Automatic Detection Method and Apparatus for Rotor Initial Position Angle of Double-Fed Machine

摘要

An automatic detection method and apparatus for a rotor initial position angle of a double-fed machine (2). The method comprises the following steps: giving a reference voltage angle θ_given, and combining with a given reference voltage amplitude V_ref to generate a reference voltage vector; converting the reference voltage vector into a driving signal by space vector width modulation SVPWM to drive a rotor side PWM converter (5) to generate an alternating current voltage signal and apply it to a rotor winding of the double-fed machine (2); obtaining a rotor mechanical angle n*θ_rotor of the double-fed machine (2); obtaining a stator voltage vector angle θ₁; and subtracting the rotor mechanical angle n*θ_rotor and the given reference voltage angle θ_given from the stator voltage vector angle θ₁ to obtain the rotor initial position angle θ_initial; wherein n is the number of pole pairs of the double-fed machine (2). The automatic detection for the rotor initial position angle of the double-fed machine (2) can be realized through adopting the method and apparatus.