
Guidance on testing a substation automation system focuses on scenario based, time-aligned, closed-loop validation before commissioning.
Power Systems
07 / 08 / 2026
How current transformer saturation distorts differential protection testing
A practical review of current transformer saturation, its effect on bus differential protection, and how to test relays with feeder-specific saturated waveforms.
Power Systems
07 / 06 / 2026
Validating out of step protection with real-time fault simulation
Engineers use closed-loop simulation to validate out-of-step protection and power swing protection, from relay logic and settings to stable and unstable swing tests.