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2024年6期
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A novel embedded voltage-clamped circuit for multilevel modular converters submodule to suppress very fast transient overvoltage
A novel embedded voltage-clamped circuit for multilevel modular converters submodule to suppress very fast transient overvoltage
摘要
The submodule in multilevel modular converters experiences a very fast transient over-voltage(VFTO)during switch operation of gas-insulated switchgear,which also results in overvoltage on power devices,such as thyristors and insulated gate bipolar transistors(IGBTs).This work presents an embedded circuit that utilises a gap in conjunction with a metal oxide varistor(MOV)to control the voltage of the surge arrester and prevent false triggers during the transient phase when the IGBT is turned off.The mechanism of VFTO is analysed.Moreover,the design idea is suggested and the gap-MOV circuit is constructed.Ultimately,experiments are conducted to validate the effectiveness of the suggested gap-MOV in suppressing overvoltage.
Author：
Hong Shen
Zhonghao Dongye
Mian Xiao
Jiayi Shao
Xiangyu Zhang
Yao Yao
Zifan Dong
Lei Qi
作者单位：
North China Electric Power University,Beijing,China
Electric Power Research Institute,State Grid Hubei Electric Power Co.,Ltd.,Wuhan,China
年，卷(期)：
2024, 9(6)
机标分类号：
TP391.41
F4
F2
在线出版日期：
2025年6月25日
