Abstract
The paper presents the results of research aimed at identifying the asynchronous mode of excited syn-chronous electric motors and their safety and stability. It is proposed to identify the asynchronous mode using a power polynomial from the ratio of the degrees of active and reactive power, determined from measured instantaneous values of currents and stator voltages of a synchronous electric motor. It is proposed to control the excitation system of a synchro-nous motor by cyclically switching the excitation winding to an additional resistance or an exciter based on a criterion rep-resenting the derivative of the power polynomial from the ratio of the active and reactive powers of the synchronous mo-tor. The proposed methods for detecting the asynchronous mode of excited synchronous motors and controlling the excitation system to ensure successful resynchronization of a synchronous motor without unloading the driven unit can be used in microprocessor-based protection devices for synchronous electric motors. The effectiveness of the proposed methods is confirmed through mathematical modeling.
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Schedule a callMore From: Bulletin of the South Ural State University series "Power Engineering"
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