How can the flow of power be controlled?

Article Abstract:

Several devices can be used to reroute electric power flow along transmission lines with the most capacity and to minimize voltage drop. These include shunt capacitors, series capacitors, load tap-changer transformers, phase-angle shifting transformers and static VAr compensators.

Cover Story

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Monitor predicts flashover of contaminated insulators

Article Abstract:

Atmospheric Physics Inc. and Florida Power and Light Co. have designed an insulator-contamination indicator system. The system monitors seven parameters to be able to predict when flashover due to contamination is imminent.

Electric insulators, Electrical insulators

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Why electromagnetic VTs are still best for revenue metering, relaying

Article Abstract:

Electromagnetic voltage transformers (VTs) which have been used for revenue metering and relaying since the 1920s remain unopposed even in the 1990s. The accuracy of wound-type VTs are the same even after years of service.

Evaluation, Transformers, Electric transformers

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