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Safety Evaluation of Laser-Induced Breakdown Spectroscopy for in-Situ Detection of Surface Contamination on Insulators

Wang, L.; Yang, N.; Huo, P.; Yang, J.; Jiang, F.

2025 6th International Conference on Energy Power and Automation Engineering, ICEPAE 2025: 13-17

2025

ISSN/ISBN: 9798331524586
DOI: 10.1109/icepae66132.2025.11275726
Accession: 104271024

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Summary
Insulators in power systems are critical for ensuring electrical insulation and structural stability, yet surface contamination accumulation poses severe risks of flashover and grid failures. Conventional contamination detection methods exhibit limitations such as low efficiency, limited accuracy, and susceptibility to environmental interference. This study evaluates the application of Laser-induced breakdown spectroscopy (LIBS) as a novel in-situ technique for detecting insulator contamination parameters, including equivalent salt deposit density (ESDD) and non-soluble deposit density (NSDD). LIBS safety has been confirmed by partial discharge tests under operational voltages. No structural degradation, crack propagation, or performance decline have been observed in LIBS-treated insulators after aging experiments. No failure or insulation compromise compared to untreated controls have been observed in mechanical tensile tests (85% rated load) and electrical flashover tests (500 kV impulse). The study results validate LIBS as a safe, efficient, and non-destructive method for real-time insulator contamination assessment, offering significant potential to enhance grid reliability and maintenance efficiency.

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