Patent ID: 6762592
Filing Date: 2004-07-13
Classification: H02P

Abstract:
An excitation controller for a synchronous machine comprising:a voltage detector for detecting an output terminal voltage of a synchronous machine connected to a transmission system through a transformer; a current detector for detecting current output by the synchronous machine; modular HSVC (High Side Voltage Control) apparatus receiving the terminal voltage detected and the current detected, calculating reactive power produced by the synchronous machine based on the terminal voltage detected and the current detected, calculating a reactive current from the terminal voltage detected and the reactive power calculated, calculating a high side voltage from the reactive current calculated and reactance of the transformer, and outputting a correction signal based on deviation between the high side voltage calculated and a reference voltage; an automatic voltage regulator receiving the correction signal, including a voltage setter, and outputting a command based on adding the correction signal to a voltage setting value provided by said voltage setter; and an exciter for field control of the synchronous machine based on the command issued from said automatic voltage regulator.