Design of double-power supply system based on buildings´ photovoltaic facades

With the constant development of the building integrated photovoltaic distributed grid-connected generation system, the utilization ratio of photovoltaic facades in city´s photovoltaic generation system has gradually become the focus of people´s attention. To reduce energy loss in the process of increasing and inverting low voltage DC into high voltage AC as well as dropping into low voltage for low voltage DC equipment, a double-power supply system is designed, which aims at low voltage DC equipment based on buildings´ photovoltaic facades. The power controller based on msp microcomputers, system´s Maximum power tracker and photovoltaic grid-connected power module are designed. In the double-power supply system, power controller can monitor power and control energy allocation, which reduces power loss during grid-connected, and improves the utilization ratio of photovoltaic electric energy in photovoltaic facades.