Mechanism and suppression of breaking overvoltage of DC circuit breakers  

作　　者：Lu Qu Zhangqing Yu Zhizheng Gan Xin Yan Cheng Jiang Yulong Huang Mingshen Li Jian Feng 

机构地区：[1]Department of Electrical Engineering,Tsinghua University,Beijing,China [2]Sichuan Energy Internet Research Institute,Tsinghua University,Chengdu,Sichuan,China

出　　处：《High Voltage》2025年第1期32-46,共15页高电压(英文)

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:51922062,52241701。

摘　　要：The occurrence of breaking overvoltage in a DC circuit breaker(DCCB)poses a potential threat to the safe operation of a DC grid.Based on the structure of the�10 kV three-terminal DC distribution network,this paper sets up the medium-voltage DCCB and formulates a fault protection strategy.Additionally,a simulation model of the system is developed to analyse the overvoltage characteristics within the DC distribution network across different nodes and fault conditions.By examining the factors that influence breaking overvoltage,this paper unravels the fundamental mechanisms associated with DCCB-related overvoltage generation.Furthermore,the paper suggests measures to alleviate DCCB overvoltage.These insights provide a theoretical and technical basis for the design and operation of DCCBs within DC distribution networks.

关 键 词：BREAKING DISTRIBUTION INSIGHT 

分 类 号：TL6[核科学技术—核技术及应用]