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A method for judging the amount of coal fed to units under variable load based on the sis system of a power plant

A technology of unit load and coal supply, which is applied in the field of power engineering, can solve the problems of calorific value calculation error of coal into the furnace, offline measurement method is difficult to meet the requirements, etc., so as to avoid corresponding errors and improve the effect of safe and economical operation

Active Publication Date: 2018-02-06
西安西热电站信息技术有限公司
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  • Application Information

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Problems solved by technology

However, the calorific value of the furnace coal is also changing in real time, and the off-line measurement method is difficult to meet the requirements, and the calculation of the furnace coal calorific value will also introduce corresponding errors

Method used

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  • A method for judging the amount of coal fed to units under variable load based on the sis system of a power plant
  • A method for judging the amount of coal fed to units under variable load based on the sis system of a power plant
  • A method for judging the amount of coal fed to units under variable load based on the sis system of a power plant

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Embodiment Construction

[0020] The present invention includes:

[0021] 1) Statistics of the historical data of unit load changes and coal supply changes before the current moment

[0022] At the moment when the load of the coal-fired generating set changes, the amount of coal that needs to be adjusted is based on the previous historical data, and the current moment is set as t 0 , the current unit load is N 0 , the current coal supply is B 0 , take the t before the current moment of the unit 0 -Δt moment to t 0 time, the corresponding historical data set of unit load change ΔN and coal supply change ΔB is ΔN i , ΔB i , where ΔN i =N i -N 0 , ΔB i =B i -B 0 , i=1~n, N i is the unit load at time i, B i is the unit coal supply at time i, ΔN i and ΔB i Represent the load variation and coal supply variation of the unit at the current moment compared to the moment i, and n is the number of groups sampled in the historical time period of Δt;

[0023] Select the corresponding data of unit lo...

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Abstract

The invention discloses a method for judging the coal feeding amount of a unit under a variable load based on a power plant SIS. The recommended value of the real-time coal feeding amount under the current load is predicted by conducting statistics on historical values of the coal feeding amount of a previous section of the power plant variable load and the unit load through an SIS platform, a calculating method for the real-time coal feeding amount of the unit under the variable unit is given in the situation that the heat value of coal as fired is hard to determine, the data support is provided for optimization of the variable load state and stable operation of a power plant, and the fuel fine management level of the power plant is improved.

Description

technical field [0001] The invention belongs to the power engineering industry, and in particular relates to a method for judging the coal feeding amount of a unit under variable load based on the SIS system of a power plant. Background technique [0002] my country's coal-fired power generation units generally have the problem of variable coal quality, and they also have to undertake a certain task of power grid load peak regulation. How to accurately determine the amount of coal fed to coal-fired boilers plays a vital role in the peak-shaving capability and safe and stable operation of generating units under the condition of variable load and variable coal quality. Generally speaking, there is a definite design correspondence between the power generation load of the unit and the design coal type, but the coal in the power plant is often not the design coal type, and the calorific value deviation is large. Operating according to the design relationship will lead to input he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N1/00F23N5/00F23K3/22
CPCF23K3/22F23N1/00F23N5/00
Inventor 罗睿王智微
Owner 西安西热电站信息技术有限公司
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