Heat supply method for supplying power to geothermal film in residential building by utilizing photovoltaic power

The invention provides a heat supply method for supplying power to a geothermal film of a residential building by utilizing photovoltaic, which comprises the following steps of: modularly installing a photovoltaic device and a DC-DC converter on the roof of the residential building, and calculating photovoltaic power generation power according to solar irradiation intensity; a geothermal film is installed in a residential building, a heat supply system model is constructed by considering the characteristics of the residential building, direct current generated by photovoltaic power is independently supplied to geothermal film heating equipment after voltage class conversion through a DC-DC converter, and the heating power of the geothermal film in the residential building is calculated; a heat storage device is used for storing residual heat, a heat storage model considering heat storage capacity constraint is constructed, a heat storage tank is used as the heat storage device, and photovoltaic independent di