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Method and device for controlling direct-current generator set of coal-fired boiler

A technology for generator sets and coal-fired boilers, which is applied to the control system, control of water supply, engine components, etc., can solve problems such as damage, output power unfavorable grid voltage, etc., and achieve the effect of reducing the degree of fluctuation and time

Active Publication Date: 2014-04-02
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The long-term fluctuation of the output power of the coal-fired boiler DC generator set is not conducive to the stability of the grid voltage. If the fluctuation is too intense, it will cause damage to other equipment connected to the grid

Method used

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  • Method and device for controlling direct-current generator set of coal-fired boiler
  • Method and device for controlling direct-current generator set of coal-fired boiler
  • Method and device for controlling direct-current generator set of coal-fired boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a control method for a coal-fired boiler DC generator set, see Figure 1a , the method flow provided by this embodiment is specifically as follows:

[0038] S101. Receive a standard adjustment command, the standard adjustment command carries a target output power and / or a target flue gas oxygen content and / or a target midpoint enthalpy and / or a target main steam temperature and / or a target main steam pressure.

[0039] The output power refers to the power of the coal-fired boiler DC generator set to output electric energy to the grid.

[0040] The oxygen content of the flue gas refers to the oxygen content of the gas in the combustion chamber of the boiler. Combustion requires oxygen, and the pulverized coal injected into the combustion chamber can only be combusted if it is fully mixed with the oxygen in the air. Therefore, the oxygen content of the flue gas is an important indicator of whether the combustion is sufficient.

[0041] The interm...

Embodiment 2

[0088] This embodiment provides a control method for a coal-fired boiler DC generator set, see figure 2 , the method flow provided by this embodiment is specifically as follows:

[0089] S201. Receive a standard adjustment command, the standard adjustment command carries a target output power and / or a target flue gas oxygen content and / or a target midpoint enthalpy and / or a target main steam temperature and / or a target main steam pressure.

[0090] S202. Obtain the current actual output power and / or actual flue gas oxygen content and / or actual mid-point enthalpy and / or actual main steam temperature and / or actual main steam pressure of the DC generator set of the coal-fired boiler.

[0091] S203. Obtain a coal feeding rate reference value corresponding to the target output power according to the preset first mapping relationship table.

[0092] The first mapping table may be determined through on-site experiments. Specifically, field experiments were carried out in the range...

Embodiment 3

[0149] This embodiment provides a control device for a coal-fired boiler generator set, see image 3 , the device consists of:

[0150] The receiving module 301 is configured to receive a standard adjustment command, the standard adjustment command carries a target output power and / or a target flue gas oxygen content and / or a target midpoint enthalpy and / or a target main steam temperature and / or a target main steam pressure;

[0151] The feedback module 302 is used to obtain the current actual output power and / or actual flue gas oxygen content and / or actual mid-point enthalpy and / or actual main steam temperature and / or actual main steam pressure of the coal-fired boiler DC generator set;

[0152] The first feed-forward controller 303 is configured to obtain the coal feeding rate reference value corresponding to the target output power obtained by the receiving module 301 according to the preset first mapping relationship table;

[0153] The first obtaining module 304 is used...

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Abstract

The invention discloses a method for controlling a direct-current generator set of a coal-fired boiler, and belongs to the technical field of generator set control. The method comprises the following steps of receiving a standard adjustment instruction; acquiring the current actual output power and the like of the direct-current generator set of the coal-fired boiler; acquiring a coal supply rate reference value corresponding to a target output power; acquiring a target coal supply rate; acquiring a target air supply rate; acquiring target water supply flow; acquiring target attemperation water flow; acquiring target turbine valve opening; generating a direct adjustment instruction and sending the direct adjustment instruction to the direct-current generator set of the coal-fired boiler. The output power of the direct-current generator set of the coal-fired boiler is adjusted by simultaneously adjusting the coal supply rate and the like which have influence on the output power of the direct-current generator set of the coal-fired boiler, the fluctuation degree of the output power can be reduced, and the fluctuation time of the output power can be shortened.

Description

technical field [0001] The invention relates to the technical field of generator set control, in particular to a control method and a control device for a coal-fired boiler DC generator set. Background technique [0002] The coal-fired boiler DC generator set is the main equipment of the thermal power station, which converts the heat energy generated by the combustion of coal and other fuels into electrical energy. The output power of the coal-fired boiler DC generator set is jointly determined by the coal supply per unit time, the water supply per unit time, the opening of the steam turbine valve, the main steam pressure and the main steam temperature, among which the main steam pressure and main steam temperature are also affected by the unit time The influence of packing quantity, water supply per unit time and steam turbine valve opening. Coal-fired boiler DC generator sets are usually connected to the grid dispatching system, and are controlled by the grid dispatching ...

Claims

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Application Information

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IPC IPC(8): F22B35/00F22D5/26F01D17/00
Inventor 罗嘉黄卫剑万文军伍宇忠苏凯李晓枫李东海薛亚丽
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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