Research Information System
14th INTERNATIONAL CONFERENCE ON RENEWABLE ENERGY RESEARCH AND APPLICATIONS, Vienna, Austria, 27 - 30 October 2025, pp.1-7, (Full Text)
This paper proposes a unified control strategy com bining Backstepping Control (BSC) with an Enhanced Integral Fast Terminal Sliding Mode Control (EIFTSMC) to address the output voltage regulation problem of single-phase inverters. The approach integrates the smooth tracking and systematic design of BSC with the robustness and fast convergence of EIFTSMC, achieving precise performance under nominal conditions and strong resilience against disturbances and model uncertainties. The proposed EIFTSMC structure has been innovatively de veloped to significantly enhance system stabilization compared to conventional designs. Unlike observer-based methods, the proposed approach eliminates the need for state estimation, re ducing computational complexity. Furthermore, the inverter op erates at a fixed switching frequency without requiring auxiliary techniques, overcoming a common limitation in existing sliding mode control (SMC)-based studies. System stability is analytically verified using Lyapunov methods. Simulation results demonstrate that the proposed controller achieves a rapid dynamic response, low steady-state error, and effective disturbance rejection under various operating conditions. Compared to EIFTSMC, the pro posed structure consistently delivers superior performance across all evaluated metrics.