Thermal power unit load changing rate correcting method based on boiler pressure response characteristic

A technology of response characteristics and thermal power units, applied in mechanical equipment, steam engine devices, machines/engines, etc., can solve problems such as large system following fluctuations, two detailed assessments, large fluctuations in unit main steam pressure, etc., to improve operational stability , The effect of preventing combustion deterioration

Inactive Publication Date: 2020-02-04
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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Problems solved by technology

The variable load rate of the original unit was not automatically corrected in combination with the characteristics of the boiler, resulting in large fluctuations in the main steam pressure of the un

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  • Thermal power unit load changing rate correcting method based on boiler pressure response characteristic

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] The thermal power unit variable load rate method based on the boiler pressure response characteristics of the present invention, such as figure 1 Shown include the following steps:

[0022] Step 1: First, set the pressure deviation judgment value and the benchmark load change rate; the benchmark load change rate is set by the operator according to the assessment standards of the two detailed rules of the power grid; the pressure deviation judgment value includes the load increase fi...

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Abstract

The invention discloses a thermal power unit load changing rate correcting method based on a boiler pressure response characteristic and belongs to the technical field of thermal power generation. Themethod is characterized by comprising the steps that firstly, a pressure deviation judgement constant value and a benchmark load changing rate are set; secondly, a pressure deviation value is obtained after a main steam pressure practical value is subtracted from a main steam pressure set value; thirdly, the pressure deviation value is compared with the pressure deviation judgement constant value, and a load changing control instruction is output; and fourthly, the benchmark load changing rate is subjected to load changing rate correction through a pressure deviation function according to thepressure deviation value, and a final load changing rate is output. When a unit changes a load, the unit load changing rate is automatically corrected according to the real-time changing situation ofthe deviation between the main steam pressure set value and the main steam pressure practical value of the unit, the unit and a boiler are controlled in a coordinated mode truly, and therefore, the operating stability of the unit is improved; and the load changing control instruction is output through the deviation between the main steam pressure set value and the main steam pressure practical value, the load changing rate of the unit is locked, and boiler combustion deterioration under special working conditions is prevented.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a method for varying the load rate of a thermal power unit based on the boiler pressure response characteristics. Background technique [0002] In recent years, with the increase in the proportion of new energy power supply such as wind power and photovoltaic power generation in the power grid, and the stricter assessment of the two detailed rules of the "Power Plant Grid Connection Management Rules" and "Auxiliary Service Compensation" issued by the power grid, the automatic power generation control AGC ( Automatic Generation Control) The load command changes frequently and quickly, the boiler thermal load change characteristics are large inertia, and the large delay lags behind the unit load change, and the unit load change rate is set to a fixed value. The variable load rate of the original unit was not automatically corrected in combination with t...

Claims

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Application Information

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IPC IPC(8): F01K13/02
CPCF01K13/02
Inventor 邹包产刘永红赵宇
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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