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 boost-type 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 boost-inverter, it is shown that the outcomes are usually different from the expected desired waveforms. This is because of the non-linear 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.