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.