Power grid peak-valley period energy optimization device and control method thereof

The invention discloses a power grid peak-valley period energy optimization device and a control method thereof, and belongs to the technical field of thermoelectricity. The method comprises the following steps: acquiring electric energy of a photovoltaic-wind power generation system and a power grid power transmission system; when the power consumption of the power grid is in a valley value, the electric energy of the photovoltaic-wind power generation system and the electric energy which is not absorbed by the power grid power transmission system are utilized to control the temperature control intelligent terminal to electrically heat water in the PTC semiconductor heating pipe so as to heat the water in the heat storage high-temperature water tank, and the water temperature is kept through the phase change material; meanwhile, the other part of water in the heat storage high-temperature water tank stores heat energy through a phase change material and is used when the power utilization peak value of the po