Coordination control method for coal-fired cogeneration unit under self-adaptive BTU

A combined heat and power unit, coordinated control technology, applied in the direction of combustion method, combustion control, fuel supply adjustment, etc., can solve the problems of high cost, complex control logic, and long time consumption

Active Publication Date: 2021-09-14
天津华能杨柳青热电有限责任公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009]According to the existing coal quality analysis methods proposed above, it is time-consuming, complex in structure, high in cost, and comp

Method used

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  • Coordination control method for coal-fired cogeneration unit under self-adaptive BTU
  • Coordination control method for coal-fired cogeneration unit under self-adaptive BTU
  • Coordination control method for coal-fired cogeneration unit under self-adaptive BTU

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Embodiment 1

[0059] Summary of this example, the power plant boiler is a 300MW (cogeneration) coal-fired generator set, model BLK-1025, subcritical parameters, direct-blown pulverization system, double combustion chamber, 100% fly ash reburning, direct-current liquid Slagging furnace, two medium-speed coal mills are designed on each side of the double combustion chamber. 16 swirl burners are arranged on the top of the combustion chamber, and one coal mill is matched with four burners in different positions. In order to ensure stable combustion, the burner is designed with the swirl adjustment of the central air duct and the secondary air duct. The actual application numerical example of the 300MW cogeneration unit is as follows:

[0060] 1. Coal quality correction coefficient output example

[0061] Set the standard coal combustion state, that is, under 4% oxygen content, the current load is 330MW, and the total coal supply is 36kg / s. When the coal quality changes, assuming that the coal...

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Abstract

The invention provides a coordination control method for a coal-fired cogeneration unit under a self-adaptive BTU. The method comprises the following steps of acquiring standard coal quantities under different generating capacities; regularly detecting and optimally outputting the coal quality correction coefficient BTU through the logical configuration of a decentralized control system; and correcting the differential feedforward of the main steam pressure deviation, the proportion feedforward of an unit load instruction and the proportionality coefficient of a boiler master control through the coal quality correction coefficient BTU, correcting a fuel master control, and correcting the adjustment output of a secondary air door of the boiler. According to the coordination control method for the coal-fired cogeneration unit under the self-adaptive BTU, the stability of main controlled parameters of the unit is greatly improved, coordinated control and automatic power generation control indexes of the unit can be guaranteed, meanwhile, wind and coal parameter changes are smoother during load change, the adjustment variation of main parameters of the unit is further reduced, and the economical efficiency of the unit is higher; the influence of internal and external disturbance on coordination control and automatic power generation control adjustment is reduced, and the safe and economic operation level of the unit is improved.

Description

technical field [0001] The invention relates to the technical fields of production safety and thermal control of coal-fired cogeneration units, and in particular to a coordinated control method for coal-fired cogeneration units under self-adaptive BTU. Background technique [0002] With the wide application of material technology and clean energy (including water energy, wind energy, solar energy, etc.), the long-distance transmission of ultra / ultra-high voltage AC and DC, and the construction of large-scale power base stations, the need for frequency regulation and peak regulation of the power grid is becoming more and more frequent. Quality requirements are also getting higher and higher. At this stage, my country's power grid structure is still dominated by thermal power generation, and realizes AGC economic dispatch to save energy. The existing AGC adjustment is mainly based on coordination, but in the coordination control system, there are two problems that cannot be s...

Claims

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Application Information

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IPC IPC(8): F23N1/10
CPCF23N1/102
Inventor 赵娜张少伟侯宁娇丽莹黄莹高蕴珈吴彦桥陈金伟张伟伟赵猛张磊王铁军
Owner 天津华能杨柳青热电有限责任公司
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