STATIC EXCITER OF AN ELECTRIC GENERATOR, METHOD FOR RETROFITTING, AND METHOD FOR OPERATING

摘要

The static exciter (1) of an electric generator (2) has a main transformer (8) with a high voltage side connected to the grid (5) and a low voltage side connected to a field circuit converter (9) that feeds a generator field circuit (3). The static exciter (1) includes a control unit (11) arranged to detect the status of the grid (5) to cause at least a capacitor bank (13) to supply energy to said generator field circuit (3) in case the voltage of the grid (5) falls below a prefixed voltage value. The capacitor bank (13) is connected between the low voltage side of the main transformer (8) and the AC side of the field circuit converter (9).