DC ice‐melting and temperature variation of optical fibre for ice‐covered overhead ground wire

Jiang, Xingliang; Meng, Zhongju; Zhang, Zhijin; Hu, Jianlin; Lei, Yu-Qing

doi:10.1049/iet-gtd.2015.0324

Cited by 17 publications

(13 citation statements)

References 12 publications

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“…According to the field tests in the station, Jiang et al. analysed the factors which influence CIMC, and concluded that CIMC can be estimated by following formula [80]:

\begin{equation}{I}_c = 3.735\sqrt { - \frac{{{t}_i}}{{{r}_0\ln (1 + \frac{{2d}}{D})}}} - \frac{{{t}_i/({t}_i - {t}_e{\rm{)}}}}{{\ln \left( {1 + 2d/D} \right)}}\end{equation}

where t e is ambient temperature, °C; t i is the ice's surface temperature, °C; d is the ice‐thickness on conductor, mm; D is the diameter of conductor, mm; r o is the resistance of conductor, Ω.…”

Section: Prevention Methods Of Icing Disaster In Gridmentioning

confidence: 99%

Development and prospect of monitoring and prevention methods of icing disaster in China power grid

Dong

Jiang

Yin

2022

IET Generation Trans & Dist

Self Cite

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Icing disaster is one of the most serious threats to power grid security in China. This article provides a brief glance of current China's monitoring and prevention methods of icing disaster (MPI) development status. Despite a late start, China's research and development on MPI have made outstanding achievements, including formation mechanism causing ice disaster, key technologies and characteristics, and anti/de-icing approaches development and application. It is apparent that Chinese scientists and engineers confronted the worldwide problem of anti/de-icing, and put forward a comprehensive solution, which plays a more critical role in icing disaster prevention and reduction of power grid during the past 15 years. The article states that the anti/de-icing devices have been applied successively to severe icing issues. These achievements are leading the world in the development and application of MPI. However, it is only at the extreme ice and snow conditions that can test and verify whether prevention methods are comprehensive and perfect or not. And the authors discovered the application limitations in the existing achievements. The article also discusses the overall development trends of MPI in the areas of key technological and technical breakthroughs and application scenarios etc. These discussions serve as references for MPI's future technological advancement and its ever-expanding applications.

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“…According to the field tests in the station, Jiang et al. analysed the factors which influence CIMC, and concluded that CIMC can be estimated by following formula [80]:

\begin{equation}{I}_c = 3.735\sqrt { - \frac{{{t}_i}}{{{r}_0\ln (1 + \frac{{2d}}{D})}}} - \frac{{{t}_i/({t}_i - {t}_e{\rm{)}}}}{{\ln \left( {1 + 2d/D} \right)}}\end{equation}

Section: Prevention Methods Of Icing Disaster In Gridmentioning

confidence: 99%

Development and prospect of monitoring and prevention methods of icing disaster in China power grid

Dong

Jiang

Yin

2022

IET Generation Trans & Dist

Self Cite

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“…Therefore, uploaded condition monitoring data (such as ambient temperature, humidity, wind speed & direction, ice accretion, conductor temperature etc.) contains timestamp with a larger deviation [34, 35], which could result in the misleading interpretation of the system situation [36, 37].…”

Section: Impact Of Tsa On Power Systemsmentioning

confidence: 99%

Review on GPS spoofing‐based time synchronisation attack on power system

Zhang

Peng

Liu

et al. 2020

IET Generation, Transmission & Distribution

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“…By far, in power transmission system most of the research on ice melting mainly focuses on the thermal melting of iced overhead lines, and methods such as DC melting method, AC melting method, and pulse current melting have been proposed [6][7][8][9]. However, due to differences in energy sources and icing structures, the above methods cannot be directly used to predict the melting time of insulators.…”

Section: Introductionmentioning

confidence: 99%

Study on natural ice-melting process of insulator by thermodynamic analysis

et al. 2022

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Insulator flashover caused by atmospheric icing is a serious accident with high frequency. The flashover risk on insulators during ice-melting process is higher than that during icing accretion process. Therefore, it is of great theoretical significances and engineering value to carry out research on risk prediction methods of ice-melting flashover on insulators. Firstly, this paper presents a thermal balance equation of the iced insulator surface for icing natural melting process and calculates the main influencing parameters of the ice-melting process by thermodynamic analysis. Secondly, this paper extracts the meteorological data from great numbers of on-site ice-melting flashover cases to calculate the meteorological condition with the highest flashover risk. On the basis of this, to judge the state of freezing or melting, a thermodynamic criterion of freezing and melting state is proposed, and the finite element analysis is applied to model iced and non-iced insulators, and the temperature distribution, the wall heat transfer coefficient distribution of the airflow field are analyzed. The results suggest that the local micrometeorological temperature and the heat transfer coefficient have the greatest impact on the ice-melting process of insulators. The structure of insulator will be changed by the covered ice, ended up to a cone-like structure which will weaken the influence of the vortex on the central leeward side. And the heat dissipation and melt characteristics of iced insulator will be quite different from that of non-iced insulator.

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DC ice‐melting and temperature variation of optical fibre for ice‐covered overhead ground wire

Cited by 17 publications

References 12 publications

Development and prospect of monitoring and prevention methods of icing disaster in China power grid

Development and prospect of monitoring and prevention methods of icing disaster in China power grid

Review on GPS spoofing‐based time synchronisation attack on power system

Study on natural ice-melting process of insulator by thermodynamic analysis

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