Cold storage temperature optimization control method and system of chilled water storage air conditioning system

The invention relates to a cold storage temperature optimization control system and method for a chilled water storage air conditioning system, and the system comprises a refrigerating unit, a cold storage tank, a chilled water return pipe, a chilled water supply pipe, a chilled water pump, a cold storage pump, a cold discharge pump, a cooling capacity meter and a controller, the cooling capacity meter accumulatively measures the used cooling capacity of the system, and the controller is used for determining the current all-day cooling capacity Qreal; the predicted cold supply capacity Qnext day is assigned, the predicted cold supply capacity Qnext day is compared with the theoretical maximum cold storage capacity Qmax of the cold storage tank, and the optimal cold storage temperature tset of the cold storage tank is determined; the controller is further used for controlling the system to enter a cold storage mode operation state or a stop state according to the optimal cold storage temperature tset. Accordin