Power grid voltage fuzzy control method for energy storage coordination control device

The invention provides a power grid voltage fuzzy control method for an energy storage coordination control device. The power grid voltage fuzzy control method comprises the following steps that the energy storage coordination control device acquires a power grid real-time voltage value U; calculation is performed to obtain a power grid voltage deviation e and a voltage deviation change rate deltae as input quantities, a fuzzy set is divided according to the input quantities and then fuzzy reasoning is carried out to obtain PI control parameters Kp and Ki as output quantities; a reactive output reference value Qref is calculated through the PI control parameters Kp and Ki obtained in the step 2, and battery energy storage is controlled; and after a reactive power output reference value Qref is obtained, output reactive power Q is obtained according to the boundary condition of the maximum capacitive or inductive reactive power output size of the energy storage system. Compared with the prior art, the change o