Review of Research on Surface Contamination Characteristics of Composite Insulators

DOI: https://doi.org/10.62517/jes.202602215

Author(s)

Qi Liu*, Chuanqiang Che, Mingzuo Xie, Xuefang Liu, Huijie Jia

Affiliation(s)

Inner Mongolia Power (Group) Co., Ltd., Inner Mongolia Electric Power Research Institute, Hohhot, Inner Mongolia, China *Corresponding Author

Abstract

The accumulation of contamination on the surface of composite insulators is the key cause of its insulation performance degradation and pollution flashover accidents. A comprehensive understanding of pollution components and their electrical effects is the basis for accurate assessment of insulator status. In this paper, the contamination is divided into two categories: soluble and insoluble, and the analysis methods and research progress of the two are systematically reviewed. In terms of soluble substances, the measurement principle, engineering value and limitations of equivalent salt density (ESDD) are described. The application of ion chromatography (IC) and inductively coupled plasma emission spectroscopy (ICP) in the fine analysis of ion and cation components is emphatically introduced, and the quantitative relationship between soluble components and ESDD is discussed. In terms of insoluble, the physical significance of NSDD was summarized, and the progress of X-ray diffraction (XRD) in the identification of contaminated phases and X-ray fluorescence spectroscopy (XRF) and energy spectrum analysis in the study of elemental composition was reviewed. On this basis, the necessity of multi-means joint characterization is emphasized, and the existing problems and future development directions in current pollution assessment are pointed out.

Keywords

Outdoor Insulation; Composite Insulator; Surface Filth; Soluble; Insoluble

References

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