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Method for calculating steam temperature feedforward control signal of superheater/reheater of thermal power generating unit

A thermal power unit, feedforward control technology, applied in the direction of calculation, computer-aided design, instruments, etc., can solve the problem of not considering the actual characteristics of the unit operation and changes in coal quality, and achieve the effect of eliminating the impact

Active Publication Date: 2021-08-20
哈尔滨沃华智能电力技术有限公司
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Problems solved by technology

[0005] This invention is to solve the problem of the feed-forward control method of the steam temperature of the superheater / reheater of the existing thermal power unit, which does not consider the actual characteristics of the unit operation and the change of coal quality problem, a method for calculating the steam temperature feed-forward control signal of the thermal power unit superheater / reheater is now provided

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  • Method for calculating steam temperature feedforward control signal of superheater/reheater of thermal power generating unit
  • Method for calculating steam temperature feedforward control signal of superheater/reheater of thermal power generating unit
  • Method for calculating steam temperature feedforward control signal of superheater/reheater of thermal power generating unit

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specific Embodiment approach 1

[0037] Specific implementation mode one: refer to figure 1 , 2 and 3 specifically illustrate this embodiment, a method for calculating a thermal power unit superheater / reheater steam temperature feedforward control signal described in this embodiment,

[0038] Respectively obtain the coal supply M 30％ , M 40％ , M 50％ , M 60％ , M 70％ , M 80％ , M 90％ and M 100％ , and the steam flow q v30％ ,q v40％ ,q v50％ ,q v60％ ,q v70％ ,q v80％ ,q v90％ and q v100％ , the above THA working condition (heat consumption rate acceptance working condition) refers to: the steam turbine is normally put into operation with rated steam inlet parameters, rated back pressure, and heat recovery system, the makeup water rate is 0%, and the generator can output rated power continuously. Some are also called rated output conditions.

[0039] Taking the steam flow rate as the independent variable and the coal feed rate as the dependent variable for linear fitting, the linear fitting equation is o...

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Abstract

The invention discloses a thermal power generating unit superheater / reheater steam temperature feedforward control signal calculation method, and relates to the technical field of superheater / reheater steam temperature control. The method aims at solving the problem that in an existing feedforward control method for the steam temperature of the superheater / reheater of the thermal power generating unit, the actual operation characteristics of the unit and the coal quality change condition are not considered. According to the thermal power generating unit superheater / reheater steam temperature feedforward control signal calculation method, the steady-state relation between the coal feeding amount and the steam flow when the load of a thermal power generating unit is stable is firstly calculated, and then the variable quantity of the superheater / reheater outlet steam temperature is calculated according to the coal feeding amount and the steam flow at the current moment; and finally, the variable quantity is taken as a steam temperature feedforward control signal of the superheater / reheater of the thermal power generating unit.

Description

technical field [0001] The invention belongs to the technical field of superheater / reheater steam temperature control. Background technique [0002] Superheater / reheater steam temperature control is an important link to improve the operating economy and ensure safety of thermal power units. Keeping the superheater / reheater steam temperature within the rated range is of great significance to the safe and economical operation of the unit. [0003] In the actual operation of power plants, the fluctuation of superheater / reheater steam temperature is a common problem. When the steam temperature of the superheater / reheater is too high, it will damage the heating surface. When the steam temperature of the reheater is low, it will increase the humidity of the final stage of the steam turbine, which will affect the safe operation of the unit. However, the relationship between steam temperature and operating parameters is often difficult to determine, especially for steam temperature...

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Application Information

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IPC IPC(8): G06F30/20G06F113/08G06F119/08
CPCG06F30/20G06F2119/08G06F2113/08
Inventor 王颖范双双陈玉龙郑翔宇吴明睿张磊姚坤
Owner 哈尔滨沃华智能电力技术有限公司
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