Excitation circuit for an asynchronous generator and method for the excitation of an asynchronous generator

摘要

The invention relates to a system for the excitation of an asynchronous generator that can be connected to a turbine for generating electric power, in which the turbine is coupled to the rotor (13) which rotates in a stator (14) of the generator (11). The generation system consists of a direct current / alternating current inverter (16) connected to the rotor (13) of the generator and of an alternating current / direct current rectifier (17), which fixes the voltage in the capacitors (19) of the direct current link for the operation of the inverter. A controller (20) allows applying by means of the inverter a voltage to the rotor of the generator which is obtained by means of an optimization process minimizing the active and reactive power error for the purpose of directly controlling the active and reactive powers of the stator of the generator.