Self-adaptive variable load instruction generation method and device based on thermal inertia of coal-fired power plant

Abstract

The embodiment of the invention provides a self-adaptive variable load instruction generation method and device based on thermal inertia of a coal-fired power plant, and belongs to the technical fieldof variable load control. The method comprises the steps of determining a target load in response to a received variable load instruction; obtaining an initial load of a coal-fired power plant; calculating the current load increment of the coal-fired power plant according to a load increment function, wherein the load increment function is an S curve function; and generating the load instructionof the coal-fired power plant according to the initial load, the target load and the current load increment. According to the method, a variable load instruction is change gently in a variable load initial stage, the variable load rate changes quickly in a variable load middle stage, and at a variable load end, the variable load instruction change rate is reduced in advance, so that the problems that in the linear variable load process, due to thermal inertia, the boiler efficiency is reduced, steam-water parameters are unstable, and the control effect is poor are effectively solved.

Description

technical field [0001] The invention relates to the technical field of variable load control, in particular to a method for generating an adaptive variable load command based on thermal inertia of a coal-fired power station and a device for generating an adaptive variable load command based on the thermal inertia of a coal-fired power station. Background technique [0002] Coal-fired power plants are in the transient process of variable load for a long time. During the process of frequent load lifting and lowering of the unit, due to the large thermal inertia of the coal-fired power plant, the parameter control effect of the unit in the process of variable load is poor, and the temperature and pressure fluctuate strongly. , affecting the operating life and reliability of the unit, and even threatening the operating safety of the unit. The existing variable load commands are often linear variable load commands, but the thermal inertia of coal-fired power stations is the key i...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiment of the present invention is to solve the problem that the existing coal-fired power station has a linear variable load command without considering thermal inertia, which leads to poor unit control effect by making the variable load command of the coal-fired power station satisfy the S-curve function

Images