1997-06-18

Rationale Behind In-Process Changes to Constant and Variable Frequency Power Quality Standards 971245

Several concurrent trends are forcing a reevaluation of the electrical power quality which is most practically and suitably delivered to aircraft electrical utilization equipment. Military applications have focused on 270 Vdc and the system integration issues of more-electric aircraft. Most civil applications are yet to become very much “more-electric”, though their increasing capacity and electronic load content has invalidated many of the assumptions upon which traditional power quality documents were based. This paper discusses the development of new guidelines for a variety of interface parameters essential to safe, effective application of both constant and variable frequency ac electric power.

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