scholarly journals Assessment of the Risk of Damage to 110 kV Overhead Lines Due to Wind

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 556
Author(s):  
Andrew Lukas Chojnacki
Keyword(s):  
Wind Speed ◽  
Probability Density ◽  
Statistical Method ◽  
Wind Damage ◽  
Power Lines ◽  
Power Structures ◽  
Overhead Lines ◽  
Overhead Power Lines ◽  
Risk Of Wind Damage ◽  
The Impact

The article presents an assessment of the risk of damage to 110 kV overhead power lines as a result of the impact of wind of variable speeds on that equipment. A statistical method for the assessment of the reliability of power structures in conditions of variable strength of the structure and at variable exposure values is presented. This method is based on the analysis of the shape and mutual location of the distributions of the probability density of the momentary resistance (strength) of the tested structure and the exposures of variable values occurring in its surroundings. The risk of wind damage to 110 kV lines has been determined on the basis of many years of observations of wind speed and failure rate of the lines. Wind has been shown to be the fault factor or co-factor responsible for damage in one in five failures of such equipment. The final part of the article includes an analysis of the obtained results and their interpretation.

scholarly journals Feasibility study on the use of oil-well tubing in construction of intermediate support for 6-10 kV high voltage overhead power lines in the development of oilfields

2019 ◽  
Vol 124 ◽  
pp. 05042
Author(s):  
A.N. Korkishko ◽  
O.A. Korkishko ◽  
A.A. Kosov
Keyword(s):  
Climatic Factors ◽  
Economic Feasibility ◽  
Power Lines ◽  
Oil Well ◽  
Overhead Lines ◽  
Intermediate Support ◽  
Technical Possibility ◽  
Overhead Power Lines ◽  
Office Software ◽  
The Impact

This article is devoted to assessing the technical effectiveness and economic feasibility of oilwell tubing in construction of intermediate supports for overhead power lines (6–10 kV) in the development of oil, gas and condensate field in the conditions of Far North. The article considers the technical possibility and economic feasibility of using the built-up cross section of the intermediate support of overhead lines consisting of two tubes welded together. The SCAD office software was used to calculate the strength of the proposed section for the design load, taking into account the impact of climatic factors. A comparative analysis of the construction cost was performed for 1 km of overhead power lines made of conventional materials and oil-well tubing. The calculations showed the feasibility of using this material for the construction of 6-10 kV overhead lines.

scholarly journals Impact of the Ground on the Series Impedance of Overhead Power Lines

2020 ◽  
Vol 7 (3) ◽  
pp. 47-54
Author(s):  
Anastázia Margitová ◽  
Michal Kolcun ◽  
Martin Kanálik
Keyword(s):  
Electrical Energy ◽  
Electric Power System ◽  
Power Lines ◽  
Electrical Parameters ◽  
Overhead Lines ◽  
Return Path ◽  
Overhead Power Lines ◽  
The Impact ◽  
Overhead Power Line ◽  
Series Impedance

An overhead power line is a structure used in the electric power system to transmit electrical energy. The performance of overhead power lines depends on their parameters. There are four basic electrical parameters of power lines: resistance, inductance, capacitance, and shut conductance. The paper focuses on the calculation of the series impedance of overhead lines (resistance and inductance) by three different methods (Carsonʹs method, Rüdenbergʹs method and the theory of complex penetration depth) considering the impact of the ground return path. There is also the comparison of these methods and their application on models of real power lines of different voltage levels provided in this paper.

Influence of wind speed on the reliability of low-voltage overhead power lines

2019 ◽  
Author(s):  
Kornelia Banasik ◽  
Andrzej L. Chojnacki ◽  
Katarzyna Gebczyk ◽  
Lukasz Grakowski
Keyword(s):  
Wind Speed ◽  
Low Voltage ◽  
Power Lines ◽  
Overhead Power Lines

scholarly journals Analysis of the Torsional Stability of Split Phases

2019 ◽  
Vol 62 (6) ◽  
pp. 503-513
Author(s):  
I. I. Sergey ◽  
Y. G. Panamarenka ◽  
Y. V. Potachits ◽  
N. A. Yudina
Keyword(s):  
High Voltage ◽  
Climatic Factors ◽  
Short Circuit ◽  
Low Frequency ◽  
Power Lines ◽  
Structural Elements ◽  
Stability Calculation ◽  
Overhead Lines ◽  
Torsional Stability ◽  
Overhead Power Lines

The specificity of overhead power lines is associated with the fact that the length of conductors between the supporting structures can reach tens of thousands of meters. Wires and their components are exposed to climatic factors, viz. wind, rain, ice, snow. As compared to other structural elements, conductors are of the highest flexibility and lowest rigidity, and, therefore, they are the most sensitive elements to these effects. Since the early fifties of the XX century, the increase in energy consumption has caused the construction of high and ultra-high voltage overhead lines with split phases. For these types of conductors, new forms of oscillations have been noticed in the areas between the struts, the essence of which is torqueing the split phase. As a result, there is a violation of the torsional stability of the phase: collision of wires in the middle of sub-span and friction of wires of stranded conductor against each other, which leads to damaging conductors and, as a consequence, to disruption of power supply to consumers. Almost any overhead lines may be subjected to oscillations of wires in the span under the influence of wind. One of the types of such mechanical oscillations is galloping, i. e. low-frequency oscillations of wires with an amplitude reaching the value of the boom of wire sagging, and, taking into account the possibility of elongation of the wire, even exceeding it. Fluctuations in the galloping can cause significant mechanical forces and last long enough to lead to the destruction of structural elements of power lines, viz. wires, insulators, fittings and even pillars. Due to the large amplitude of oscillations, conductors of neighboring phases can approach each other at an unacceptable distance, resulting in a short circuit. The boundary value problem of the torsional stability calculation of the split phase with a given multiplicity of splitting has been set and solved. The critical lengths of the sub-spans at which the stable violation of torsional stability is most likely have been determined. A computer program has been developed, which can be used in the design of high-voltage lines with split phase.

scholarly journals Modeling of Ice-Shedding from ACSR Power Line

2017 ◽  
Vol 67 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Juraj Hrabovský ◽  
Roman Gogola ◽  
Justín Murín ◽  
Tibor Sedlár
Keyword(s):  
Numerical Analysis ◽  
Material Properties ◽  
Double Bundle ◽  
Power Line ◽  
Power Lines ◽  
Jump Height ◽  
Effective Material Properties ◽  
Ice Shedding ◽  
Overhead Power Lines ◽  
The Impact

Abstract In this contribution, the analysis of ice-shedding from Aluminium Conductor Steel Reinforced (ACSR) power lines is presented. The impact of the icing position on the overhead power lines, the resulting jump height, and impact on attachment tension points after ice-shedding is examined. In the numerical simulations the effective material properties of the ACSR conductor is calculated using the homogenisation method. Numerical analysis of one power line and double-bundle power lines with icing over the whole range or only on certain sections of single and double-bundle power lines are performed

scholarly journals Determination of the minimum wind speed leading to the galloping of conductors

2020 ◽  
Vol 180 ◽  
pp. 04019
Author(s):  
Muratkali Zhamanbaev ◽  
Diana Ilieva ◽  
Rakhimash Abitaeva ◽  
Bulbul Ongar
Keyword(s):  
Wind Speed ◽  
Nonlinear Equation ◽  
Mutual Influence ◽  
Power Lines ◽  
Oscillatory Process ◽  
Hurwitz Stability ◽  
Aeroelastic Instability ◽  
First Approximation ◽  
Overhead Power Lines

The object of research in this paper is the split phase of overhead power lines. The study of the aeroelastic instability of the icy conductors of the split phase for a multi-span system has already been explored using the method of determining the Hurwitz stability criterion. In multi-span systems, where conductors are interconnected through a garland of insulators, the garlands themselves are involved in an oscillatory process. As a result of this, mutual influence of adjacent spans is observed energy is transferred from one span to another. The paper investigates the aeroelastic instability of the icy conductors of the split phase in the anchor span, which is characterized by two intrinsic features: the attachment point of conductors on the supports is fixed and mutual effects between adjacent spans are not observed. The study of motion instability is carried out by the first approximation method, that is, on the basis of linearization of the nonlinear equation at the equilibrium point and further investigation of the linearized equation in the vicinity of this point. The results of the study are based on the novelty of the carried out experiments - taking into account the peculiarities of the anchor span and the findings based on the analysis of empirical data.

scholarly journals Analysis of the Condition and Monitoring of Emergency Power Outages in 10 kV Overhead Lines of the Oryol Region

2020 ◽  
Vol 178 ◽  
pp. 01074
Author(s):  
Igor Nikolaevich Fomin ◽  
Alexander Vladimirovich Vinogradov ◽  
Roman Pavlovich Belikov ◽  
Tatyana Anatolyevna Kudinova ◽  
Marat Firdenatovich Nizamiev
Keyword(s):  
Power Supply ◽  
Power Line ◽  
Power Lines ◽  
Efficiency Improvement ◽  
Reliable Operation ◽  
Power Outages ◽  
Overhead Lines ◽  
Uninterrupted Power Supply ◽  
Emergency Power ◽  
Overhead Power Lines

Efficiency improvement of modern production is associated with uninterrupted power supply to consumers. Power supply reliability to consumers is ensured by reliable operation of power lines. The number of outages depends on their condition and operation quality. An increase in the number of outages affects the further degradation of power line state, significantly reducing the resource of lines and equipment; and it takes a lot of time to find faults and eliminate them. Monitoring of power outages in overhead power lines will reduce the time of emergency elimination.1

Testing an individual tree wind damage risk model in a naturally regenerated balsam fir stand: potential impact of thinning on the level of risk

2020 ◽  
Author(s):  
Marine Duperat ◽  
Barry Gardiner ◽  
Jean-Claude Ruel
Keyword(s):  
Risk Model ◽  
Abies Balsamea ◽  
Wind Damage ◽  
Balsam Fir ◽  
Individual Tree ◽  
Commercial Thinning ◽  
Increased Risk ◽  
Risk Of Wind Damage ◽  
The Impact ◽  
Damage Risk

Abstract Widely distributed in Quebec, balsam fir (Abies balsamea (L.) Mill.) is highly vulnerable to wind damage. Recently, there has been a trend in forest management to increase the use of partial cuttings in naturally regenerating stands, leaving the remnant trees at increased risk of wind damage. In order to limit wind damage after partial cuttings, it is therefore important to find silvicultural practices that minimize the risk of wind damage in these fir stands. Our main objective was to find balsam fir-specific values of parameters to integrate into the wind risk model ForestGALES, in order to simulate the impact of different types of commercial thinning on wind damage risk, and to determine which practice potentially minimizes the risk in a naturally regenerated stand. An anemometer placed at canopy height and strain gauges attached to the trunks of balsam firs allowed us to measure the wind-induced bending moments experienced by a sample of balsam fir trees. This enabled the calculation of the turning moment coefficients specific to each of the trees in order to compare them with the ForestGALES model predictions and to adapt the model for balsam fir stands. The model was tested first with only tree diameter and height as input variables to calculate the turning moment coefficient, then with the addition of a competition index, and finally with the addition of crown dimensions. Wind climate parameters for prediction of the probability of damage were calculated using the Wind Atlas Analysis and Application Program airflow model. The model with the highest accuracy was then used to simulate two types of thinning and determine the impact on wind damage risk for each tree in the stand. According to the model’s predictions, thinning from below has a reduced risk of wind damage compared with thinning from above.

scholarly journals Spatial Distribution of Overhead Power Lines and Underground Cables in Germany in 2016

Data ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 34 ◽  
Author(s):  
Marcus Eichhorn ◽  
Miron Thylmann ◽  
Wolfgang Peters ◽  
Pascal Kinast ◽  
Daniela Thrän ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Environmental Impact ◽  
Spatial Data ◽  
Energy System ◽  
Power Lines ◽  
Technological Parameters ◽  
Total Size ◽  
Underground Cables ◽  
Overhead Lines ◽  
Overhead Power Lines

In the context of transformative energy policy frameworks, such as the German “Energiewende”, state and federal agencies, regulators, and country planners need reliable data on the energy system infrastructure to make substantiated decisions about line routing and extension. The decision-making processes are accompanied by interdisciplinary research efforts in the areas of energy system planning and modelling, economic viability, and environmental impact, e.g., visual amenity or potential impacts on species. Proved data on the spatial distribution of the electricity transmission and distribution network can inform these efforts, in particular when combined with key technological parameters, like installed capacity, total size, and required space. Without these data, adequate assessments of potential impacts, e.g., the collision of birds with overhead lines, are not possible. However, no such comprehensive dataset exists for Germany. The dataset produced in this paper is based on open-source data using OpenStreetMap (OSM). It covers the spatial distribution of overhead power lines and underground cables of Germany, combined with the attributes needed for adequate environmental impact assessment of overhead lines, such as voltage levels, route length, and circuit lengths. Furthermore, the dataset is validated by different publicly available statistics provided by the German Federal Grid Agency and official spatial data of the Federal Office of Cartography and Geodesy.

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