Investigation of Electric and Magnetic Field in the Application of Dynamic Line Rating

Rácz, Levente; Szabó, Dávid; Göcsei, Gábor

doi:10.1007/978-3-030-31676-1_15

Cited by 4 publications

(4 citation statements)

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“…This paper demonstrates that the electric field can exceed the limit value even if the legally defined safety distance is observed in dedicated power lines. For this purpose, the authors performed electric field measurements and numerical simulations several times in the vicinity of an active transmission line on which DLR sensors are installed [27,28]. The measurements were performed in the most critical power line span with regards to ground clearance, in planes perpendicular to the transmission line's longitudinal direction.…”

Section: General Conceptmentioning

confidence: 99%

Dynamic Line Rating—An Effective Method to Increase the Safety of Power Lines

Rácz

Németh

2021

Applied Sciences

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Exceeding the electric field’s limit value is not allowed in the vicinity of high-voltage power lines because of both legal and safety aspects. The design parameters of the line must be chosen so that such cases do not occur. However, analysis of several operating power lines in Europe found that the electric field strength in many cases exceeds the legally prescribed limit for the general public. To illustrate this issue and its importance, field measurement and finite element simulation results of the low-frequency electric field are presented for an active 400 kV power line. The purpose of this paper is to offer a new, economical expert system based on dynamic line rating (DLR) that utilizes the potential of real-time power line monitoring methods. The article describes the expert system’s strengths and benefits from both technical and financial points of view, highlighting DLR’s potential for application. With our proposed expert system, it is possible to increase a power line’s safety and security by ensuring that the electric field does not exceed its limit value. In this way, the authors demonstrate that DLR has other potential applications in addition to its capacity-increasing effect in the high voltage grid.

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Section: General Conceptmentioning

confidence: 99%

Dynamic Line Rating—An Effective Method to Increase the Safety of Power Lines

Rácz

Németh

2021

Applied Sciences

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“…Theoretically, the use of DLR does not violate the legally defined clearances, since the aim of this method is to always maintain the maximum allowable temperature. However, measurement and model errors or control inaccuracies may cause the temperature limits to be exceeded for a short time that need to be treated proper [2][3][4], [8].…”

Section: Fig 2 Visualization Of Sag and Clearance In Case Of A Simpli...mentioning

confidence: 99%

“…The maximum allowable conductor temperature is 40 °C and the static line rating is 530 A for the summer period. Due to legal requirements, most of the spans need to fulfill 7 m as a clearance criterium, but there are some exceptions where 5.5 m is the safety distance [4][5][6][7].…”

Section: Risk Factor Analysis Of Ohl Sagmentioning

confidence: 99%

“…One of these methods is the dynamic line rating (DLR), which is used to calculate the transfer capacity of power lines in real time. While this can significantly increase transmission capacity, several other factors, such as sag and clearances need to be taken more carefully than previously due to potential physiological effects (possible carcinogenesis) of the operating OHLs [1][2][3][4]. The aim of this paper is to present the potential risk of sag-clearance deviation due to the uncertainty of weather forecast within the application of DLR.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Power Line Sag Uncertainty in Day-Ahead DLR Forecast Models

Rácz¹,

Szabó²,

Göcsei³

et al. 2020

IFIP Advances in Information and Communication Technology

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Dynamic line rating method (DLR) is a novel and cost-effective way to extend power overhead lines (OHLs) transfer capacity based on real-time monitoring of the weather parameters in the vicinity of the conductor. Via DLR models not only real-time, but also day-ahead transfer capacity calculation is possible which is more important from the aspect of TSOs. It is important to mention, that these DLR predictions are based on weather forecasts that usually has some uncertainty. The aim of the paper is to identify the potential risk of forecasted power line ampacity due to uncertain weather forecast. To investigate this rarely studied topic, several simulations were carried out applying real power line parameters and forecasted weather data. The results of the simulations showed that under unfavorable weather conditions the uncertainty of the weather prediction could significantly increase the sag of the OHLs if they fully utilized. To monitor the real-time state of the conductor's sag, a novel risk factor calculation method was also investigated that provides additional safety information for the system operators in real time.

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