Observer-based Adaptive Sliding Mode Control of a Switched-Boost Converter for PV System

The energy from the sun is a natural resource that is abundant globally. The decreasing cost of the photovoltaic (PV) modules has made solar PV a viable option for producing clean energy. However, the voltage produced by the panels is intermittent and cannot be used to power loads directly. The panels must be interfaced with a power electronic converter for power regulation. The switched boost converter (SBC) is a hybrid ac/dc topology that can operate like the conventional DC-DC boost converter. In this paper, an observer-based adaptive sliding mode control (ASMC) has been proposed for enhancing the voltage stability of the system. The adaptive mechanism makes the system insensitive to the parametric uncertainties and bounded disturbances. The PI structure sliding surface with a power rate reaching law has been used. A stability analysis has been performed rigorously using the Lyapunov method. The simulations in Simulink demonstrate that the system exhibits robustness by using ASMC.