Failure evaluation of outdoor polymeric insulators based on statistical condition-assessment methods

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Electric Power Systems Research Pub Date : 2024-10-09 DOI:10.1016/j.epsr.2024.111134

Navid Fahimi , Mohammad Goudarzi , Amir Abbas Shayegani-Akmal

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Abstract

Field aging of outdoor polymeric insulators results in unscheduled outages in power systems particularly in harsh climate conditions. In this paper, a strategic maintenance framework is proposed in order to prevent overhead line outages. The presented scheme is based on condition assessment of the real aged polymeric insulators. Data of tensile test, hardness test, thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) are used to extract critical features of the aged samples based on classification of fuzzy c-means clustering. Then, a lifetime prediction analysis is done based on Cox hazards analysis to develop further maintenance strategy. The proposed model is validated through numerical analyses on polymeric insulators for various validation evaluations including pollution severity analysis and hydrophobicity class (HC) measurement. Obtained results verify accuracy of the intelligent model to predict lifetime of the aged polymeric insulators. The presented strategic framework can be effectively applied to online monitoring, condition assessment and preventive maintenance programs of the power system utilities.

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基于统计条件评估方法的户外聚合绝缘子故障评估

户外聚合绝缘子的现场老化会导致电力系统意外停电，尤其是在恶劣的气候条件下。本文提出了一个战略性维护框架，以防止架空线路停电。所提出的方案以实际老化聚合绝缘子的状态评估为基础。利用拉伸试验、硬度试验、热重分析（TGA）和傅立叶变换红外光谱（FTIR）的数据，在模糊 c-means 聚类的基础上提取老化样品的关键特征。然后，基于 Cox 危险分析进行寿命预测分析，以制定进一步的维护策略。通过对聚合绝缘体进行数值分析，对提出的模型进行了验证，包括污染严重程度分析和疏水性等级（HC）测量等各种验证评估。获得的结果验证了智能模型预测老化聚合绝缘子寿命的准确性。所提出的战略框架可有效应用于电力系统公用事业的在线监测、状态评估和预防性维护计划。

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.