Constant parameter VBR model of permanent magnet synchronous machine wind generation system

Modeling renewable energy generation systems with electrical machines has been an active area of research, wherein interfacing the machine models with power electronic converters is a known challenge area. As an alternative to traditional qd models, the coupled-circuit phase-domain (CCPD) and voltage-behind-reactance (VBR) models have been recently proposed. The permanent magnet (PM) generator has internal saliency and damper structures, which results rotor-position-dependent inductances in both CCPD and VBR models, and interfacing qd models requires snubber circuits, all of which reduces the simulation efficiency. This paper presents a constant-parameter voltage behind reactance (CPVBR) model in order to achieve a numerically-efficient interface with the rectifier circuit. The model is demonstrated on a grid-connected variable-speed wind generation system, wherein significant computational advantages are demonstrated compared with existing models.