摘要
为提升高压不控整流阀的抗雷击性能,这里建立了含二极管、电抗器、变压器和架空线等高压不控整流阀组件的高频等效模型,在此基础上构建高压不控整流阀的雷击过程模型,分析反向恢复电荷约束下的二极管过电压暂态物理过程,剖析高压不控整流阀的雷电过电压暂态特性。采用实验对比方法分析不同二极管等效模型下,串联二极管的雷电过电压分布特性,揭示反向恢复电荷和反向恢复时间对串联二极管电压不均衡的影响机理,为高压不控整流阀在雷击作用下安全稳定运行提供思路。
To improve the anti-lightning striking characteristic of high-voltage uncontrolled rectifier,a high-voltage uncontrolled rectifier system model is constructed,including series diodes,reactor,transformer,and airline.Then,physical mechanism of diode turn-off process and physical model of the diode under the restriction of reverse recovery charge are analyzed to research the transient characteristic of lightning overvoltage in high-voltage uncontrolled rectifier.Moreover,the transient overvoltage characteristic of series diodes is analyzed to present the influence of diode reversed recovery charge and process on the unbalance voltage in series diodes,via compared simulation experiments.Finally,the theory analysis and simulation results can support the safe and stable operation of high-voltage uncontrolled rectifier during lightning striking.
作者
刘国峰
陈满
赵浩君
丁思敏
LIU Guo-feng;CHEN Man;ZHAO Hao-jun;DING Si-min(Stale Grid Nanjing Power Supply Company,Nanjing 210096,China)
出处
《电力电子技术》
北大核心
2023年第9期34-37,共4页
Power Electronics
关键词
串联二极管
不控整流阀
雷电过电压
反向恢复电荷
serious diodes
uncontrolled rectifier
lightning overvoltage
reverse recovery charge
