Editorial Department of Power Generation Technology
Doi
Abstract
ObjectivesExisting research on decentralized coordinated control strategies mainly focuses on power distribution within DC microgrid, with limited consideration given to the operation of grid-connected DC microgrids. To address this, a power coordinated control strategy for grid-connected DC microgrids, considering the state of charge (SOC), is proposed.MethodsThe proposed strategy treats the interconnecting converter as a dispatchable resource. It regulates the output power of the energy storage unit and interconnecting converter based on the DC bus voltage while keeping the bus voltage and SOC of the energy storage unit within allowable limits.ResultsThe proposed strategy can achieve decentralized power coordination between the energy storage unit and the interconnecting converter, as well as SOC balancing among energy storage units. It also prevents overvoltage and overcharge/overdischarge conditions for the energy storage units.ConclusionsThe proposed control strategy ensures reasonable power distribution in grid-connected DC microgrids and guarantees the stable operation of the system
