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电网技术  2006 

带并联电抗器的超/特高压输电线路单相自适应重合闸故障性质识别判据

, PP. 29-34

Keywords: 电力系统,超/特高压输电线路,单相重合闸,自由分量,瞬时性故障,永久性故障

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Abstract:

针对带并联电抗器的超/特高压输电线路,提出了通过检测断开相端电压自由分量实现的单相自适应重合闸故障性质识别判据。当自由分量频率可精确计算时,该判据可直接应用于超/特高压输电线路中,且具有较高的灵敏度。若自由分量频率计算误差不超过10%,则该判据应用于超高压输电线路与自由分量频率低于45Hz的特高压输电线路中时可快速准确地判断故障性质。采用频率计算误差补偿算法后,该判据适用于所有的超/特高压输电线路,且灵敏度高,判断速度快。该判据的性能受自由分量频率估算误差的影响。大量仿真实验验证了所得出结论的正确性。

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