EPRI has undertaken a number of case studies to evaluate solutions to the most important power quality concern of the 1990s—equipment sensitivity to voltage sags. Focusing on power-conditioning equipment, the studies have demonstrated the effective use of various technologies—constant-voltage transformers, magnetic synthesizers, motor-generator sets, and superconducting magnetic energy storage—to provide ride-through support for critical loads. In addition, researchers have looked at the role that equipment procurement specifications can play in helping to protect sensitive equipment against voltage sags.
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