According to one embodiment, a power plant includes a solar heat collector which collects solar heat and then supplies the solar heat to a heat medium. The power plant includes a heat exchanger which changes a secondary medium into steam by heat exchange with the heat medium. The power plant includes a turbine. The power plant includes a temperature sensor which detects the temperature of the heat medium. The power plant includes and a controller which supplies the heat medium with heat obtained by the conversion of an output variation component having a period shorter than a predetermined value in electricity generated by a wind power generator when the temperature does not satisfy a predetermined condition associated with the driving of the turbine.