Vector-controlled Grid Synchronization for the Brushless Doubly-Fed Induction Generator

Abstract

To further demonstrate the applicability of the brushless doubly-fed induction generator to wind turbine applications, a grid synchronization procedure is developed. Vector control of the converter-side stator winding is used to induce a voltage on the grid-side stator winding. A detector is developed to automatically connect the machine to the grid when the voltages are synchronized. Experimental results show that synchronization occurs within 0.4 seconds while the rotor is accelerating.

Literature review on the control of brushless doubly-fed induction machine

“…The Vector control is a widely used strategy for BDFM. The machine's stator and rotor currents as well as torque and speed are controlled according to a mathematical model of the machine [25,1,26]. This control strategy has the advantage of high precision and good performance, but requires a high level of computing power and is more complex to implement than other control strategies (figure 2) [27,28].…”