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Bidirectional Supercascode High-Voltage DC Solid-State Circuit Breaker With Sensorless Current–Time Configuration
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DOI：10.1109/TIE.2023.3321978.png)
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Abstract
En 中文
This article presents a bidirectional normally-on SiC junction field-effect transistor (JFET) based supercascode high-voltage dc solid-state circuit breaker (BSC-SSCB) with sensorless current-time configuration. A sensorless detection-driving circuit (DDC) is proposed to detect the current and drive the main switch by directly utilizing the forward voltage of the BSC-SSCB. The DDC only contains a few passive components and a low-voltage MOSFET, whereas no high-voltage input or high-isolation auxiliary power supply is used. In addition, the current-time tripping response can be configured by only setting two resistors and two capacitors of the DDC without additional controllers. The configurable current-time tripping response enables the BSC-SSCB to avoid unnecessary breaking-off caused by impulse current. A design procedure for the DDC and the main circuit is carried out. A 4-kV/15-A BSC-SSCB prototype is designed and tested. Simulation and experimental results show that the proposed BSC-SSCB can quickly break off the fault current and achieve balanced voltages of all power JFETs. The current-time tripping curve can be fine-configured, which agrees with theoretical analysis. The results indicate that the proposed BSC-SSCB can be applied to medium-voltage dc for fast circuit breaking.
Keywords:
Voltage
JFETs
High-voltage techniques
Gate drivers
Capacitors
Topology
Resistors
Current-time tripping
medium-voltage dc (MVdc)
solid-state circuit breaker (SSCB)
Journal
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7.2
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1.8W
Citations:
9.8W