Average value model of grid side converter in PMSG for system‐level studies

Abstract

In recent years, the subsynchronous oscillation phenomena have been observed in the permanent magnet synchronous generator (PMSG) based wind farms. Therefore, to design an accurate and efficient model for PMSG wind generator becomes an important issue for related stability studies. In this study, an average value model (AVM) for the grid side converter of PMSG is proposed, which can be easily implemented in traditional electromagnetic transients simulation programme. The proposed AVM model consists of an optional DC–DC boost converter, a crowbar protection circuit, and a DC–AC voltage source inverter. Numerical tests are performed for both the AVM and the detailed PMSG model on PSCAD with different scenarios, including both the slow transients studies and fast transient fault analysis. Simulation results of the proposed average value model show good consistency with those of the detailed PMSG model while providing significant speedups. Such characteristics indicate that the proposed model is accurate and efficient for system-level dynamic research.