CONTROL OF A DOUBLY-FED INDUCTION GENERATOR

摘要

A controller for a doubly-fed induction generator, the doubly-fed induction generator comprising a stator and a rotor. The stator comprises stator terminals arranged to provide a three phase stator terminal voltage, and a three phase winding arranged to provide a stator flux described by a vector rotating at a stator frequency. The stator provides a stator electrical power supply at the stator frequency. The rotor comprises a three phase winding arranged to provide a rotor flux described by a vector rotating at substantially the stator frequency at an angular position relative to the stator flux vector. The controller is arranged to determine a control signal to cause a change substantially only in the magnitude of the rotor flux vector in response to a stator terminal voltage error signal. The controller is further arranged to determine a control signal to cause a change substantially only in the angular position of the rotor flux vector relative to the stator flux vector, in response to a stator electrical power supply error signal.