Improved constant parameter VBR model of permanent magnet synchronous machine using resonant auxiliary rotor winding

Wind power generation with permanent magnet synchronous machines (PMs) has been made possible using power electronic converters. With the increasing use of such systems, the numerically efficient modeling and simulation are of critical importance. As an alternative to traditional qd models, the coupled-circuit phase-domain (CCPD) and voltage-behind-reactance (VBR) models have been recently proposed to achieve advantageous numerical properties. Constant parameter VBR (CPVBR) models has also been presented to avoid having the variable inductance matrix that is present in CCPD and VBR models in case of salient rotor machines. This paper improves the CPVBR model using the auxiliary rotor winding to achieve better accuracy when the machine in connected to power electronic converters. The new model is shown to possess very good accuracy and advantages over alternative existing models.