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A fast variable load control method for subcritical circulating fluidized bed boiler units

A circulating fluidized bed and boiler unit technology, applied in fluidized bed combustion equipment, combustion methods, control systems, etc., can solve problems such as large energy storage, achieve the effects of improving stability, facilitating engineering applications, and improving regulation quality

Inactive Publication Date: 2019-04-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the energy storage on the fuel side of the circulating fluidized bed boiler is very large

Method used

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  • A fast variable load control method for subcritical circulating fluidized bed boiler units
  • A fast variable load control method for subcritical circulating fluidized bed boiler units
  • A fast variable load control method for subcritical circulating fluidized bed boiler units

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Experimental program
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Embodiment Construction

[0030] Embodiment of the present invention: a subcritical circulating fluidized bed boiler unit rapid variable load control method, such as figure 1 shown, including the following steps:

[0031] S1, AGC load instruction is multiplied by k after differential processing 1 Get the control subsignal I, k 1 is the conversion coefficient between control sub-signal Ⅰ and boiler main control signal;

[0032] S2, the main steam pressure deviation signal is adjusted by PID to control sub-signal II;

[0033] S3, turbine energy demand signal After differentiation, multiply by k 2 Get the control sub-signal III, k 2 is the conversion coefficient between control sub-signal Ⅲ and boiler main control signal;

[0034] S4. Obtain the leading energy signal E of the boiler through the instant carbon mechanism model B ;

[0035] S5, the deviation between the turbine energy demand signal and the boiler's leading energy signal is adjusted by PID to obtain IV, and output to the boiler main ...

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Abstract

The invention discloses a quick load change control method of a subcritical circulating fluidized bed boiler unit. The control method respectively processes an AGC load instruction, a main steam pressure deviation signal, a steam turbine energy demand signal and a deviation between the steam turbine energy demand signal and a boiler advanced energy signal to obtain four corresponding control sub signals; the four control sub signals are summed to output to a boiler main controller; and the quick load change operation of the boiler unit is controlled according to the output of the boiler main controller. The method can improve the adjusting quality of the unit, the quick load change capacity of the unit and the capacity of adapting to the unit load response.

Description

technical field [0001] The invention relates to a subcritical circulating fluidized bed boiler unit rapid variable load control method, which belongs to the technical field of boiler rapid variable load operation control. Background technique [0002] With the continuous increase of large-capacity units and the increasing automation of power grid dispatching, large-capacity units are required to operate in the mode of Automatic Generation Control (AGC), which puts forward new requirements for the rapid load change system of power plant units . my country's new energy power is growing rapidly, while wind power curtailment and photovoltaic curtailment are severe. In addition to objective factors such as channels and policies, the root cause of new energy grid connection problems lies in the insufficient elastic capacity provided by traditional power generation in regional power grids. For the generator set, it is hoped that the controlled parameters will not fluctuate greatl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/28F22B35/00
CPCF22B35/00F23C10/28
Inventor 高明明洪烽刘吉臻杨婷婷林再法李丞亮
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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