Super-Twisting Sliding Mode Control of Interleaved Boost Converter Based Photovoltaic Applications

Photovoltaic systems (PVS) are one of the most widely used solutions to solve the energy problem due to their many benefits, such as low cost and lack of pollution. However, climatic conditions impact the power generated by the PVS. This study proposes a sliding-mode control with a super-twisting algorithm (ST-SMC) for an interleaved boost converter (IBC) for controlling a PVS. The IBC is used to avoid the disadvantages of the traditional boost-converter. Maximum- power-point-tracking (MPPT) serves to gather the PVS's peak power. It provides the ST-SMC voltage reference, allowing it to track the reference quickly. In addition, an inner loop is comprised of a Proportional-Integral controller utilized to ensure equal current distribution through the inductors. The presented nonlinear controller's performance was validated using the MATLAB/Simulink software. The simulation results verify ST-SMC’s superior performance against solar radiation variation and load disturbances.