A DC Solid-State Circuit Breaker Based on Transient Current Commutation
| Autor: | Reza Kheirollahi, Hua Zhang, Fei Lu, Shuyan Zhao |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | IEEE Journal of Emerging and Selected Topics in Power Electronics. 10:4614-4625 |
| ISSN: | 2168-6785 2168-6777 |
| Popis: | This paper proposes a new dc solid-state circuit breaker (SSCB) based on silicon carbide (SiC) MOSFETs. There are two main contributions. First, a transient current commutation (TCC) is obtained in the main switch during current interruption. To achieve this, a compact and fast active injection circuit (AIC) is employed. TCC brings two main benefits: 1) it eliminates the effects of parasitic inductances in circuit connections and removes voltage oscillations on the gate of the main switch, which prevents spurious turn-on; 2) it eliminates the transient power shock on the switch during turn-off, which extends the life-time of SSCB and increases its reliability. Second, the voltage on the employed metal oxide varistor (MOV) is reduced to zero during the off-state. This extends the maximum allowable dc bus voltage on the SSCB and solves the MOV reliability issue in the SSCBs. The presented SSCB employs a time-sequence control and needs no real-time detections of the dc current, which simplify the design. LTspice simulations of 380 V/80 A and 600 V/80 A are presented, and the results are compared with MOV based SSCBs and MOV resistor-capacitor-diode (MOV-RCD) based SSCBs. Also, experiments of a 380 V/80 A prototype validate the effectiveness of the proposed SSCB in practice where the voltage on the SSCB is clamped to 721 V with a fixed response time of 9.4 μs. |
| Databáze: | OpenAIRE |
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