Experimental Study on the Icing Dielectric Constant for the Capacitive Icing Sensor

Zhu, Youwen; Huang, Xinbo; Tian, Yousheng; Ji, Chao; Cao, Wen; Zhao, Long

doi:10.3390/s18103325

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…Based on the difference in the dielectric constants of air and snow, the author's team proposed an interdigital capacitance sensor‐based online monitoring method for snow on PV modules, which allow continuous monitoring of the snow state on PV modules [39,47]. The designed interdigital capacitance sensor is a planar sensor, which mainly uses the edge effect to detect changes in the physical properties of the surrounding material [48].…”

Section: Sensing Technology For Snow Melting State Accumulation On Pv...mentioning

confidence: 99%

Research Progress of Snowmelt Promotion and Snowmelt Monitoring Technology on Photovoltaic Modules

Zhu,

Li,

Gao

et al. 2024

IEEJ Transactions Elec Engng

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The accumulation of snow is one of the essential reasons for the significant decrease in the power generation efficiency of PV stations in winter. For this reason, this paper firstly provides a detailed review of the current research into the physical processes and shedding reasons for the natural melting of snow on PV module surfaces. Then, several common techniques to promote snow and ice melting on PV surfaces are discussed, and the feasibility and shortcoming of ultrasonic technology in removing high‐density snow and ice are analyzed in detail. Finally, this paper proposes two snow sensing technologies for PV modules, namely, image processing method and interdigital capacitance method. Among them, the image method based on fixed camera and UAV detection is more suitable for wide area PV power stations, while the interdigital capacitance method is helpful in obtaining snow characteristic parameters, such as icing type and LWC. The relevant research has certain reference significance for PV power stations to formulate a more reasonable snow removal plan and power generation forecast. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Section: Sensing Technology For Snow Melting State Accumulation On Pv...mentioning

confidence: 99%

Research Progress of Snowmelt Promotion and Snowmelt Monitoring Technology on Photovoltaic Modules

Zhu,

Li,

Gao

et al. 2024

IEEJ Transactions Elec Engng

Self Cite

View full text Add to dashboard Cite

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“…The authors of Zhou et al (2010) got the relationship of stress and strain for an optical fiber sensing system using linear fitting. The authors of Zhu et al (2018) proposed fitting formula for calculating the relative dielectric constant of the capacitive icing sensor.…”

Section: Introductionmentioning

confidence: 99%

New method for the calibration of a road condition sensor

Yang

2022

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Purpose This study aims to improve the calibration accquracy of the road condition sensor. A road condition sensor is widely used to detect water or ice deposits on the road to assess associated driving risks. Its quantitative calibration is central to the thickness measurement accuracy and conventionally performed using the single fitting method-based calibration method. One existing limitation is that the distribution characteristics of calibration data of different road conditions are diversified, which leads to the fitting error can not be minimized when using the conventional calibration method. Thus, the multiple fitting methods-based calibration method is developed to realize an optimal calibration for the road condition sensor. Design/methodology/approach A fitting method assignment for the calibration data of different road conditions was introduced to realize an optimal combination for fitting method and calibration data. In the experiments, the calibration methods were tested in the absence of measurement errors, then tested with calibration data, and finally, in the covering thickness measurement. Findings The comparison results indicate that compared with the conventional calibration method, the multiple fitting methods-based calibration method cuts the fitting error in the quantitative calibration by 13.3% and contributes to reducing the thickness measurement error by 8.11% for different road conditions. Originality/value The multiple fitting methods-based calibration method has been successfully applied for quantitative calibration and shown to reduce calibration errors. The comparison between different calibration methods demonstrates the superior performance of the new calibration method.

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“…The on-line monitoring and identification technology of icing growth on artificial buildings have been studied for more than ten years, and many effective methods have been proposed, such as tension sensor measurement method [18], [19], image monitoring method [7], [20]- [22], capacitive sensor measurement method [23], [24], and so on. The image monitoring method is one of the most widely used methods at present, which can analyze the icing growth on power insulators through different indicators.…”

Section: Introductionmentioning

confidence: 99%

Research on Image Recognition Method of Icicle Length and Bridging State on Power Insulators

et al. 2019

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Icicle will cause serious distortion of insulator electric field, weaken its voltage strength, and easily cause insulator flashover. Previous studies have shown that the longer the length of icicles on insulator, the greater the possibility of electric flashover. Then, it is of great theoretical significance and practical value to study the image identification technology of icicle length of iced insulators. Firstly, the growth mechanism and structural characteristics of insulator icicles are discussed in this paper, and the image acquisition method of iced insulator is discussed. Secondly, the methods of saliency detection and color feature analysis are used to extract the region of icicle and insulator sheds respectively, then, the icicle structure on insulator is obtained by the difference calculation of above two images. Meanwhile, the pixel curve of the iced insulator image is processed by Fourier transform, and the reference size of insulators icicle is obtained by calculating the length of the shed spacing. Finally, a practical case about iced insulators in substations is analyzed in detail, which proves the effectiveness of the method proposed in this paper.

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Experimental Study on the Icing Dielectric Constant for the Capacitive Icing Sensor

Cited by 8 publications

References 20 publications

Research Progress of Snowmelt Promotion and Snowmelt Monitoring Technology on Photovoltaic Modules

Research Progress of Snowmelt Promotion and Snowmelt Monitoring Technology on Photovoltaic Modules

New method for the calibration of a road condition sensor

Research on Image Recognition Method of Icicle Length and Bridging State on Power Insulators

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