Accurate labeling of phase connectivity in electrical distribution systems is important for maintenance and operations but is often erroneous or missing. In this paper, we present a process to identify which smart meters must be in the same phase using a hierarchical clustering method on voltage time series data. Instead of working with the time series data directly, we apply the Fourier transform to represent the data in their frequency domain, remove $98\%$ of the Fourier coefficients, and use the remaining coefficients to cluster the meters are in the same phase. Result of this process is validated by confirming that cluster (phase) membership of meters does not change over two monthly periods. In addition, we also confirm that meters that belong to the same feeder within the distribution network are correctly classified into the same cluster, that is, assigned to the same phase.
翻译:在本文中,我们提出了一个程序,用电压时间序列数据的等级分组方法确定哪些智能米必须处于同一阶段。我们不直接使用时间序列数据,而是使用Fourier变换法来代表其频率域的数据,删除Fourier系数的98美元,并使用剩余系数来对电流进行分组是同一阶段的。通过确认聚集(阶段)成份不会在两个月的时间内变化来验证这一过程的结果。此外,我们还确认,属于分配网内同一进料器的计数被正确划入同一阶段,即分配给同一阶段。