Abstract
The following paper presents the modeling and design of a backstepping controller based on saturation functions for a single-phase off-grid inverter system. The proposed controller consists of an algorithm that modifies the controller gains as a function of the error, which is intended to avoid the windup effect and to adapt to changes in system parameters, such as inverter load. The objective of the bakstepping controller acting on the system is to reduce the tracking error and improve the voltage quality at the inverter output by reducing the total harmonic distortion. The results of the backstepping controller with saturated gains are compared against backstepping with constant gains in order to test its performance improvement.
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