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A Control Method to Prevent Integral Windup

A technology of control method and adjustment method, which can be applied to controllers with specific characteristics, electric controllers, comprehensive factory control, etc., can solve problems affecting equipment safety, etc., and achieve the effect of prolonging unit life, avoiding integral saturation, and simple logic.

Active Publication Date: 2022-03-18
CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a control method for preventing integral saturation, which is used to solve the problem that the integral saturation phenomenon of the PID controller of the thermal power plant unit affects the safety of the equipment

Method used

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  • A Control Method to Prevent Integral Windup
  • A Control Method to Prevent Integral Windup

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 Shown is the classic control block diagram of the thermal power plant control system. The PID adjustment method is: after the difference between the set value of the adjusted quantity and the actual value of the adjusted quantity, the closed-loop control is carried out through the PID regulator, and the output of the PID is transmitted to the actuator M. / A to realize the regulation of the controlled object.

[0025] The control method of the present invention is in figure 1 On the basis of the above, an auxiliary overriding logic is added, which is configured and implemented in the DCS of each power plant. The auxiliary overriding logic, its overriding signal can only work when the command of the actuator reaches the uppe...

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Abstract

The invention relates to a control method for preventing integral saturation, which detects the command value of the actuator and judges: when the command value of the actuator reaches the upper limit value, the PID regulator tracks the upper limit value, and after the first set time, The PID regulator switches to the original regulation mode; when the command value of the actuator reaches the lower limit value, the PID regulator tracks the lower limit value, and after the second set time, the PID regulator switches to the original regulation method. The method of the present invention has simple logic and obvious effect, can effectively avoid the phenomenon of controller failure, solves the problem of integral saturation, ensures the adjustment quality of each controller, improves the stability and economy of the whole system, and indirectly prolongs the life of the unit.

Description

technical field [0001] The invention belongs to the technical field of automatic control of thermal power plants, and in particular relates to a control method for preventing integral saturation. Background technique [0002] At present, the national power industry is developing faster and faster, and the level of automation is getting higher and higher. DCS control has been widely used in various thermal power plants. The quality of PID controller adjustment in each DCS directly affects the stability and economy of unit operation. Even unit life. However, the PID controllers in some DCSs currently have the defect of integral saturation. [0003] Such as figure 1 The classic control block diagram of the thermal power plant control system is shown. The adjustment principle is: after the difference between the actual value and the set value of the adjusted quantity, the closed-loop control is performed through the PID regulator, and the output obtained is transmitted to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42G05B19/418
CPCY02P90/02
Inventor 袁世通毕艳洲杨亚飞魏庆海张东海李秋影
Owner CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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