Variable-speed power generating system.

摘要

A variable-speed power generating system comprises a variable-speed generator (5) electrically connected at its primary winding to an electric power system (1) and at its secondary winding to the electric power system through a frequency converter (9) and mechanically coupled to a driver (6) driving the secondary side thereof, a phase detector (8) generating an output signal representing a slip frequency in response to the application of a first input having a frequency component of an output generated from the primary winding of the variable-speed generator and a second input having a frequency component corresponding to the rotation speed of the driver, a controller (10) controlling the frequency onverter on the basis of a reference phase provided by the output signal of the phase detector, and regulating means (15, 16;) for controlling the frequency converter so that, when the variable-speed generator is disconnected from the electric power system, the frequency applied to the secondary winding of the variable-speed generator may not deviate from a predetermined allowable range of variable frequency operation of the frequency converter.