A Novel Energy Management Technique for DC Microgrids in Telecom Applications

This paper presented a novel droop control technique for energy storage systems for the telecommunication backup systems In islanded DC MG. In the islanded mode of operation, reliability and stability of backup systems, tightly regulating the bus voltage, and management of energy in specific operating conditions(e.g. full Load, Light Load, etc) are the very challenging discussions. The proposed control technique defined a new nonlinear droop function, providing a tightly regulation of the bus voltage during various uncontrollable changes in loads/sources within the islanded MG. In addition, the nonlinear profile is adaptive based on the system parameters such as the state of charge (SOC) of the battery and DC MG voltage. Simulation and experimental results verify the feasibility of the proposed approach and demonstrate its superior performance in comparison with conventional controllers.