Fresh air conditioner energy-saving control method based on double-layer distributed predictive control

The invention discloses a fresh air conditioner energy-saving control strategy based on double-layer distributed predictive control. The energy-saving strategy mainly comprises the steps that a discrete state space model of regional thermodynamics and CO2 concentration is established for a fresh air conditioner control system, the minimum energy consumption cost under the condition that thermal comfort and indoor air quality are considered at the same time serves as an optimization objective function, and the energy-saving strategy is established according to a human body comfort temperature interval and an ideal CO2 concentration upper limit. The optimization problem is determined by determining system constraint conditions such as the operable range of the air processing unit and the variable air volume box; the optimization problem after relaxation is solved through an accelerated distribution augmentation Lagrangian method in upper layer control, and the ideal area mass flow rate meeting the minimum cost