Support vector regression-based distortion compensator for three-phase DC??AC boost-inverters: analysis and experiments

Distortion existence in output of power electronics DC??AC converters is inevitable. The amount of distortion in boosttype converters is higher than other types, which is difficult to mitigate. This study introduces a new modification of three-phase boost-inverters in order to mitigate excessive distortions. The compensation process is modified to take advantage of non-linear operation of boost converters and a differential connection of DC??DC converters is employed. Considering DC??AC boostinverter, it is shown that the outcomes are usually different from the expected desired waveforms. This is because of the nonlinear structure of the switching converter. Thus, a compensation method based on support vector regression (SVR) is proposed in a way that the desired waveforms appear at the output of the converter. Analysis and simulations are first introduced for defining the limitations of a boost-inverter because of the non-linear structure. Then, the simulated SVR applied to the external-layer control, comparing the effects of the suggested algorithm with those of the uncompensated cases. Furthermore, practical verification is taken place on an implemented 500 VA boost-inverter in order to confirm the proposed technique as well as theoretical analysis and simulations. The proposal is particularly useful when considering high penetration of inverter-based interfaces for renewable energy sources such as solar panels.