Boiler control method and system based on automatic optimization fuzzy three-level PID

Abstract

The invention discloses a boiler control system based on automatic optimization fuzzy three-level PID. The boiler control system comprises a collection module, a comparison module and a control module. The collection module is used for collecting an input value of a sensor in boiler steam, and the input value of the sensor comprises a steam pressure value. The comparison module is used for conducting comparison operation processing on the collected steam pressure value and a preset target value, and a comparison result is obtained; and the control module is used for executing a control instruction corresponding to the comparison result on a boiler according to the obtained comparison result. By means of the boiler control system based on automatic optimization fuzzy three-level PID, the basic theory and method of fuzzy mathematics, an ADRC automatic anti-interference controller and a PID algorithm are used, rule conditions and operation are shown through a fuzzy set with the combination of use experience, fuzzy control rules and relevant information are adopted as knowledge to be stored into a controller knowledge base, then a controller runs fuzzy inference and automatic optimization according to the practical responding condition of the system, optimal adjustment of PID parameters is automatically achieved, and an automatic optimization function is achieved.

Description

technical field [0001] The invention relates to the field of control, in particular to a boiler control method and system based on automatic optimization fuzzy three-stage PID. Background technique [0002] The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy. [0003] With the expansion of industrial production scale and the continuous updating of production equipment, boilers are developing towards the direction of large capacity, high parameters and high efficiency, so the control of boilers has become very important. Due to the tight coupling and mutual influence of boilers and various changing processes, these have increased the difficulty of boiler control. In the operation of a high-energy-efficiency boiler, it needs to include features such as frequency conversion co...

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional control technologies mainly include: 1) The commonly used cascade three-impulse PID control, although the control technology for boilers has been developed relatively mature, but its control system structure is very complex, and its robustness and dynamic characteristics are poor, and it is also No adaptive ability; 2) The introduction of advanced control, such as fuzzy control, fuzzy PID control, predictive function control, expert control, neural network control, etc.

Although fuzzy control, fuzzy PID control and expert control have been popularized and applied in process industrial control, they are still only suitable for industrial control systems with weak system coupling, obvious linear characteristics, and a single control object.

The existing control method can no longer meet the requirements of control, therefore, a new boiler control method needs to be proposed to achieve the purpose of control

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