Sliding Mode Based Control of Five Cascaded H-Bridge Inverters

摘要

This paper introduces the modeling of a DC-AC conversion system regulated with a sliding mode controller (SMC). The DC-AC nonlinear system contains five cascaded H-bridge inverters, an LC filter and DC voltage sources. This structure is able to generate eleven voltage levels, leading to reduce the dimensions of the LC filter. The main concern of this study leans on the deliverance of sinusoidal voltages with a low total harmonic distortion (THD). The AC generated voltage can be used in uninterruptible power supply systems (UPS) as well as in high power-demanding applications; such as electric vehicles (EVs). The performance of the studied system is tested via MATLAB / SIMULINK/ SimPowerSystems environment. The obtained simulation results prove that the proposed controller meets its objectives and demonstrate the efficiency and robustness of the chosen control strategy.