A method for controlling an electric coupler for coupling an a.c. power supply with an asynchronous generator or the motor and the coupler

摘要

A method for controlling an electric coupler between a multiphase a.c. power supply (17) and a multiphase asynchronous generator (5) in a windmill, wherein said coupler is at least one controllable coupler unit with antiparallel connected, electrically controllable line-commutated semiconductor devices, such as thyristors, tilts periods or parallel connected thyristors or tilts periods are connected in parallel, between each of the line phases (r, s, t) and the phases of the multiphase asynchronous generator (5) comprises, in which a phase shifter circuit with a measuring circuit (4) for measuring the phase difference in each phase between the resulting mains current and of the mains voltage and a capacitor bank (15) for capacitive compensation for the purpose of minimizing the reactive power, controlled by the measuring circuit (4), an electronic circuit (2) for measuring and phases section controlled adjustment of the coupling degree of the coupler units (1) of the coupler between the network (17) and the multiphase asynchronous generator (5) and a device (10) for measuring the number of revolutions of the generator (5) and to their transmission to the electronic circuit (2) are provided,the degree of coupling..