Control method of coal supply for thermal power units based on power grid frequency regulation and peak regulation

Abstract

The present invention relates to a thermal power unit coal supply control method based on power grid frequency modulation and peak regulation. The steps are as follows: adding a thermal power unit coal supply control circuit based on power grid frequency modulation and peak regulation to the logic configuration coal supply control loop of the original coordination control system Interface; carry out logic configuration of the thermal power unit coal supply control loop based on power grid frequency and peak regulation, and introduce its output into the coal supply control loop interface of thermal power unit based on power grid frequency and peak regulation as a feedforward signal for coal supply control ; The control system is put into actual operation, and according to the real-time operation curve, the relevant parameters of the thermal power unit coal supply control loop based on frequency modulation and peak regulation of the power grid are adjusted online, and the expected control effect is finally achieved. Through the existing DCS coordination control system, the present invention has good real-time performance, simple on-site debugging process, and is convenient for engineering realization. By judging the operating status of the unit, accurately control the amount of coal fed to the unit in different operating states, ensure the quick response of the load and the stability of the main parameters when the unit participates in frequency regulation and peak regulation, reduce the labor intensity of the operating personnel, and greatly improve the efficiency of the unit. The safety and economy of unit operation.

Description

technical field [0001] 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 [0002] 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 generating units...

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Problems solved by technology

[0004] The above documents and patents mainly elaborate on the establishment of unit mathematical model, design of unit control strategy, and setting of control system parameters, and propose a coordinated control system design method and application examples. There is no targeted research on the control of coal supply under different working conditions

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