Boiler heat storage coefficient measurement method and boiler heat storage coefficient measurement device

Abstract

The embodiment of the invention discloses a boiler heat storage coefficient measurement method and a boiler heat storage coefficient measurement device. The measurement method comprises the following steps: acquiring boiler measuring point data; and processing the boiler measuring point data based on a hybrid model which is established by a mechanism model and takes the boiler measuring point data as input and takes the compensation result obtained by performing deviation compensation on the output data of the mechanism model as the output by employing the hybrid modeling technology, and calculating to obtain the boiler heat storage coefficient so as to improve the calculation precision of the boiler heat storage coefficient, wherein the mechanism model is a mathematical model established by performing mechanism analysis on the boiler measuring point data and the boiler heat storage coefficient according to the energy conservation law in advance.

Description

technical field [0001] The invention relates to the technical field of thermal parameter measurement, and more specifically, relates to a method and device for measuring heat storage coefficient of a boiler. Background technique [0002] As a kind of coal-fired generating set, the thermal power unit is widely used in the primary frequency regulation process of the power grid, that is, affected by the load change of the power grid, the frequency of the power grid changes, and the speed regulation system of the thermal power unit uses the energy storage of the unit to adjust the output of its own unit. power to adapt to changes in the grid load and limit changes in the grid frequency within a certain range. [0003] Boiler heat storage is a main parameter used to reflect the energy storage size of the unit, and refers to the effective heat stored or released by the boiler when the unit pressure changes. The key to measuring the heat storage capacity of the boiler is to measur...

AI Technical Summary

Problems solved by technology

The key to measuring the heat storage capacity of the boiler is to measure the heat storage coefficient of the boiler. In the prior art, some uncertain factors in the measurement process are generally simplified, and the data of the measuring points related to the heat storage coefficient of the steam drum (that is, the steam drum measurement point data) into the theoretical algorithm for calculating the heat storage coefficient of the steam drum derived from the principle of energy conservation, and calculate the heat storage coefficient of the boiler according to the empirical value that the heat storage coefficient of the steam drum accounts for about 90% of the heat storage coefficient of the boiler. There is a certain deviation between the measured boiler heat storage coefficient and its true value, and the measurement accuracy is not high

Images