CONTROL OF BIOMASS BOILER WATER TEMPERATUR USING SLIDING MODE CONTROL SYSTEM

Abstract

Medium scale biomass temperature control is a
specific field of control issues where one of the most
important features is cost effectiveness. It means that any
kind of control system improvement should be done with
the lowest possible additional costs. Generally, the basic
control of such kind of boiler regulates temperature of
outlet heating water. This control can be also performed by
a conventional or advanced control.
Although the main problem of this study is the construction
of the model of biomass boiler for control purposes, our task
deals with technology of boilers and principles of its inner
processes as well. Creation of the model comes out not only
from these important findings, but also from experimental
data collected during measurements in real operation. Heat
and mass balance calculations were made according to these
data and they serve to precise dynamic properties of
experimental unit for biomass combustion.
Based on the derived mathematical model of the biomass
boiler, here is possibility to enhance the control by
additional algorithms that are responsible for extended
optimization functions. In this paper, an advanced process
control such as sliding mode control system (SMC) is used
to control the temperature of the boiler water. The results
show that SMC has strong immunity for the disturbance
and the varying of process parameters.