Modelling and Control of Brobekk Waste Incineration Plant

Abstract

Model Predictive Control of Brobekk waste incineration plant is the main focus of this master thesis. The motivation for using MPC at Brobekk is primarily to improve the control of the temperature towards the combustion furnace and towards Oslo. The Brobekk plant is connected to Hafslund Fjernvarme through heat exchangers, and where temperature and flow from Hafslund heavily affects the temperatures within the Brobekk Plant. Based on temperature, flow and demand from Hafslund, the control region was divided into two distinct regions, where one of the regions could be divided in to four sub regions. Four separate Model Predictive Control structures were devised and they were all able to successfully control the temperatures towards the combustion furnace and towards Oslo. The transition between the two main regions was also investigated, and the control structure developed seemed to give promising results. For simulations, a model developed in an earlier master thesis was used. This model had to be modified, because some physical modification had been made at Brobekk the last year.