Boiler combustion control system and boiler combustion control method

摘要

It is a boiler combustion control system that outputs a fuel correction coefficient that corrects the load demand after feedback correction. A fuel correction coefficient calculation unit that calculates a fuel correction coefficient based on an initial value and a fine adjustment function that defines the ratio of the load demand before and after the feedback correction and the initial value of the relationship between the load demand and the fuel input, and the initial value and the fine adjustment And a reference curve correction unit for outputting a reference curve correction coefficient for correcting the function. The reference curve correction unit is based on a deviation determination unit that calculates a deviation between the measured main vapor pressure and the set main vapor pressure, a period determination unit that obtains a period related to the variation of the deviation, an amplitude determination unit that obtains an amplitude, and a reference curve correction coefficient. It has a reference curve correction coefficient output unit that calculates and outputs based on a curve correction function, and a reference curve correction determination unit that corrects the reference curve correction function when a combination of period and amplitude satisfies a predetermined condition.