Online dynamic real-time automatic optimizing control method and device for integral parameters

Abstract

The invention belongs to the technical field of automatic control and discloses an online dynamic real-time automatic optimizing control method and device for integral parameters. The method comprisesthe following steps of: detecting whether the measured value of a current operating parameter of a unit is a zero crossing point or not; if the measured value of the current operating parameter of the unit is a zero crossing point, continuously obtaining output values of a PID (Proportion Integration Differentiation) controller before detecting the next zero crossing point, calculating differencevalues between the output values of the PID controller and an initial output value and recording the maximum difference value m3 and the minimum difference value m1; and when detecting the next zerocrossing point, calculating the ratio K of the proportional action to the integral action and adjusting preset integral parameters of the PID controller according to the value of the K. The method disclosed by the invention has the beneficial effects that the integral action on the PID controller can be dynamically adjusted and optimized on line and in real time and the optimal control parametersare automatically found, thereby improving the adjustment quality of the controller and enhancing 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 integral 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 desuperheated wa...

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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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