A cascade multilevel hybrid filter composed of single-phase full-bri dge inverters and three-phase inverter is proposed,in which different power e lectronic devices are used in different inverters without transformer to reduc e size and cost of APF.

• 在所提方案中,单相和三相逆变器采用不同的电力电子器件实现,不需要与逆变器级联的变压器,从而可降低装置的体积与成本。