A Coal Supply Quantity Optimization Control Method for Unit Bypass Heating

Abstract

The invention relates to the technical field of automatic control methods, in particular to a coal feeding amount optimization control method for unit bypass heat supply. Through optimizing a coal feeding amount instruction control logic of a heat supply unit dispersion control system (DCS), the heat supply quality of the heat supply unit can be ensured to automatically meet the frequency modulation and peak modulation requirements of a power grid under the bypass heat supply working condition. The method comprises the steps that the coal feeding amount instruction automatic control logic of the unit bypass heat supply is designed; a configuration heat supply load converting coal feeding amount instruction automatic control logic is formed; a configuration unit load corresponding coal feeding amount instruction automatic control logic is formed; a configuration load change dynamic coal feeding amount instruction automatic control logic is formed; a configuration main steam pressure correcting coal feeding amount instruction automatic control logic is formed; and the DCS historical operation data of the unit are inquired. According to the existing unit DCS coal feeding amount control system, the frequency modulation and peak modulation requirements of the power grid can be automatically met by the heat supply unit under the condition that the heat supply quality is ensured; andthe labor intensity of operators is reduced, the real-time performance is good, the field debugging process is simple, and engineering implementation is facilitated.

Description

technical field [0001] The invention relates to the technical field of an automatic control method, in particular to a method for optimally controlling the amount of coal supplied to a unit for bypass heating. Background technique [0002] In order to improve the consumption capacity of new energy, the National Energy Administration has put forward clear requirements for the transformation of thermal power flexibility. The methods for improving the flexibility of thermal power are divided into three types according to the unit type: heat and power decoupling for cogeneration units to reduce unit output during peak heat loads, The pure condensing unit undergoes unit transformation to achieve deep peak regulation; according to the transformation method, it is divided into: the external transformation of the unit is equipped with electric energy consumption devices such as electric boilers, batteries, compressed air energy storage, or thermal energy consumption devices such as h...

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Problems solved by technology

[0004] The above documents and patents mainly elaborated on the design of the conventional control strategy for the unit’s coal supply, the setting of the parameters of the conventional control system, and the layout of the heating transformation of the bypass system. No targeted research on control methods

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