Optimizing the energy cost function for a wastewater treatment plant model by employing dynamic generation of a two-dimensional reference point

This article presents a study on determining the optimal reference values for two proportional-integral (PI) type controllers taking also into account the impact on a simulated wastewater treatment plant (WWTP). In this regard, we considered a predictive control algorithm for a distributed model, which includes correlation between subsystems. Additionally, we have taken into consideration the comparative testing of two interpolation methods for the purpose of dynamically generating reference points, applied on Benchmark Simulation Model No.2 (BSM2) with an implemented control strategy. This allowed us to determine the global minimum points and propose a method for aligning the global minimum points obtained for both cost functions.