A proportional parameter online dynamic real-time automatic optimization control method and device

Abstract

The invention belongs to the technical field of automatic control, and discloses a proportional parameter online dynamic real-time automatic optimization control method and device. The method includes: detecting a positive zero crossing or a negative zero crossing; if it is a positive zero crossing, determining the maximum and minimum values ​​between the current positive zero crossing and the next positive zero crossing; Zero-crossing point, adjust the proportional parameter of the PID controller according to the absolute value of the ratio of the maximum value to the minimum value; If the difference between the measured value and the set value of the operating parameter of the unit is not within the preset threshold range for longer than the second preset time period, the proportional parameter is adjusted when the next zero-crossing point is detected. The invention can automatically adjust the proportional parameters of the PID controller on-line in real time without stopping the machine, improves the adjustment quality of the PID controller, and enhances the automatic control level of the unit.

Description

technical field [0001] The present invention relates to the technical field of automatic control, in particular to an online dynamic real-time automatic optimization control method and device for proportional parameters, and more specifically, an online dynamic real-time automatic optimization method and device for a thermal power unit control system. Background technique [0002] Thermal power generation unit, referred to as "thermal power unit", is a unit that uses coal, oil or combustible gas as fuel to heat the water in the boiler to increase its temperature, and then uses steam with a certain pressure to drive the gas turbine to generate electricity. . [0003] In order to ensure the normal operation of the thermal power unit, the unit control system needs to control various operating parameters of the unit during the operation of the unit, such as main steam temperature, main steam pressure, reheat steam temperature, feed water temperature, superheated and desuperheate...

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Problems solved by technology

[0004] However, the inventors found that with the long-term operation of the thermal power unit, changes in the operating conditions of the unit and the nonlinear characteristics of each control system of the unit will have a certain impact on the adjustment quality of the automatic control system of the unit

In this way, the PID controller parameters set under the original working conditions will have the problem that the PID controller cannot achieve the desired control effect under the current working conditions due to the change of the operating conditions of the unit. The control system cannot meet the adjustment ability and quality required by the current working conditions

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