Design of a Fast Power Reaching Law-Based Integral Robust Backstepping Sliding Mode Controller for Grid-Tied PV Systems

For a grid-connected single-phase inverter solar photovoltaic (PV) system interfaced with an LCL filter, a fast power reaching law-based integral robust backstepping sliding mode controller is proposed. It's worth noting that, instead of the L filter, an LCL filter is employed to increase the injected power quality. The LCL filter, on the other hand, will generate a resonance problem. To deal with this, the proposed controller is built with the external disturbance factored into the mathematical model. Following that, the proposed approach is used to produce the control rule, and the overall stability of the system is ensured using the well-known Lyapunov theory. Finally, a simulation analysis is undertaken under various solar irradiance fluctuations to validate the utility of the proposal. To demonstrate the new controller's superiority, the performance of the proposed controller is compared to that of the present controller in terms of injected grid currents and total harmonic distortions (THDs).