CERTS Microgrid Laboratory Test Bed

TLDR

The CERTS Microgrid concept demonstrates how distributed generation can be managed as a subsystem that can operate in parallel with the grid or island to provide uninterruptible power and disconnect during faults or poor power quality. The concept was demonstrated at a full‑scale test bed near Columbus, OH, operated by American Electric Power. Full‑scale testing confirmed earlier simulations, showing that islanding and resynchronization met IEEE 1547 and power‑quality standards, the protection system distinguished normal from faulted operation, and the controls remained robust under all tested conditions.

Abstract

The CERTS Microgrid concept captures the emerging potential of distributed generation using a system approach. CERTS views generation and associated loads as a subsystem or a "microgrid." The sources can operate in parallel to the grid or can operate in island, providing uninterruptible power-supply services. The system can disconnect from the utility during large events (i.e., faults, voltage collapses), but may also intentionally disconnect when the quality of power from the grid falls below certain standards. CERTS Microgrid concepts were demonstrated at a full-scale test bed built near Columbus, OH, and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations, then through laboratory emulations, and finally through factory acceptance testing of individual microgrid components. The islanding and resynchronization method met all Institute of Electrical and Electronics Engineers Standard 1547 and power-quality requirements. The electrical protection system was able to distinguish between normal and faulted operation. The controls were found to be robust under all conditions, including difficult motor starts and high impedance faults.