Bidirectional adaptive control strategy for the interconnected converter of AC/DC hybrid microgrids

Le résumé fourni par la source

The operating characteristics of ac frequency and dc voltage contradict with each other due to the coupling effect of interconnected converters(IC), and affect the stability of AC/DC hybrid microgrids under disturbances. In this paper, a bidirectional adaptive control strategy of IC is proposed to realize the optimal operation of the hybrid microgrids. The frequency and dc voltage are normalized, and the imbalance index is proposed to quantify the regulation priority of frequency and dc voltage. A bidirectional adaptive control strategy based on the imbalance index is proposed to realize the optimal control of the AC/DC hybrid microgrids. The simulation model of AC/DC hybrid microgrids is built on PSCAD/EMTDC, and the simulation results show that the proposed strategy can realize adaptive regulation under different priorities of frequency and dc voltage, thus effectively improving the stability of hybrid system.

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