Abstract
For this paper, the problem of energy/voltage management in photovoltaic (PV)/battery systems was studied, and a new fractional-order control system on basis of type-3 (T3) fuzzy logic systems (FLSs) was developed. New fractional-order learning rules are derived for tuning of T3-FLSs such that the stability is ensured. In addition, using fractional-order calculus, the robustness was studied versus dynamic uncertainties, perturbation of irradiation, and temperature and abruptly faults in output loads, and, subsequently, new compensators were proposed. In several examinations under difficult operation conditions, such as random temperature, variable irradiation, and abrupt changes in output load, the capability of the schemed controller was verified. In addition, in comparison with other methods, such as proportional-derivative-integral (PID), sliding mode controller (SMC), passivity-based control systems (PBC), and linear quadratic regulator (LQR), the superiority of the suggested method was demonstrated.
Highlights
Today, photovoltaic (PV) panels are extensively used for energy production, due to their renewability, availability, and clarity [1,2]
A new control approach considering T3-fuzzy logic systems (FLSs) and fractional-order calculus was developed for voltage/power management in PV/battery systems
The uncertain time-varying dynamics are online-modeled by the suggested fractional-order T3-FLS
Summary
Photovoltaic (PV) panels are extensively used for energy production, due to their renewability, availability, and clarity [1,2]. When it comes to system control, the main factors that should be fully considered are: the influence of the irradiation, temperature, measurement errors of currents of PV/battery and output voltage, mathematical dynamics uncertainties, and dynamic perturbation, such as variable output load. It was shown that fractional-order controllers result in effectively better control proficiency in comparison with the integer-order counterpart [13,14,15] This control approach has rarely applied on PV/battery systems, and only some simple fractional-order controllers with no stability guarantee have been developed. In Reference [19], the fractional-order PID controller is designed for power flow control between battery, PV panel, and output load, and its superiority versus a conventional PID is studied. New combustors are proposed such that the robustness to be guaranteed
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