韩明明;李清泉;刘洪顺;王冠;赵黎;李斌;

• 1:山东省特高压输变电技术与装备重点实验室(山东大学)

摘要(Abstract)：

混合无功补偿安装在特高压变电站内时,隔离开关(disconnecting switch,DS)闭合时在不同位置产生的特快速暂态波(very fast transients,VFT)受多方面因素影响。在建立混合无功补偿等效模型、传输线理论及变电站简化模型的基础上,应用数学解析方法推导VFT计算表达式,分析线路长度及站内设备等效电容对VFT频率的影响,计算站内不同位置DS闭合时母线长度、分级可控高抗(stepped controllable shunt reactor,SCSR)入口电容变化和架空线路长度对站内各处特快速暂态过电压(very fast transient overvoltage,VFTO)幅频特性的影响。结果表明,混合无功补偿的安装将增大VFTO的振荡频率;气体绝缘设备(gas insulated switchgear,GIS)中DS闭合时分级可控高抗端口的VFTO主要受母线长度影响,其频率随母线的增长而减小,其峰值、主频和主频对应幅值随分级可控高抗入口电容增大而降低;串补内DS闭合时分级可控高抗端口的VFTO频率随其入口电容增大而降低,串补与分级可控高抗之间架空线路长度增加会抑制分级可控高抗端口的VFTO。

关键词(KeyWords)： 混合无功补偿;VFTO;传输线理论;幅频特性;分级可控高抗入口电容

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51507095)~~

作者(Author): 韩明明;李清泉;刘洪顺;王冠;赵黎;李斌;

Email:

DOI: 10.13335/j.1000-3673.pst.2015.12.005

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