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Flashovers seriously affect the safe operation of high-voltage transmission lines. The influence of different pollutants on the flashover of insulators differs greatly. For hygroscopic aluminum phosphate, glucose, and other contaminants, the saturated moisture and flashover characteristics can cause flashovers at low humidity. Therefore, it is of great significance to quickly detect the moisture content in the field. In this article, based on the laser-induced breakdown spectroscopy (LIBS) method, the spectral characteristics of aluminum phosphate contamination were studied, and the spectral lines that characterize the content of aluminum phosphate were obtained. The detection limit for phosphorus was calculated according to the calibration curve. The difference in the moisture content of aluminum phosphate contamination also affects the LIBS signal. The atomic spectrum of phosphorus is selected as the analytical spectral lines. Within a certain relative humidity range, spectral data normalization reduces the influence of the moisture content on the mass fraction of aluminum phosphate samples detected by LIBS. The research results are of great significance for the rapid detection of special contamination, such as aluminum phosphate, in actual lines.
Xinran Qin; Fuzeng Zhang; Shaojie Chen; Tingting Wang; Xiao Hong; Xilin Wang; Zhidong Jia. Characterization of Hygroscopic Insulator Contamination via Laser-Induced Breakdown Spectroscopy. IEEE Transactions on Plasma Science 2021, PP, 1 -7.
AMA StyleXinran Qin, Fuzeng Zhang, Shaojie Chen, Tingting Wang, Xiao Hong, Xilin Wang, Zhidong Jia. Characterization of Hygroscopic Insulator Contamination via Laser-Induced Breakdown Spectroscopy. IEEE Transactions on Plasma Science. 2021; PP (99):1-7.
Chicago/Turabian StyleXinran Qin; Fuzeng Zhang; Shaojie Chen; Tingting Wang; Xiao Hong; Xilin Wang; Zhidong Jia. 2021. "Characterization of Hygroscopic Insulator Contamination via Laser-Induced Breakdown Spectroscopy." IEEE Transactions on Plasma Science PP, no. 99: 1-7.
The composition of contamination deposited on transmission line insulators can affect their surface flashover voltage. Currently, there is no rapid on-line method to detect this contamination composition in power grids. In this paper, we applied laser-induced breakdown spectroscopy (LIBS) to analyze contamination on insulator surfaces. Usually, Na and Ca salts are found in contamination along with various sulfate, carbonate, and chloride compounds. As an element’s detection method, LIBS can only measure a certain element content, for example, Ca. The mixture of various compounds with the same cations can influence the LIBS signal. The influence of mixing ratios on the calibration curves and relative spectral intensity was studied via LIBS. Na2CO3, NaHCO3, CaSO4, and CaCO3 samples containing different proportions of Na and Ca were prepared. The linear correlation coefficients (R2) for the Na and Ca calibration curves generated using various mixing ratios were analyzed. The results showed that the mixture ratio did not dramatically affect the linear calibration curves for mixtures containing the same cations. This finding may significantly reduce the difficulty of applying LIBS analysis for complex contamination on insulators. The laser energy density had effects on the spectral characteristics of the measured elements. The partial least-square regression (PLSR) model can improve the accuracy of Na and Ca prediction.
Shan Lu; Xinwei Wang; Tianzheng Wang; Xinran Qin; Xilin Wang; Zhidong Jia. Analysis of Salt Mixture Contamination on Insulators via Laser-Induced Breakdown Spectroscopy. Applied Sciences 2020, 10, 2617 .
AMA StyleShan Lu, Xinwei Wang, Tianzheng Wang, Xinran Qin, Xilin Wang, Zhidong Jia. Analysis of Salt Mixture Contamination on Insulators via Laser-Induced Breakdown Spectroscopy. Applied Sciences. 2020; 10 (7):2617.
Chicago/Turabian StyleShan Lu; Xinwei Wang; Tianzheng Wang; Xinran Qin; Xilin Wang; Zhidong Jia. 2020. "Analysis of Salt Mixture Contamination on Insulators via Laser-Induced Breakdown Spectroscopy." Applied Sciences 10, no. 7: 2617.
Surface pollution deposition in a high voltage surface can reduce the surface flashover voltage, which is considered to be a serious accident in the transmission of electric power for the high conductivity of pollution in wet weather, such as rain or fog. Accordingly, a rapid and accurate online pollution detection method is of great importance for monitoring the safe status of transmission lines. Usually, to detect the equivalent salt deposit density (ESDD) and non-soluble deposit density (NSDD), the pollution should be collected when power cut off and bring back to lab, time-consuming, low accuracy and unable to meet the online detection. Laser-induced breakdown spectroscopy (LIBS) shows the highest potential for achieving online pollution detection, but its application in high voltage electrical engineering has only just begun to be examined. In this study, a LIBS method for quantitatively detecting the compositions of pollutions on the insulators was investigated, and the spectral characteristics of a natural pollution sample were examined. The energy spectra and LIBS analysis results were compared. LIBS was shown to detect pollution elements that were not detected by conventional energy spectroscopy and had an improved capacity to determine pollution composition. Furthermore, the effects of parameters, such as laser energy intensity and delay time, were investigated for artificial pollutions. Increasing the laser energy intensity and selecting a suitable delay time could enhance the precision and relative spectral intensities of the elements. Additionally, reducing the particle size and increasing the density achieved the same results.
Xinwei Wang; Shan Lu; Tianzheng Wang; Xinran Qin; Xilin Wang; Zhidong Jia. Analysis of Pollution in High Voltage Insulators via Laser-Induced Breakdown Spectroscopy. Molecules 2020, 25, 822 .
AMA StyleXinwei Wang, Shan Lu, Tianzheng Wang, Xinran Qin, Xilin Wang, Zhidong Jia. Analysis of Pollution in High Voltage Insulators via Laser-Induced Breakdown Spectroscopy. Molecules. 2020; 25 (4):822.
Chicago/Turabian StyleXinwei Wang; Shan Lu; Tianzheng Wang; Xinran Qin; Xilin Wang; Zhidong Jia. 2020. "Analysis of Pollution in High Voltage Insulators via Laser-Induced Breakdown Spectroscopy." Molecules 25, no. 4: 822.