Nonlinear control of a photovoltaic battery system via ABC-tuned Dynamic Surface Controller

This paper proposes a control methodology basedon Dynamic Surface Control (DSC) to manage the powerflow of a photovoltaic (PV) battery system. In particular, dueto the inner stochastic nature and intermittency of the solarproduction and in order to face the irradiance rapid changes,a robust and fast controller is needed. Dynamic Surface Controlis a modified version of Backstepping control that avoidsthe explosion of terms, which is a typical drawback of theBackstepping control and furthermore it is not affected bythe well known problem of chattering, which affects SlidingMode controllers. Dynamic Surface Control is compared to theconventional Proportional–Integral–Derivative controller (PID).In particular, DSC shows better performances in terms of steadystate chattering and transient response, as confirmed by theIntegral of the Absolute value of Error (IAE), Integral of theSquared Error (ISE) and Integral of Time multiplied by theAbsolute value of Error (ITAE) performance indexes.