Fault-tolerant control for three-phase three-level T-type inverters with a redundant leg

• Autorzy: Chen Danjiang , Zheng Liyuan

Identyfikatory

DOI

10.24425/aee.2022.142117

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

fault diagnosis; fault-tolerant control; open-circuit fault; phase-leg fault; redundant leg; T-type inverter

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2022
• Tom: Vol. 71, nr 4
• Strony: 931--948
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wz.

Twórcy

autor

Chen Danjiang

• College of Information and Intelligence Engineering, Zhejiang Wanli University, No. 8, South Qian Hu Road, Ningbo, Zhejiang, China 315100

• https://orcid.org/0000-0001-6740-7487

autor

Zheng Liyuan

• College of Information and Intelligence Engineering, Zhejiang Wanli University, No. 8, South Qian Hu Road, Ningbo, Zhejiang, China 315100

• https://orcid.org/0000-0001-7937-2509

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).