Control of Boost Converter Using Observer-Based Backstepping Sliding Mode Control for DC Microgrid

The output voltage of a photovoltaic (PV) system relies on temperature and solar irradiance; therefore, the PV load cannot be connected directly. To control voltage, DC-DC boost converter is required. However, regulating this very complicated problem due to its non-linear time-variant non-minimum phase circuit. Furthermore, becomes more challenging uncertainty about variation in load, which disturbance. In study, an observer-based backstepping sliding mode (OBSMC) proposed regulate converter. input can DC energy source such as PV-based microgrid systems. An adaptive scheme controller constructed from dynamic model used design observer. This observer estimates unmeasured states inductor current, capacitor voltages cell, loads that does not need any sensors. addition, technique has been combined with SMC make stable robust. Lyapunov direct method employed ensure stability method. By employing configuration, performance was improved. verify effectiveness controller, numerical simulation conducted. results show always able accurately follow desired robustness, fewer steady-state errors, smaller overshoot, faster recovery time, transient response time. consistently produces least value integral absolute error.