基于低秩矩阵填充的XLPE电力电缆寿命评估

Low-Rank Matrix Completion Based Lifetime Evaluation of XLPE Power Cable

提出一种基于低秩矩阵填充技术的XLPE电力电缆寿命评估方法。该方法可有效应对传统算法所不能处理的不同厂家对电缆样本检测指标类别不统一导致的小样本寿命评估问题。在本文提出的评估方法中,首先以单一电缆样本检测指标及其寿命为列向量建立信息矩阵。然后,通过将该信息矩阵分解为一个低秩矩阵与一个稀疏的噪声矩阵的方式实现对目标电缆样本的寿命评估。仿真实验验证了该XLPE电力电缆寿命评估方法的准确性与鲁棒性。

In this article, a novel lifetime evaluation method of XLPE power cable is proposed by employing low-rank matrix completion technology. The proposed method can effectively deal with small sample sized life prediction problems, which can not be handled by the traditional algorithms, caused by the disunity on cable test categories of different manufacturers. In the proposed method, an information matrix of power cable insulation state is established with all the indicators and cable life of a single cable sample as a column vector. By dividing the information matrix into a low-rank matrix and a sparse noisy matrix, the tasks of lifetime evaluation of XLPE power cable are complished. Experimental simulation results demonstrate the accuracy and robustness of this proposed method.