The high-power density and capability of three-port converters (TPCs) in generating\ndemanded power synchronously using flexible control strategy make them potential candidates for\nrenewable energy applications to enhance efficiency and power density. The control performance of\nisolated TPCs can be degraded due to the coupling and interaction of power transmission among\ndifferent ports, variations of model parameters caused by the changes of the operation point and\nresonant peak of LC circuit. To address these issues, a linear active disturbance rejection control\n(LADRC) system is developed in this paper for controlling the utilized TPC. A virtual damping based\nmethod is proposed to increase damping ratio of current control subsystem of TPC which is beneficial\nin further improving dynamic control performance. The simulation and experimental results show\nthat compared to the traditional frequency control strategy, the control performance of isolated TPC\ncan be improved by using the proposed method.
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