Investigation on the control strategy of high power NPC/H-bridge inverter

Large power electronic converters are widely used in the oil and gas transportation, pumped storage and other fields. In order to achieve higher voltage and power, NPC/H-bridge multi-level topology is the most common solution. In this paper, the topology and control strategies of NPC/H-Bridge converter are investigated in details. Finally the PSIM simulation results validate that the control strategy of 3-segment switching pattern has a better performance.