Thermal power generating unit coal feed amount control method based on frequency modulation and peak regulation of power grid

Abstract

The invention relates to a thermal power generating unit coal feed amount control method based on frequency modulation and peak regulation of a power grid. The method includes the following steps that a thermal power generating unit coal feed amount control loop interface based on frequency modulation and peak regulation of the power grid is added to a logical configuration coal feed amount control loop of an original coordination control system; logical configuration of a thermal power generating unit coal feed amount control loop based on frequency modulation and peak regulation of the power grid is carried out, and output of the logical configuration of the thermal power generating unit coal feed amount control loop based on frequency modulation is introduced to the thermal power generating unit coal feed amount control loop interface based on frequency modulation and peak regulation of the power grid to serve as feedforward signals for controlling the coal feed amount; the control system is put into actual operation, according to the real-time operation curve, relevant parameters of the thermal power generating unit coal feed amount control loop based on frequency modulation and peak regulation of the power grid are set online, and finally the expected control effect is achieved. By means of the existing DCS coordination control system, the real time performance is good, the on-site debugging process is simple, and project realization is facilitated. By judging the operating state of the unit, the coal feed amounts of the unit in different operation states are accurately controlled, fast load response of the unit participating in frequency modulation and peak regulation and the stability of main parameters are guaranteed, the labor intensity of operators is reduced, and the safety and the economical efficiency of operation of the unit are greatly improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of automatic control of thermal power generating sets, and in particular relates to a method for controlling the amount of coal fed to thermal power generating sets based on power grid frequency and peak regulation. It can be used for the automatic control of the coal supply when the thermal power unit participates in the frequency regulation and peak regulation of the power grid, so as to ensure that the unit can automatically control the main parameters within a reasonable range while the response of the frequency regulation and peak regulation is fast and stable. Background technique [0003] Frequency modulation and peak regulation is an important means for power grid companies to maintain grid frequency stability. For the safety, stability and economical operation of the power grid and to improve the quality of power supply, the power grid company requires that the on-grid thermal power genera...

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Problems solved by technology

[0005]The above documents and patents mainly elaborated from the establishment of unit mathematical model, the design of unit control strategy and the setting of control system parameters, etc., and proposed a coordinated control System design methods and application examples, but there is no targeted research on the control of coal supply under different working conditions in the process of frequency regulation and peak regulation

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