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This letter proposes a new scheme of smooth operation transition for the stand-alone power system which is composed of engine generator and battery energy storage system (BESS) with photo voltaic panels. The proposed scheme offers smooth operation transition of BESS controller from the current control to the voltage control and vice versa. The feasibility of proposed scheme was verified through experiments...
This paper describes a bipolar DC distribution system with a new half-bridge voltage balancer which can adjust the unequal voltage between the positive and the negative poles. The half-bridge voltage balancer has two cascaded voltage and current controls for adjusting the terminal voltage unbalance due to the unequal load size. The operation of typical bipolar DC distribution system, which consists...
This paper describes operational analysis of the bipolar DC distribution system coupled with distributed generators. The energy management and operational principle of distributed generator and energy storages were first analyzed by computer simulations. After then a hardware simulator for the bipolar DC distribution system was built and various experiments were carried out. The developed simulator...
This paper introduces a new operation method with coordinated droop control for stand-alone DC micro-grid. The proposed coordinated droop control can offer improvement of system reliability and efficiency for the stand-alone DC micro-grid, which is composed of DGs(distributed generations) and battery with SOC(state of charge) management system. The operation of stand-alone DC micro-grid with proposed...
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