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电网技术  2012 

1100kV特高压直流换流站过电压保护和绝缘配合

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Keywords: 特高压直流输电,±1,100,kV,换流站,避雷器,过电压保护,绝缘配合,绝缘水平

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Abstract:

为合理确定±1100kV特高压直流换流站的绝缘水平,基于准东—成都±1100kV特高压直流输电工程,根据特高压换流站的绝缘配合方法,对准东换流站的绝缘配合进行了研究。根据特高压直流换流站避雷器布置基本原则,并结合现有±800kV特高压直流换流站的绝缘配合经验,提出了±1100kV准东换流站的避雷器布置方案,详细分析了换流站交流侧、阀厅、直流母线和中性母线等不同区域的过电压保护策略,最后根据推荐的设备绝缘裕度确定了换流站设备的绝缘水平,直流侧1100kV直流极线的雷电冲击和操作冲击绝缘水平推荐为2600kV和2150kV;直流极线平波电抗器阀侧设备和高压端Y/Y换流变阀侧设备的绝缘水平建议取为一致,雷电冲击绝缘水平和操作冲击绝缘水平分别为2500kV和2250kV。研究结果对换流站设备的选型和制造具有重要指导意义,将为该特高压工程建设提供重要依据。

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