Control method for overcoming fluctuations in main steam pressure in multi-coal mixed firing conditions of heating units

Abstract

The present invention involves a multi -coal -type mixed working condition of heating units to overcome the main steam pressure fluctuation control method. The steps are as follows: Increase the following circuit interface in the control logic configuration of DCS of the heating unit decentralized control systemGive the coal volume control loop interface, overcome the air volume control circuit interface of the main steam pressure fluctuations, overcome the main steam pressure fluctuation of the main steam pressure setting value control loop interface, and overcome the main steam pressure fluctuating steam turbine high -pressure door control loop interface;In the control logic of the control system DCS, the heating unit multi -coal type mixed work conditions overcome the main steam pressure fluctuation logic configuration, and the output is introduced to the main steam pressure fluctuation circuit interface;In real -time running curve, the multi -coal type of the heating units of the heating units is the same as the mixed coal type of the heating unit overcome the relevant parameters of the control circuit of the main steam pressure fluctuations, and finally achieve the expected control effect.The invention coordinate the control system through the existing heating unit DCS DCS. It is good in real -time and the on -site debugging process is simple to facilitate the implementation of the project.

Description

technical field [0001] The invention belongs to the technical field of automatic control of thermal power generating units, and in particular relates to a control method for overcoming main steam pressure fluctuations in a heating unit under a multi-coal mixed combustion condition. It can be used for automatic control of the main steam pressure of the heating thermal power unit during the actual operation, ensuring that the unit can automatically control the main steam pressure within a reasonable range while the load response is fast and stable. Background technique [0002] The operating conditions of heating thermal power units are changeable, including pure condensing steam conditions, industrial extraction steam conditions, heating extraction steam conditions, and simultaneous industrial extraction steam and heating extraction steam conditions. The operating characteristics of the heating unit under different working conditions are different, and the requirements for th...

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Problems solved by technology

[0005] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a control method for overcoming main steam pressure fluctuations in the multi-coal mixed combustion working condition of the heating unit. The problem of automatic pressure control, give full play to the potential of the equipment, and ensure the stability of the main parameters while meeting the requirements of frequency regulation and peak regulation of the power grid

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