Design and development of dc-distributed system with grid connection for residential applications

This paper presents design and development of a dc-distributed system with grid connection for residential applications. The system configuration is first described, including green power generator, energy storage element, dc appliance & equipment, and monitor & control center. For realizing the system, the kernel modules of bi-directional inverter, bi-directional charger/discharger, MPPT and dc appliance have been developed, and they are also introduced in this paper. A virtual house has been built in the CCU campus to demonstrate the system operation, from which test data and the critical issues being worth further study are presented.