Review on flashover risk prediction method of iced insulator based on icing monitoring technology

Zhu, Youwen; Zhou, Ruiwen; Zhang, Ye; Dong, Xinsheng; Huang, Xinbo

doi:10.1016/j.coldregions.2021.103252

Cited by 21 publications

(7 citation statements)

References 26 publications

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“…Alternatively, in the case of freezing rain, there is a possibility of forming a very dense glaze icing or hard rime layer on PV modules. The data of PV power stations showed that the probability of glaze icing accumulation on PV modules is lower than that of snow, but it is very difficult to remove glaze icing manually and mechanically due to the strong adhesion [36,37]. Therefore, the authors try to use ultrasonic deicing technology to remove high-density ice and snow on PV modules, and analyze the feasibility of this method.…”

Section: Ultrasonic Deicing Methodsmentioning

confidence: 99%

“…Research on snow monitoring technology of PV modules is essential for the power generation efficiency prediction and maintenance strategy of PV power stations in remote areas [9,39,40]. Andrews, Aarseth, and the author of this paper have focused on the snow state sensing technology on PV modules, and explored monitoring schemes based on gravity sensors [9], temperature sensors [40], surveillance cameras [9,39], UAVs [37,41,42], and interdigital capacitances [39]. The above methods shall be selected according to specific application scenarios, based on their significant differences in measurement accuracy, universality, maturity, environmental adaptability and price.…”

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

confidence: 99%

“…These devices generally consist of cameras, sensor sets, image processing modules, integration processing units, communication modules, power control modules, etc. The video monitoring equipment can accurately analyze the images of icing and snow on electrical equipment in harsh environments, and then send the results to the data center for staff to view and analyze [37,43]. Similarly, the video online monitoring device can also monitor the abnormal state of PV modules.…”

Section: Snow Sensing Technology Of Pv Modules Based On Image Process...mentioning

confidence: 99%

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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: Ultrasonic Deicing Methodsmentioning

confidence: 99%

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

confidence: 99%

Section: Snow Sensing Technology Of Pv Modules Based On Image Process...mentioning

confidence: 99%

See 1 more Smart Citation

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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“…Ice shedding on overhead conductors is a low-frequency, large-amplitude vibration phenomenon that can cause transmission line destruction, conductor strand breakage, conductor interphase flashovers, damage to metal fixtures, pendant insulator clamp slippage, spacer bar fractures, transmission tower crossbar distortions, and loosening of tower bolts [3,4]. In serious cases, it can cause conductor fracture and tower collapse, resulting in wide-scale power supply interruptions, jeopardizing the stability and continuous operation of a power grid [5,6]. There are many factors affecting the ice shedding and jumping height of overhead lines, and the influencing factors are related to each other [7].…”

Section: Introductionmentioning

confidence: 99%

Study on the Bouncing Process Induced by Ice Shedding on Overhead Conductors under Strong Wind Conditions

Dong,

Zhao,

et al. 2024

Applied Sciences

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Strong winds can lead to more complex ice shedding oscillation processes for overhead conductors, inducing flashovers, strand breakages and other accidents. This study analyzes the aerodynamic parameters of several typical icing features and establishes a numerical model for ice shedding on overhead conductors under strong wind conditions. The results show that for the same amount of icing, the resistance and lift force on the conductor changes with ice shape, wind attack angle and wind speed, which has a significant effect on the ice shedding jumping process. When the wind attack angle approaches 180°, the airflow resistance of the fan-shaped and D-shaped icing conductors significantly increases. And in the process of ice shedding response of transmission lines, the lateral amplitude may exceed 20 m, which increase the discharge risk of horizontally arranged conductors. Moreover, for the significant lateral oscillation of conductors by ice shedding under strong wind, the maximum horizontal displacement is approximately 1.6 times the difference in lateral position before and after ice shedding.

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“…Use of RTV (room temperature vulcanizing) coatings with conductive additives for anti-icing applications has been reported in previous references. [12][13][14][15][16][17][18] Employing the semiconducting glazed insulators in polluted regions have also been described due to the generation of a limited leakage current on the insulator surface. 19 In, 9 silicone rubber integrated with carbonaceous nanoparticles has been applied as a coating of high voltage porcelain insulators.…”

Section: Introductionmentioning

confidence: 99%

Production and an advanced model for electrical conductivity of silicone rubber/carbon nanotube nanocomposites as outdoor insulator housing material

Mohammadnabi

Rahmani

2023

Journal of Composite Materials

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Considerable cause of the condensation mechanism of moisture and fog on the contaminated high-voltage insulator surface is the temperature difference between the insulator surface and the dew point which eventuate owing to the mechanism of radiative cooling. Condensation of moisture leads to creating a conducting path on the insulator surface and make the insulator to be a conductor and results in the electrical transmission line failure. In order to cover the above-mentioned temperature difference, carbon nanotubes (CNTs) are being applied to the silicone rubber which is the insulator housing material. This study is based on joule heating generation which decrease the electrical resistance of the high-voltage insulator surface. An advanced mathematical model which is based on Pukanszky formulation for estimation of composite tensile strength was presented for the effectual electrical conduction of silicone rubber - carbon nanotube nanocomposite (SCNT). SCNT samples were produced by the addition of dissimilar CNT concentrations to a high temperature vulcanizing (HTV) silicone rubber by solution-blending method. Comparison between experimental results and theoretical forecasts showed an excellent agreement. The obtained model disclosed that the lower ranks of tunneling resistivity and distance, the higher magnitudes of tunneling diameter, the higher concentration of longer and thinner CNTs, lower CNT curliness, higher fraction of networked CNTs, and deeper interphase can produce the maximum level of SCNT conductivity.

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Review on flashover risk prediction method of iced insulator based on icing monitoring technology

Cited by 21 publications

References 26 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

Study on the Bouncing Process Induced by Ice Shedding on Overhead Conductors under Strong Wind Conditions

Production and an advanced model for electrical conductivity of silicone rubber/carbon nanotube nanocomposites as outdoor insulator housing material

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