Cooperative Compensation Strategy Based on Dual Power Converters for Standalone BDFIGs with Heavy Load Disturbance

The traditional control strategies for brushless doubly-fed induction generator (BDFIG) operating in standalone mode are without satisfactory dynamic performance under heavy load disturbance. This paper proposes a new dual-converter cooperative compensation strategy, which adopts the machine-side converter (MSC) and the load-side converter (LSC) to compensate for the changes in the power winding (PW) active and reactive currents, respectively. As a result, the dual-converter cooperative compensation strategy can make full use of the redundant capacity of MSC and LSC to compensate for the load disturbance. The proposed strategy is verified on the 3-kVA BDFIG experimental platform with heavy load disturbance at typical operation speeds.