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Energy-saving coordination control method for coal-fired power units

A thermal power generation unit, coordinated control technology, applied in the direction of electrical program control, program control, comprehensive factory control, etc., can solve the problem of large throttling loss of capacity air regulating valve, achieve the effect of convenient configuration and improved economy

Active Publication Date: 2015-12-23
STATE GRID CORP OF CHINA +2
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an energy-saving coordinated control method for thermal power generating units, which is used in the boiler / steam turbine coordinated control system of thermal power generating units with double-inlet and double-outlet coal pulverization systems. The method can solve the problem of large throttling loss of the coal mill capacity air adjustment door, improve the economical efficiency of the unit, and reduce energy consumption

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  • Energy-saving coordination control method for coal-fired power units
  • Energy-saving coordination control method for coal-fired power units
  • Energy-saving coordination control method for coal-fired power units

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] The invention provides an energy-saving coordinated control method for a thermal power generating set, comprising the following steps:

[0032] (1) Fully open the capacity air regulating door of the coal mill;

[0033] (2) Feedforward signal calculation of primary air pressure setting value. Such as figure 1 As shown, through the DCS analog input channel, the unit load command signal is taken, and the primary air pressure set value feedforward function is calculated to form the primary air pressure set value feedforward signal. The primary air pressure set value feedforward function corresponds to The relationship is shown in Table 1 and Table 2, and the specific function form is determined according to the operating data of the unit. The feed-forward function of the primary air pressure setting value in Table 1 and Table 2 ...

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Abstract

The invention discloses an energy-saving coordination control method for coal-fired power units, comprising the steps as follows: (1) fully opening the capacity air damper of a coal mill; (2) forming a primary air pressure set value feed-forward signal based on a unit load instruction; (3) correcting a deviation signal of the main steam pressure and a set value thereof through PID operation to form a primary air pressure set value correction signal, and adding the signal and the primary air pressure set value feed-forward signal in step (2) together to form a primary air pressure set value signal; (4) correcting a deviation signal of the primary air pressure and a set value thereof through PID operation, and adjusting the primary air pressure to control the amount of fuel into a boiler furnace; and (5) controlling the unit power by adjusting the high-pressure control valve of a steam turbine. According to the invention, by fully opening the capacity air damper of the coal mill and adjusting the primary air pressure through a primary fan frequency converter to control the amount of fuel into the boiler furnace, the throttling loss of the capacity air damper of the coal mill is reduced, and the economic benefit of unit operation is improved.

Description

technical field [0001] The invention belongs to the technical field of control engineering. It relates to an energy-saving coordinated control method for a thermal power generating set. Background technique [0002] Energy conservation and emission reduction is a major strategic issue related to sustainable economic and social development. The electric power industry is not only a creator of high-quality clean energy, but also a large primary energy consumer and a major polluter. Therefore, it is also a key area for the country to implement energy conservation and emission reduction. Energy saving and consumption reduction of thermal power generating units is an important measure to respond to the national energy saving and emission reduction and low-carbon economy, and it is an effective measure to enhance the market competitiveness of thermal power plants. [0003] Thermal power generation refers to the general term for using the heat generated by the combustion of coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41865
Inventor 陈厚涛张建玲朱晓星寻新
Owner STATE GRID CORP OF CHINA
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