Supercritical DC furnace synthesis type coordinating control method

A supercritical direct current furnace and coordinated control technology, which is applied in the direction of control system, steam generation, lighting and heating equipment, etc., to achieve the effect of improving dynamic response ability, improving control effect and improving control stability

Active Publication Date: 2009-08-19
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

However, the control of the supercritical DC furnace is still a relatively new research field in the field of thermal automatic control in my country, and because the supercritical DC furnace has no steam drum, the workin

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  • Supercritical DC furnace synthesis type coordinating control method
  • Supercritical DC furnace synthesis type coordinating control method

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[0012] The present invention will be described in detail below with reference to the drawings and embodiments.

[0013] Such as figure 1 As shown, the basic idea of ​​the present invention is to add an incremental state observer and an inertial suppressor as the feedforward of the combustion rate control in the traditional coordinated control system, and add a feedwater incremental state observer as the feedwater control system. Feedforward, used to improve the dynamic effect of feedwater control. For the supercritical once-through furnace, because a certain amount of heat corresponds to a certain amount of water, a calorific value observer is added to the calorific value calculation loop of the traditional coordinated control system, which corrects the caloric signal of coal burning in real time.

[0014] Based on the above basic ideas, the method of the present invention includes the following steps:

[0015] 1. Carry out the logical configuration of the traditional coordinated...

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Abstract

The invention relates to a comprehensive method for harmonizing and controlling a supercritical monotube boiler, comprising the steps as follows: 1) logic configuration of a traditional harmonizing and controlling system is carried out, the differential signal of the practical load given value is added in main control circuit of the boiler of the traditional harmonizing and controlling system, and interfaces are preserved for an increment-typed state observer, an inertia suppressor and a heat value observer; 2) the logic configuration of the increment-typed state observer is carried out and the output thereof is led into the traditional harmonizing and controlling system so as to be used as a feedforward signal for controlling the combustion rate; 3) the logic configuration of the inertia suppressor is carried out and the output thereof is led into the traditional harmonizing and controlling system so as to be used as the feedforward signal for controlling the combustion rate; 4) the logic configuration of the water-supply increment-typed state observer is carried out and the output thereof is led into the traditional harmonizing and controlling system so as to be used as a feedforward signal for controlling the water-supply; 5) the heat value observer is added in the heat value calculation circuit of the traditional harmonizing and controlling system, thus leading the heating-value signal of the quantity of the coal entering the boiler to be corrected. The method obtains excellent control effect during the controlling to the supercritical monotube boiler.

Description

technical field [0001] The invention relates to a thermal automatic control method, in particular to a comprehensive coordinated control method for a supercritical DC furnace. Background technique [0002] With the continuous development of my country's electric power industry, the generating capacity of unit thermal power generating units has also been greatly improved. The current unit thermal power generation unit has changed from the original 300MW subcritical steam drum furnace to the 600MW supercritical DC furnace and 1000MW ultra-supercritical DC furnace. However, the control of the supercritical DC furnace is still a relatively new research field in the field of thermal automatic control in my country, and because the supercritical DC furnace has no steam drum, the working medium flow and energy flow of the supercritical unit are coupled with each other, so that in each control Loops, such as feed water, steam temperature, and load control loops, have strong nonlinea...

Claims

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Application Information

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IPC IPC(8): F22B35/18F22B3/08
Inventor 韩忠旭周传心
Owner CHINA ELECTRIC POWER RES INST
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