Power grid frequency modulation method and system based on cooperation of electrolytic aluminum and polycrystalline silicon

The invention discloses a power grid frequency modulation method and system based on cooperation of electrolytic aluminum and polycrystalline silicon, and belongs to the field of power system dispatching and power grid frequency modulation, and the method comprises the steps: obtaining an active power vacancy from a power grid dispatching part; calculating the adjustable capacity of the active power of the electrolytic aluminum load; calculating the adjustable capacity of the active power of the polycrystalline silicon; drawing a curve graph of the cost of the electrolytic aluminum and the polycrystalline silicon and the adjusted power, calculating a derivative value of the curve when the electrolytic aluminum adjusts one power, calculating a derivative value of the curve when the polycrystalline silicon adjusts complementary power, enabling the derivative values to be equal, and solving the adjusted power required by the electrolytic aluminum and the polycrystalline silicon, so as to make up the active power