Solid-state Circuit Breaker Based on Cascaded Normally-on SiC JFETs for Medium-voltage DC Distribution Networks  

作　　者：Dong He Haohui Zhou Zheng Lan Wei Wang Jinhui Zeng Xueping Yu Z.John Shen 

机构地区：[1]Chongqing University of Posts and Telecommunications,Chongqing,China [2]Henan Polytechnic University,Jiaozuo,China [3]College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China [4]Hunan University,Changsha,China [5]College of Electrical and Information Engineering,Hunan University,Changsha,China [6]College of Electrical Engineering,Three Gorges University [7]Rensselaer Polytechnic Institute,Troy,NY,USA

出　　处：《Protection and Control of Modern Power Systems》2024年第2期32-46,共15页现代电力系统保护与控制（英文）

基　　金：supported in part by Hunan Provincial Natural Science Foundation of China(No.2021JJ40172).

摘　　要：Solid-state circuit breakers(SSCBs)are critical components in the protection of medium-voltage DC distribution networks to facilitate arc-free,fast and reliable isolation of DC faults.However,limited by the capacity of a single semiconductor device,using semi-conductor-based SSCBs at high voltage is challenging.This study presents the details of a 1.5 kV,63 A medi-um-voltage SSCB,composed primarily of a solid-state switch based on three cascaded normally-on silicon car-bide(SiC)junction field-effect transistors(JFETs)and a low-cost programmable gate drive circuit.Dynamic and static voltage sharing among the cascaded SiC JFETs of the SSCB during fault isolation is realized using the pro-posed gate drive circuit.The selection conditions for the key parameters of the SSCB gate driver are also analyzed.Additionally,an improved pulse-width modulation cur-rent-limiting protection solution is proposed to identify the permanent overcurrent and transient inrush current associated with capacitive load startup in a DC distribu-tion network.Using the developed SSCB prototype and the fault test system,experimental results are obtained to validate the fault response performance of the SSCB.Index Terms—Solid-state circuit breaker,DC distribu-tion network,SiC JFET,voltage balancing,inrush current.

关 键 词：Solid-state circuit breaker DC distribu-tion network SiC JFET voltage balancing inrush current 

分 类 号：TM571[电气工程—电器] TM561