The increasing energy demands rely heavily on fossil fuels such as coal and natural gas, which have arisen the need for an alternate clean energy. Solar energy becomes the trend in alternate energy sources. But it keeps changing with solar irradiation and ambient temperature, so that it causes power low at the output of photovoltaic (PV) cells and rapid wearing of electronic modules. As the solar cell is a sort of semiconductor, the interaction between the diffusion current ant drift current of semiconductor and the ambient temperature can be reflected in a fractional order (FO) behavior. To increase the efficiency of PV power systems, backstepping controller based on Mittag-Leffler and Lyapunov stability is proposed to enhance the maximum power point tracking (MPPT) of PV system. The designed controller is used to track the generated reference voltage for PV array which is determined under the variable fractional order step size algorithm, so that adjust the duty cycle of the boost converter. MATLAB/Simulink is used to validate the desired result of the proposed controller . In the end, the obtained results confirm the effectiveness of the designed controller and the good performance of MPPT in transient and steady states under weather conditions.
Citation
Youcef Djourni ,
Khatir KHETTAB ,
,(2020), Improved Maximum Power Point Tracking Based on dynamic Error detector via fractional order backstepping Control,1er Conférence Nationale sur la transition energétique en Algérie,Université de M'sila
