中文摘要：

提出一种基于主成分分析（PCA）聚类的直流线路全线速动保护,其结合保护安装处测点所获取的极线电流,基于PCA聚类来判断短路故障发生的方向,如果是正向故障,则继续采用PCA聚类来甄别是正向区内还是正向区外故障。仿真结果和实测数据表明,所提保护适应于不同的高压直流输电系统,具有抗雷击干扰和抗谐波干扰的能力。

英文摘要：

An entire- line instant protection based on PCA（ Principal Component Analysis） clustering is proposed for DC line,which identifies the short circuit fault direction based on PCA clustering according to the polar line current acquired by the measuring point at the installation location of protection. If the fault direction is forward,the PCA clustering is still used to detect if it is a forward in-zone or out-zone fault.Simulative results and measured data show that,the proposed protection can adapt to different HVDC systems and resist the lightening and harmonic disturbances.