Patent ID: 7485980
Filing Date: 2009-02-03
Classification: H02P,Y02E

Abstract:
1. A generator in which a stator side of a doubly-fed generator is connected to a power system and an excitation power converter is connected to secondary windings of said doubly-fed generator to adjust generation of a power to be output from said doubly-fed generator to said power system, wherein: said excitation power converter is connected to the secondary windings of said doubly-fed generator via a first impedance; a diode rectifier is connected in parallel to the second windings of said doubly-fed generator via a second impedance; and a DC link of said diode rectifier is connected in parallel to a DC link of said excitation power converter, wherein the generator comprises a controller for outputting an on-command to a power semiconductor switching element of said excitation power converter if a value of current flowing in the power semiconductor switching element is a predetermined value or larger.