冲击电容器对换流站中性母线过电压的影响

Yu Zhang, S. Xie, Chenmeng Zhang, Xuelin Zhao
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引用次数: 1

摘要

为了研究高压换流站中性母线施加冲击电容对过电压的抑制效果,本文以BIN-JIN高压直流输电工程为研究对象,建立了PSCAD/EMTDC内部过电压计算模型。计算分析了不同冲击电容配置方案下,在接地短路故障和阀触发脉冲损耗故障情况下,中性点母线过电压幅值的变化。计算结果表明:安装冲击电容器可显著降低换流站中性母线过电压水平;且冲击电容容量越大,抑制效果越明显;冲击电容器只有在与母线同侧时才对中性母线的过电压有抑制作用。综上所述,可以安装冲击电容来降低内部过电压的水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of impact capacitor on overvoltage in neutral bus of converter station
In order to study the suppression effect of the overvoltage when the Impact capacitor is applied in the neutral bus of the High-voltage Converter station, this paper takes the BIN-JIN HVDC transmission project as the research object and establishes an internal overvoltage calculation model in the PSCAD/EMTDC. The variation of overvoltage amplitude in neutral bus which is in the ground short circuit fault and valve triggering pulse loss fault situation is calculated and analyzed under different impact capacitor configuration schemes. The calculation results showed: installing impact capacitor can significantly reduce the overvoltage level in the neutral Bus of the converter station; and the more the capacity of the impact capacitor increased, the more obvious the suppression effect is; The impact capacitor has a restraining effect on the overvoltage of the neutral bus only when it is on the same side with the bus. To sum up, the impact capacitor could be installed to reduce the level of the inner overvoltage.
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