DYNAMIC STOCHASTIC CONTROL MODELS OF A PACKAGE BOILER BY THE CHANNEL "COAL FEEDER ROTATIONS - STEAM CONSUMPTION"
PURPOSE. The purpose of this work is creation of dynamic stochastic control models by the channels “fuel consumption - superheated steam consumption at the boiler plant outlet”. METHODS. The following technology factors have been controlled during the passive experiment: Fsteam - sharp steam consumption out of boiler; fБ - rotation frequency of raw coal feeder (RCF) RCF-Б; fB - rotation frequency of raw coal feeder RCF-В; fг - rotation frequency of raw coal feeder RCF-Г. The methods of correlation and regression analysis have been used to study the effect of coal feeder rotation frequency on steam consumption. RESULTS AND THEIR DISCUSSION. The following dependences of superheated steam consumption at the boiler outlet on the rotation frequency of coal feeders have been obtained: “revolutions of raw coal feeders, Б line - steam consumption”; “revolutions of raw coal feeders, B line - steam consumption”; “revolutions of raw coal feeders, Г line - steam consumption”. A diagnostic check has been used to test the adequacy of the received results to the real process of the influence of coal feeder rotation frequency on superheated steam consumption. The diagnostic check was carried out in two stages: the first stage involved the calculation of -statistics for the values of autocorrelated function of residual mistakes; the second stage involved the calculation of cross-correlation function between previously “leveled” input and residual mistakes. CONCLUSIONS. The conducted researches resulted in the development of models allowing to estimate the influence of coal feeder rotation frequency on steam consumption. The models can be used to predict and control the package boiler load.