Research on a Specific Harmonic Elimination Technique for Step Wave of Cascade Type H Bridge Converters

With the rapid development of power electronic technology, power electronic equipments with inverter devices as the main circuit structure are widely used, producing numerous harmonics and having a harmful effect on power grids and electricity equipments. This paper uses the improved genetic algorithm model and least square optimization model to calculate the switch angle when specific harmonic is eliminated and put forward the auxiliary control strategy to achieve power balance in each H bridge converter unit in a certain period.