Coal-fired unit coordination control method and system

A coal-fired unit, coordinated control technology, applied in the direction of electric controllers, controllers with specific characteristics, etc., can solve the inability to guarantee the depth, speed, accuracy and quality requirements of load adjustment, poor coordination control adjustment quality, and anti-interference ability Weak and other issues

Pending Publication Date: 2020-06-19
兰州陇能电力科技有限公司
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  • Abstract
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Problems solved by technology

[0005] At present, there are disadvantages such as poor coordination control and adjustment quality and weak anti-interference ability in the process of deep load

Method used

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  • Coal-fired unit coordination control method and system
  • Coal-fired unit coordination control method and system
  • Coal-fired unit coordination control method and system

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[0106] Example

[0107] figure 1 It is a schematic diagram of the coordinated control method of coal-fired units in the embodiment of the present invention, such as figure 1 As shown, the coordinated control method for coal-fired units provided by the present invention is based on figure 1 The shown use of furnace coordination control unit, machine coordination control unit, DEH frequency modulation fast action unit, proportional link, integral link, feedforward main steam pressure safety restraint link, variable load integral mode, steady state integral mode, variable load rate generation link In the main steam pressure correction link, the coal-fired unit coordinated control method of the present invention acts on the deep variable load coordinated control system.

[0108] The boiler coordinated control unit is used to optimize the PI function of the main steam pressure regulator and the effective control of the feedforward amount, which not only ensures the rapidity and accuracy ...

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Abstract

The invention discloses a coal-fired unit coordination control method and system. The method comprises the steps that proportional adjustment is conducted according to a boiler heat signal and the current fuel quantity, and a proportional adjustment result is obtained; integral adjustment is conducted according to a coal-fired unit load instruction and a pressure deviation signal, and an integraladjustment result is obtained; boiler coordination control is carried out according to a boiler heat signal, a turbine energy demand signal, the proportional adjustment result and the integral adjustment result; a variable load rate correction coefficient is determined according to the actual value of the main steam pressure of a coal-fired unit and the sliding pressure instruction of the coal-fired unit; the variable load rate set value is corrected according to the variable load rate correction coefficient to obtain a corrected variable load rate; a coal-fired unit load regulator set value is determined according to the corrected variable load rate and the coal-fired unit load instruction; machine coordination control is carried out according to the set value of the load regulator of thecoal-fired unit and the actual load. The method has the advantages of being capable of guaranteeing deep regulation of the load in the load changing process of the coal-fired unit and improving regulation quality.

Description

technical field [0001] The invention relates to the technical field of coordinated control of power plants, in particular to a method and system for coordinated control of coal-fired units. Background technique [0002] Compared with the conventional peak shaving mode, when the peak shaving depth of the coal-fired unit is continuously decreasing, each system gradually approaches the lower limit of safety adjustment, and problems such as reduced adjustment margin and poor linearity are prominent. At the same time, the wind, coal, The dynamic response characteristics of water change, the nonlinear characteristics are obviously strengthened, and the coupling effects between systems are obvious, resulting in poor adjustment quality and adaptability of coordinated control, weakened anti-interference ability, and high operational risk. [0003] In the case of normal peak shaving of the power grid, the Automatic Generation Control (AGC) command is adjusted with continuous or repeat...

Claims

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Application Information

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IPC IPC(8): G05B11/42
CPCG05B11/42Y02P90/02
Inventor 张顺葛智平姚洪宇曹士保李生鹏高亚洲闫培飞
Owner 兰州陇能电力科技有限公司
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