A central air conditioning control system and control method thereof

Abstract

The invention provides a central air-conditioning control system and a control method thereof, and belongs to the technical field of air-conditioning systems. The central air-conditioning control system comprises a universal equipment model library, an equipment performance testing module, a comfort level evaluating module, a genetic algorithm multi-objective optimization control module and an execution module. An actual measured method is used, a system model is established, and the central air-conditioning control system is high in precision and high in reliability and is adaptive; a genetic algorithm is used, multi-objective optimizing can be realized, the optimizing efficiency is high, the comfort level is high, energy is saved, and the cost is low; whether a user feels comfortable or not can be intelligently judged by a user behavior recognition mode, and control objectives are adjusted in time; and the control method can be optimal on the basis of environmental change, particularly at the transition season, the equipment efficiency can be greatly improved, and energy conservation and emission reduction are realized.

Description

technical field [0001] The invention belongs to the technical field of air conditioning systems, in particular to a central air conditioning control system and a control method thereof. Background technique [0002] Central air-conditioning has high energy consumption and poor comfort. On the one hand, the air-conditioning system is complex, involves many physical parameters, and has obvious time lag; on the other hand, there are many equipment manufacturers with different standards, so it is difficult to use theoretical models to establish control models. Traditional air conditioners generally use PID control. Conventional PID control has many imperfections. The most important problem is the tuning of PID controller parameters. Once the tuning is calculated, it is fixed in the entire control process. In practice, due to changes in actual system parameters, it is difficult for the system to achieve control effects. For the central air-conditioning system, it is not only ma...

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Problems solved by technology

[0002] Central air-conditioning has high energy consumption and poor comfort

On the one hand, the air conditioning system is complex, involves many physical parameters, and has obvious time lag; on the other hand, there are many equipment manufacturers and different standards, so it is difficult to establish a control model using a theoretical model

Traditional air conditioners generally use PID control. Conventional PID control has many imperfections. The most important problem is the setting of PID controller parameters. Once the setting is calculated, it is fixed throughout the control process. In practice, due to changes in actual system parameters, it is difficult for the system to achieve the control effect.

For the central air-conditioning system, it is not only manifested in the fact that the control system has strong coupling of multiple inputs and outputs, time-varying parameters, and severe nonlinear characteristics, it is impossible to achieve optimal control based on changes in the external environment, and it is even more difficult to meet the individuality of different users demand

Therefore, it is difficult to obtain a satisfactory control effect by using conventional PID control, and a new control system and method are urgently needed

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