A Development of New Three-Level NPC Inverters Based on Phase Individual DC-Link and Optimal Dead-Time Configuration
| Title | A Development of New Three-Level NPC Inverters Based on Phase Individual DC-Link and Optimal Dead-Time Configuration |
| Publication Type | Conference Paper |
| Year of Publication | 2009 |
| Authors | Jian, L, Xianggen YIN, Zhang Z, XiongQing |
| Conference Name | Proceedings of the 44th International Universities Power Engineering Conference |
| Date Published | September |
| Conference Location | University of Strathclyde |
| Keywords | Power Electronics and Devices Power Quality and Power Electronic Applications |
| Abstract | Because of the existence of reverse recovery time of power diodes, the clamp diodes and di/dt-chokes diodes of three-level natural point camped (NPC) inverter will enter the reverse recovery region at the same time, the partial over-circuit phenomena will occur at the inductive or capacitive load condition. This problem limits the output power of inverter system and do harm to the power devices. To avoid this over-current problem, a new circuit implementation of 6kV three-level NPC inverter based on three phase individual DC-Link is presented. Using this new circuit the partial over-current problem of traditional three-level NPC inverter can be solved. At the same time, the optimal dead-time configuration of PWM control technology is presented. In this paper, the performance analysis, parameter selection and test circuit of the new inverters are analyzed in detail. After using those methods, the security and stability of system operating have been enhanced obviously. At last, some experimental results have been presented and discussed. |
