Control Strategy of Outlet Steam Temperature for DSG in Parabolic Troughs Solar Power Under Recirculation Operation Mode Based on Fuzzy Dynamic Matrix Control

Abstract

The application of proportional–integral–derivative (PID) controllers to outlet steam temperature for direct steam generation (DSG) in parabolic troughs solar power system under recirculation operation mode may not achieve the desired effect due to large time delay, model/plant mismatches, strong inertia and parameter timevariation, which is affected greatly by the changes in solar radiation. In the light of characteristics of the control object mentioned above, the fuzzy dynamic matrix control strategy is proposed to build sub-models under typical conditions and design corresponding controllers. Simulation analysis indicate that there are advantages such as quick response, minimum system output pulsation and small influence of model mismatch compared with the traditional PI and dynamic matrix control (DMC) strategies. Simulation results prove the feasibility and effectivity of the proposed control method.