Patent ID: 8664788
Filing Date: 2014-03-04
Classification: F03D,F05B,H02J,Y02E

Abstract:
1. A method of dissipating energy in a direct current (dc) bus of a doubly-fed induction generator (DFIG) converter during a grid event, said method comprising: monitoring, by a controller, operating conditions of an electrical system, said electrical system comprising at least a DFIG generator and a line side converter and a rotor side converter connected by a dc bus having a dynamic brake connected thereto; detecting, by the controller, an overvoltage on the dc bus or a condition indicative of an overvoltage on the dc link is detected, said overvoltage on the dc bus or condition indicative of the overvoltage caused by a grid event; and causing, by the controller, energy in the dc link to be dissipated using the dynamic brake.