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Corresponding Author

Abou-Tabl, H.

Subject Area

Electrical Engineering

Article Type

Original Study

Abstract

A synchronous compensator is recently used in conjunction with a rigidly impulsed inverter to supply an isolated AC load. In this case the inverter frequency is adjusted to be equal to the load frequency. In order to hold it constant, the feed-back control between the rotor speed and inverter frequency must be investigated. The system consumes its requirements of active power from the inverter through a DC-link which may be connected to an unconventional source of electrical power, Reactive power requirements will be supplied from compensator. In such a system, and after synchronizing the inverter with the DC-link, it is expected to have an oscilating behaviour which may force either the compensator to go out of stability or the inverter to have a failure. The paper is concerned with the formulation of the quasi-steady behaviour of the foregoing through an adequate mathematical model. It will be based on the time varying effective value. The proposed model gives tiree approaches during formulation process of the problem. The computer results show the necessity of the system to be integrated with any conventional type of control.

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