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Method and device for disequilibrium deviation control and automatic control system for thermal power plant

A control method and technology of a control device, which are applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as unbalanced deviation control and different numerical values, and meet the requirements of different positive and negative deviation overshoots. Effect

Active Publication Date: 2016-08-17
CHINA SHENHUA ENERGY CO LTD +2
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Problems solved by technology

[0003] The purpose of the present invention is to provide a non-balanced deviation control method, device and thermal power plant automatic control system, which are used to solve the problem of non-balanced deviation control of the thermal power plant automatic control system, so as to realize automatic control of thermal power plants when positive deviations and negative deviations enter When the value of the regulator of the control system is different, it can meet the different requirements of the maximum overshoot of the automatic control system

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  • Method and device for disequilibrium deviation control and automatic control system for thermal power plant

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[0024] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0025] Embodiments of the present invention provide a non-equilibrium deviation control method, such as figure 1 As shown, the non-equilibrium deviation control method includes:

[0026] Step S1, calculating the deviation between the measurement value of the measurement object and the set value.

[0027] In this step, the set value can be manually set by the operator, the measured value can be collected by the sensor corresponding to the measurement object, and the calculation of the deviation can be realized by the calculation function of a conventional comparator or a conventional controller.

[0028] Step S2, calculating the rate of change of the measured v...

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Abstract

The invention relates to the field of thermal control and automation and discloses a method and device for disequilibrium deviation control and an automatic control system for a thermal power plant. The method for disequilibrium deviation control comprises the steps of calculating deviation of a measured value and a set value of a measured object; calculating a change rate of the measured value; and adjusting the set value according to the deviation and the change rate, so that positive deviation and negative deviation of the set value are different. According to the method and device for disequilibrium deviation control and the automatic control system for the thermal power plant, the effect of non-linear conversion of a deviation value of the automatic control system is achieved, values of the positive deviation and the negative deviation entering a regulator of the automatic control system are different, and thus the requirements on different positive deviation and negative deviation overshoots of the automatic control system are met.

Description

technical field [0001] The invention relates to the field of thermal control and automation, in particular to an unbalanced deviation control method and device, and an automatic control system for a thermal power plant. Background technique [0002] In the thermal power plant automatic control system, since the calculation of the deviation (difference between the measured value and the set value) is linear, the control of the deviation is balanced, that is, the maximum deviation value above and below the set value is the same, For example, for the main steam temperature automatic adjustment index, it can only be stipulated within the range of ±5°C or ±10°C of the set value, and it cannot be stipulated that positive deviation and negative deviation should be treated separately. However, in the production process, the tolerance value for the deviation is different. For example, due to the life limit of the metal material, the temperature of the main steam is required to be con...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 张秋生王路杰万太浩胡轶群
Owner CHINA SHENHUA ENERGY CO LTD
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