Feed-forward control method for direct energy balance strategy

An energy balance, feedforward control technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems affecting the stability of the coordinated control system, the difficulty of real-time correction of coal quality, and the cumbersome adjustment of the control system. The effect of adaptability, improving the degree of automation, and ensuring the safety of operation

Inactive Publication Date: 2014-07-30
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] Purpose of the invention: The present invention provides a direct energy balance strategy feed-forward control method, the purpose of which is to solve the problems of difficulty in real-time correction of coal quality due to frequent changes in coal quality of boiler combustion in the past, the problem of cumbersome setting of the control system, and the need for setting Problems with many parameters and problems affecting the stability of the coordinated control system

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  • Feed-forward control method for direct energy balance strategy

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[0017] detailed description: The present invention will be further described below in conjunction with accompanying drawing:

[0018] Such as figure 1 As shown, the present invention provides a direct energy balance strategy feedforward control method. On the basis of the direct energy balance control strategy, the method uses the feedforward control technology to speed up the response of the boiler to the demand of the steam turbine according to the energy signal. When using the direct energy balance control strategy In the coordinated control mode, the boiler uses the boiler main control command to directly control the input heat of the boiler with the energy demand of the steam turbine to adjust the deviation between the energy demand signal of the steam turbine and the heat signal.

[0019] The method for forming the main control command of the boiler is as follows: use the ratio of the first-stage pressure 1 of the steam turbine to the pre-machine pressure 5 to obtain ...

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Abstract

The invention provides a feed-forward control method for a direct energy balance strategy. On the basis of the direct energy balance control strategy, the feed-forward control technology is used so that a boiler can respond to the requirement of a steam turbine fast according to energy signals; when the direct energy balance control strategy is adopted, under a coordination control mode, the boiler directly controls boiler input heat by utilizing a boiler main control instruction according to the energy requirement of the steam turbine, and adjusts deviation between the energy requirement signals of the steam turbine and the energy signals. According to the feed-forward control method for the direct energy balance strategy, by the implementation of the method, the direct energy balance control strategy can ensure stability of main steam pressure, greatly improve adaptation of unit load fast tracking, and well achieve coordinate control of a unit.

Description

technical field [0001] The invention relates to a feedforward control method of a direct energy balance strategy, which belongs to the field of thermal control. Background technique [0002] The coordinated control system of unit units has become a control system commonly used in large thermal power units. Coordinated control systems can be divided into direct energy balance and indirect energy balance according to the selected control target parameters. The indirect energy balance control strategy takes the measured value of the main steam pressure as the control target parameter, adjusts and maintains the main steam pressure as the set value, and indirectly achieves the control of the energy balance of the machine furnace. The direct energy balance control strategy can adjust the amount of fuel in time according to the change of energy demand on the turbine side and the heat released by the boiler, so as to ensure the balance of energy supply and demand inside the unit, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 焦健叶振起张戟
Owner STATE GRID CORP OF CHINA
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