Self-tuning PID energy-saving temperature control method and module

Abstract

The invention relates to a self-tuning PID energy-saving temperature control method. The method comprises the steps that a target temperature value, a control period, a sampling period and a thresholdtemperature difference are set first; load heating power is increased; the current regional temperature sampling value of a controlled object is acquired, and the sampling period is combined to calculate the temperature rise rate; a PSO-DE algorithm combining particle swarm optimization (PSO) and differential evolution (DE) is used to adjust and calculate PID control parameters; the duty cycle ofthe output pulse of a control period is adjusted according to the operation result; heating power output is adjusted, so that the sampled temperature sampling value is approximately equal to the actual temperature value of the controlled object; a temperature error caused by the heating inertia is reduced; heating power is accurately controlled; and the energy saving effect is obvious. A self-tuning PID energy-saving temperature control module comprises the self-tuning PID energy-saving temperature control method, can accurately control the heating power, and has an obvious energy-saving effect.

Description

technical field [0001] The invention relates to the field of energy-saving temperature control, in particular to a self-tuning PID energy-saving temperature control method and a module. Background technique [0002] With the rapid development of social economy, the energy consumption of modern industry increases continuously with the expansion of production scale, among which heating energy consumption accounts for a large proportion of industrial load energy consumption. In order to achieve the development goal of energy saving and consumption reduction, at the same time To improve the level of heating technology, the requirements for temperature control accuracy and energy saving of heating loads are getting higher and higher. [0003] In modern industrial production, the PID algorithm with the advantages of simple structure, easy implementation, and fast response is generally used for temperature control. The traditional PID control is combined with the dynamic character...

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Problems solved by technology

[0005] In view of the above deficiencies, the present invention proposes a self-tuning PID energy-saving temperature control method, which is self-tuning based on the PSO-DE algorithm, combined with the advantages of the strong local search ability of the differential evolution algorithm, and solves the problem that the PSO algorithm is easy to fall into local optimum problem, and then use the adjusted PID parameters to perform calculations, and convert the calculation results into a duty cycle of a control cycle output pulse, and then adjust the output of heating power, so that the sampled temperature sampling value is consistent with the actual temperature value of the controlled object Approximately equal, reducing the temperature error caused by heating inertia. In addition, because the heating power is increased, the duty cycle of the output pulse is reduced, which has a significant energy-saving effect while improving the temperature control accuracy.

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