多判据融合的配电网谐振接地系统单相接地故障选线方法

摘要

利用配电网谐振接地系统单相接地故障的零序电流经广义S变换得到时频矩阵，提取奇异值和、能量矩以及相角综合相似性系数这3种互补且能更准确表征故障特征的特征量，利用K中心点聚类方式进行多判据融合选线。仿真结果表明，该故障选线方法能够适用于不同工况，选线准确率和可靠性较高。%By using the generalized S-transform of the zero-sequence current of the single-phase-to-ground fault in the distribution network,the singular value sum,energy-torque and phase angle comprehensive similarity coefficients are extracted,which are complementary and more accurately characterize the fault features And the K-center clustering method is used to fuse the selected line. The simulation results show the proposed fault line selection method can be applied to different conditions with high selection accuracy and reliability.