Study on BDFG control strategy with unbalanced loads

When wave power system using BDFG operated in islanded mode, the unbalanced loads condition should be taken into consideration in the control system, otherwise it will cause active, reactive power and electromagnetic torque fluctuations because of civil electricity. In this paper, the model of BDFG with unbalanced loads is deduced based on symmetrical component theory, the impact of negative sequence voltage on the BDFG vector control theory based on PI regulator is analyzed. And then current control strategy based on IM regulator of BDFG is presented. Theoretical analysis and simulation results show that introdduced theory and control strategy is correct and effective.