Dynamic Matrix Control with Gas Calorific Value Feed-Forward Design for Blast Furnace Gas-Fired Combined-Cycle Gas Turbine

Blast furnace gas-fired combined-cycle gas turbine (BFG-CCGT) is important in the steelmaking industry because it can convert the flue gas of blast furnace into electricity power in a highly efficient way. However, due to the large inertia, strong coupling and nonlinearity characteristics of CCGT, it has difficulties to achieve the ideal control effects. In addition, frequent fluctuations in the calorific value of BFG cause disturbances to the system, degrading the operating performance of the plant. It is thus urgent to develop advanced controllers to achieve flexible and reliable operation of the BFG-CCGT. For this reason, this paper develops a dynamic matrix control (DMC) with BFG calorific value feed-forward for the BFG-CCGT based on the understanding of system dynamic characteristics. Simulation results verify that the proposed DMC can effectively control the BFG-CCGT under variable working conditions and gas calorific value disturbances, providing fast and smooth tracking of the given set values.