A novel embedded voltage‐clamped circuit for multilevel modular converters submodule to suppress very fast transient overvoltage
Year: 2024
Type: article
Abstract: The submodule in multilevel modular converters experiences a very fast transient overvoltage (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.
Source: High Voltage
DOI: 10.1049/hve2.12510
Authors: Hong Shen, Zhonghao Dongye, Mian Xiao, Jiayi Shao, Xiangyu Zhang, Yao Yao, Zifan Dong, Lei Qi
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,200
Award: G2160526573
OpenAlex ID: W4405283748