Variable parameter intelligent proportion integration differentiation (PID) linkage control method for multiple air conditioners

Abstract

The invention discloses a variable parameter intelligent proportion integration differentiation (PID) linkage control method for multiple air conditioners. The method comprises the following steps of: performing weighted average calculation according to the detected data of each sensor in each area, thus acquiring a temperature error and a humidity error in each area, and adjusting a PID parameter in real time by using the deviation relation of the PID parameter and a set value so as to adjust the operation parameters of an air conditioning system around the area in a linkage mode, achieve the best combination of an output variable and deviation and ensure that a system working condition is closest to the set value. By the method, a hot and cold opposite working condition caused by local load fluctuation in the traditional large-space air conditioning system is eliminated, and the requirements of large space, high precision, constant temperature and constant humidity are met.

Description

technical field [0001] The invention belongs to the technical field of automation control, and in particular relates to a control method for variable parameter intelligent PID linkage control of multiple air conditioners, especially a control method for high energy saving, high stability, constant temperature and humidity, and high precision for large-space factory buildings . Background technique [0002] Traditional large spaces generally use an air-conditioning system. When the local load fluctuates greatly, the air-conditioning system cannot adjust to the local load change, resulting in local air parameters that do not meet the process requirements, and even some areas may be cooling down, while the adjacent The area may need to be heated due to the influence of cold air next to it or the difference in equipment load distribution, resulting in an opposing working condition. Moreover, the control of the current air-conditioning system is generally based on conventional P...

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Problems solved by technology

[0002] Traditional large spaces generally use an air-conditioning system. When the local load fluctuates greatly, the air-conditioning system cannot adjust to the local load change, resulting in local air parameters that do not meet the process requirements, and even some areas may be cooling down, while the adjacent The area may need to be heated due to the influence of cold air next to it or the difference in equipment load distribution, resulting in an opposing working condition

Moreover, the control of the current air-conditioning system is generally based on conventional PID control. When the feedback value of the controlled variable is too large in this control method, it will cause too much input of the control amount, resulting in system overshoot or even divergence. Therefore, in the control In a dynamic and long-delay system, conventional PID adjustment has certain disadvantages

In some spaces, such as the packing workshop of a cigarette factory, the load distribution changes with time and space, and there is a certain delay in reflecting the change of local load at the air measuring point, which belongs to a dynamic and long-delay system. If according to the conventional PID Adjustment will make the indoor temperature and humidity unable to meet the production requirements, resulting in production loss

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