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The paper considers a method for protecting a direct current exciter from remagnetization in transient modes. A schematic diagram of the synchronous generator excitation system with an exciter protection device and a description of its operation are given. The proposed technical solution eliminates the violation of the excitation mode and provides high reliability of uninterrupted operation of synchronous generators of small hydroelectric power stations (HPS) by eliminating the possibility of damage to the device that protects the exciter from demagnetization and remagnetization.

Methods and Technologies for Ensuring the Reliability of Excitation of Synchronous Generators of Small Hydroelectric Power Stations in Uzbekistan