Modeling the overhead line vulnerability to combined wind and snow loads for resilience assessment studies

2021 ◽  
Author(s):  
E. Ciapessoni ◽  
D. Cirio ◽  
G. Pirovano ◽  
A. Pitto ◽  
F. Marzullo ◽  
...  
Keyword(s):  
Overhead Line ◽  
Snow Loads ◽  
Resilience Assessment

scholarly journals 50-year return-period wet-snow load estimation based on weather station data for overhead line design in France

2014 ◽  
Vol 14 (11) ◽  
pp. 3031-3041 ◽  
Author(s):  
H. Ducloux ◽  
B. E. Nygaard
Keyword(s):  
Return Period ◽  
Meteorological Data ◽  
Practical Method ◽  
Overhead Line ◽  
Wet Snow ◽  
Peak Over Threshold ◽  
Characteristic Values ◽  
Weather Stations ◽  
Snow Loads ◽  
Line Design

Abstract. Historically, as far as wet-snow loads were concerned, overhead line design was often based on experience or long-term applications with positive results. New standard like CENELEC EN 50341-1 (2012) take into account characteristic loads, i.e. 50-year return-period loads, for the overhead line design. This article proposes a method to estimate characteristic wet-snow loads based on meteorological data recorded at weather stations. The model used to calculate those loads is mainly inspired by a recent article written by Nygaard et al. (2013a) in which a new parameterization is proposed for the classical cylindrical wet-snow accretion model, as described in ISO 12494 standard (2001), annex C. After a complete description of the model and its parameterization adapted to French wet-snow events, the statistical issues are examined. Then, the model is used with the meteorological data of 87 weather stations in order to calculate wet-snow loads whose relevance has been positively tested according to real damages recorded in a complete wet-snow event database. At last, the characteristic loads of those 87 stations have been determined according to all the loads generated by the model and processed by a peak-over-threshold (POT) method. A practical method to determine the 90% confidence intervals of those characteristic values is given. As it is demonstrated that there is only one value of the ice class (IC) masses proposed by ISO 12494 in each confidence interval, characteristic loads can be easily expressed in terms of ICs. That method shows that ICs ranging from R1 (0.5 kg m−1) to R5 (5 kg m−1) could be used for overhead line design in France.

scholarly journals 50 years return period wet-snow load estimation based on weather station data for overhead line design purpose

2014 ◽  
Vol 2 (8) ◽  
pp. 5139-5170
Author(s):  
H. Ducloux ◽  
B. E. Nygaard
Keyword(s):  
Return Period ◽  
Meteorological Data ◽  
Overhead Line ◽  
Threshold Method ◽  
Wet Snow ◽  
Peak Over Threshold ◽  
Peak Over Threshold Method ◽  
Weather Stations ◽  
Snow Loads ◽  
Line Design

Abstract. Historically, as far as wet-snow loads were concerned, overhead line design was often based on experience or on long-term applications with positive results. New standards like CENELEC EN 50341-1 (2012) take into account for the overhead line design characteristic loads, i.e. 50 years return period loads. This article proposes a method to estimate characteristic wet-snow loads based on meteorological data recorded at weather stations. The model used to calculate those loads is mainly inspired by a recent article written by Nygaard et al. (2013a) in which a new parameterization is proposed for the classical cylindrical wet-snow accretion model as described in ISO 12494 annex C. After a complete description of the model and its parameterization adapted to French wet-snow events, the statistical issues are examined. Then, the model is used with the meteorological data of 87 weather stations in order to calculate wet-snow loads whose relevance has been positively tested according to real damages recorded in a complete wet-snow event database. At last, the characteristic loads of those 87 stations have been determined according to all the loads generated by the model and processed by a POT (Peak Over Threshold) method.

National Resilience Assessment Scale

2019 ◽  
Author(s):  
Shaul Kimhi ◽  
Yohanan Eshel ◽  
Mooli Lahad ◽  
Dimitry Leykin
Keyword(s):  
Assessment Scale ◽  
Resilience Assessment

Calculating the Capacitive Current Flowing Off from an Overhead Power Line Energized with the Voltage Induced by the Influencing Overhead Line Located at Different Distances from the Former

Vestnik MEI ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 37-43
Author(s):  
Ilya V. Korolev ◽  
◽  
Olga S. Shcherbacheva ◽  
Victor T. Medvedev ◽  
Dmitriy A. Burdyukov ◽  
...  
Keyword(s):  
Power Line ◽  
Overhead Line ◽  
Capacitive Current ◽  
Overhead Power Line

Development of a Stand for Demonstration of Human Injury by Touch and Step Voltages Near a 10 kV Overhead Line

Vestnik MEI ◽  
2020 ◽  
Vol 6 (6) ◽  
pp. 39-45
Author(s):  
Ruslan K. Borisov ◽  
◽  
Sergey S. Zhulikov ◽  
Sergey I. Khrenov ◽  
Yuliya S. Turchaninova ◽  
...  
Keyword(s):  
Electric Shock ◽  
Research University ◽  
Moscow Region ◽  
Experimental Investigations ◽  
Clear Understanding ◽  
Overhead Line ◽  
Electric Networks ◽  
Calculation Results ◽  
High Voltage Engineering ◽  
Human Injury

An objective to develop a labor protection engineering stand was set forth as part of the research and development work "Carrying out theoretical and experimental investigations and development of stands for demonstrating the danger of electric shock at a training ground" for visually demonstrating the danger of injuring a person by touch and step voltages in 3…35 kV medium voltage electric networks. The technical solutions for practically implementing the stand were adopted based on an analysis of regulatory documents, conditions under which dangerous touch and step voltages occur, the most typical human injury cases, and calculation results. Specialists of the National Research University Moscow Power Engineering Institute Department of High Voltage Engineering and Electrophysics, working jointly with specialists of PJSC Rosseti Moscow Region have developed, manufactured, tested, and put into operation a stand for demonstrating human injury by the touch and step voltages when a 10 kV wire falls on the ground, on a car, and when a fault of a live wire on the overhead line support occurs. With the stand having been put in use at the PJSC Rosseti Moscow Region Training Center Ground, this will allow the staff to form a clear understanding of the electric shock danger, to focus on the effects caused by voltage and current, and thereby significantly reduce electrical injuries.

The choice of optimum cross section for overhead line by economic intervals' method

2011 ◽  
Vol 28 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Svetlana Guseva ◽  
Lubov Petrichenko
Keyword(s):  
Cross Section ◽  
Current Density ◽  
Uncertain Information ◽  
Overhead Line ◽  
Market Conditions ◽  
Overhead Lines ◽  
Mathcad Software

The choice of optimum cross section for overhead line by economic intervals' methodIn this paper an approach to choosing the optimum cross section for overhead line in conditions of incomplete and uncertain information is considered. The two methods of such choice are presented: method of economic current density and economic intervals' method. The correction of the economic intervals method is offered under market conditions of costs. As example 20 kV and 110 kV overhead lines with aluminum, copper and ferroaluminum wires are selected. Universal nomograms with different standard cross section are calculated and constructed. The graphics using Mathcad software are offered.

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