Application of Sliding-Mode Control Schemes in Three-level Converters

Sliding-mode control strategy has such advantages as robustness, simple algorithm and dynamics performance. Sliding-mode control strategy is for the first time introduced to three-level converters. At first, direct sliding-mode control strategy is presented. Then the design of three-level converters based on direct sliding-mode control strategy is described. In the end, simulation analysis of three-level converters based on direct sliding-mode control, as well the comparison between three-level converters based on direct sliding-mode control strategy and PWM three-level converters strategy is given. Analysis results verify that using the three-level converters based on sliding-mode control strategy, dynamics performance and robustness are improved greatly.