- Tytuł:
- Fault-tolerant control for three-phase three-level T-type inverters with a redundant leg
- Autorzy:
-
Chen, Danjiang
Zheng, Liyuan - Tematy:
-
fault diagnosis
fault-tolerant control
open-circuit fault
phase-leg fault
redundant leg
T-type inverter - Pokaż więcej
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Powiązania:
- https://bibliotekanauki.pl/articles/2172799.pdf Link otwiera się w nowym oknie
- Opis:
- Three-level T-type inverters have lower total harmonic distortion in output voltage, higher power density and lower voltage stress of power switches compared with conventional two-level inverters and have been widely used in applications with a wide-power range. Reliability improvement is particularly important for the T-type inverters because of the increased number of power switches and high system complexity. This paper proposes a fault-tolerant topology, which is constructed by adding a redundant leg including halfbridge switches and neutral-point switches connected between the DC bus capacitors and the DC-link midpoint of the conventional T-type inverter. In addition, an after-fault control strategy is proposed based on the results of a fault diagnosis method using bridge voltage. The fault-tolerant control of the open-circuit fault of the power switches and the phase-leg fault can both be achieved by the proposed method. Experimental results are given to verify that the proposed fault-tolerant three-level T-type inverter can output the full voltage level and power during the fault-tolerant operation based on the proposed control strategy.
- Dostawca treści:
- Biblioteka Nauki
Artykuł