一种三电平NPC逆变器IGBT开路判别方法

基金项目:

滨州学院青年人才创新工程科研基金项目(BZXYQNLG201204)

详细信息

A distinguishing method of open-circuit IGBT of three-level NPC inverter

1.
Department of Electrical Engineering, Binzhou University, Binzhou 256603, China
2.
Research Center of Automatic Control, Binzhou University, Binzhou 256603, China
3.
Department of Economics Manageme

摘要: 针对现有三电平NPC逆变器IGBT开路判别方法计算量大的问题，对各种IGBT开路情形进行了仿真，并分析了母线中点电压偏移的原因，进而提出了一种简单的判别IGBT开路的方法。该方法通过检测母线中点电压与逆变器三相输出电流实现IGBT开路判断，无需附加硬件电路。仿真结果验证了该方法的有效性。
- 三电平NPC逆变器 /
- 开路IGBT /
- 功率开关器件 /
- 中点电压平衡
Abstract: For problem of large calculated amount of existing distinguishing method of open-circuit IGBT of three-level NPC inverter, all kinds of open-circuit states of IGBT were simulated, and the causes of bus neutral-point voltage deviation were analyzed, then a simple method to distinguish the open-circuit IGBT was proposed. The method achieves distinguishing of open-circuit IGBT by detecting bus neutral-point voltage and three-phase output voltage of inverter, which needs no extra hardware. The simulation results verify effectiveness of the method.
- three-level NPC inverter /
- open-circuit IGBT /
- power switch device /
- neutral-point voltage balance