Fault‐tolerant control strategy of open‐winding brushless doubly fed wind power generator based on direct power control

Abstract

This study presents a study of fault-tolerant operation for a brushless doubly fed reluctance generator (BDFRG) system under a converter switch fault. The topology of the dual converter fed open-winding BDFRG is adopted to improve post-fault operation capacity. For post-fault operation, the appropriate voltage vectors of control winding are selected to directly adjust the active and reactive power of power winding based on the direct power control theory. Switching tables are formulated under different switch faults. The simulation and experimental results demonstrate the feasibility of the proposed strategy.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Research on Control Strategy of Grid-connected Brushless Doubly-fed Wind Power System Based on Virtual Synchronous Generator Control

“…The direct power control based on model prediction has good response speed, fixed switching frequency and does not require PI regulator [12]. In order to make the control mode more flexible, some scholars have studied the control strategy based on open winding [13], and further developed the fault-tolerant control strategy [14]. And the control strategy of BDFRG under unbalanced grid voltage is proposed in [15], [16].…”