Electric Power Control Research Articles

Electrical features of the four corners pipe line

THIS PAPER discusses generally the electric power distribution systems, control schemes, supervisory control, telemetering, and communication means employed on a crude-oil pipe line constructed by The Shell Pipe Line Corporation.

Analysis of Electric Power Control System with Digital Differential Analyzer

Analysis of Electric Power Control System with Digital Differential Analyzer

A device for the automatic control of electrical power up to 2 kW

The device comprises a closed-loop control system in which a voltage proportional to the consumed power is continuously compared with a voltage representing the desired power consumption; the difference between the two voltages then actuates a servo-motor, which rotates the brush arm of an auto-transformer so as to minimize the deviation between the desired and actual power values. The system is not linear, but by varying the stabilizing feed-back according to the position of the brush-arm of the auto-transformer, an almost uniform transient response is obtained over the whole working range. Control of power from 50 to 2 000 W to an accuracy of ± ¼% has been achieved.

The Evolution of Federal Control of Electric Power

The Evolution of Federal Control of Electric Power