Liyuan Zheng
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Liyuan Zheng has a total of 1 co-authors. Here are the top co-authors by number of shared publications:
- Danjiang Chen
College of Information and Intelligence Engineering, Zhejiang Wanli University,Ningbo,China
1 shared publication
Latest Publications
- Open Access
- 15 November 2022
- Published by Polish Academy of Sciences Chancellery in Archives of Electrical Engineering
- Vol. 71 (4) , 931-948
Fault-tolerant control for three-phase three-level T-type inverters with a redundant leg
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.
- 15 November 2022
- Published by Polish Academy of Sciences Chancellery in Archives of Electrical Engineering
- Vol. 71 (4) , 931-948
Open AccessFault-tolerant control for three-phase three-level T-type inverters with a redundant leg
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.