Addressing the inadequacy of existing leakage current suppression techniques in threephase photovoltaic inverters, this technology develops a single-bus isolated bidirectional clamp ten-switch three-phase inverter topology. By adding DC bus isolation switches and clamp circuits, the common-mode voltage during freewheeling is clamped to Ud/3 or 2Ud/3, reducing its variation range and effectively suppressing leakage current, ensuring equipment and personal safety.

Technology provider:Nanjing University of Posts and Telecommunications