Control of Power Electronic Converters
Technical Dialogue Session
Three-level converter , dc distribution, ZCS
A hybrid resonant three-level ZCS converter suitable for medium voltage dc distribution network is proposed, which can be obtained by adding a control circuit into the traditional neutral point clamped (NPC) three-level (TL) circuit with a fixed duty cycle. Pulse width modulation is adopted for the control circuit to realize zero-current-switching for the basic NPC TL circuit under full load range. As a result, the switching loss can be reduced significantly.