scholarly journals Classification of high-voltage power line structures in low density ALS data acquired over broad non-urban areas

2021 ◽  
Vol 7 ◽  
pp. e672
Author(s):  
Jean-Romain Roussel ◽  
Alexis Achim ◽  
David Auty
Keyword(s):  
High Voltage ◽  
Laser Scanning ◽  
Point Clouds ◽  
Power Line ◽  
Power Lines ◽  
Electrical Network ◽  
Low Density ◽  
Area Of Interest ◽  
Transmission Towers ◽  
High Voltage Power Lines

Airborne laser scanning (ALS) has gained importance over recent decades for multiple uses related to the cartography of landscapes. Processing ALS data over large areas for forest resource estimation and ecological assessments requires efficient algorithms to filter out some points from the raw data and remove human-made structures that would otherwise be mistaken for natural objects. In this paper, we describe an algorithm developed for the segmentation and cleaning of electrical network facilities in low density (2.5 to 13 points/m2) ALS point clouds. The algorithm was designed to identify transmission towers, conductor wires and earth wires from high-voltage power lines in natural landscapes. The method is based on two priors i.e. (1) the availability of a map of the high-voltage power lines across the area of interest and (2) knowledge of the type of transmission towers that hold the conductors along a given power line. It was tested on a network totalling 200 km of wires supported by 415 transmission towers with diverse topographies and topologies with an accuracy of 98.6%. This work will help further the automated detection capacity of power line structures, which had previously been limited to high density point clouds in small, urbanised areas. The method is open-source and available online.

scholarly journals Fast and Accurate Power Line Corridor Survey Using Spatial Line Clustering of Point Cloud

2021 ◽  
Vol 13 (8) ◽  
pp. 1571
Author(s):  
Yuchun Huang ◽  
Yingli Du ◽  
Wenxuan Shi
Keyword(s):  
High Voltage ◽  
Ground Truth ◽  
Point Clouds ◽  
Power Line ◽  
Power Lines ◽  
Spatial Distance ◽  
Stable Operation ◽  
3D Point Clouds ◽  
Overhead Power Lines ◽  
Power Line Corridor

High-voltage and ultra-high-voltage overhead power lines are important to meet the electricity demand of our daily activities and productions. Due to the overgrowth of trees/vegetation within the corridor area, the distance between the power lines and its surroundings may break through the safety threshold, which could cause potential hazards such as discharge and fire. To ensure the safe and stable operation of the power lines, it is necessary to survey them regularly so that the potential hazards from the surroundings within the power line corridor could be investigated timely. This paper is motivated to quickly and accurately survey the power line corridor with the 3D point clouds. The main contributions of this paper include: (1) the spatial line clustering is proposed to accurately classify and complete the power line points, which can greatly overcome the sparsity and missing of LiDAR points within the complex power line corridor. (2) The contextual relationship between power lines and pylon is well investigated by the grid-based analysis, so that the suspension points of power lines on the pylon are well located. (3) The catenary plane-based simplification of 3D spatial distance calculation between power lines and ground objects facilitates the survey of the power line corridor. Experimental results show that the accuracy of safety distance surveying is 5 cm for power line corridors of all voltage levels. Compared to the ground-truth point-to-point calculation, the speed of surveying is enhanced thousands of times. It is promising to greatly improve both the accuracy and efficiency of surveying the potential hazards of power line corridor.

scholarly journals AUTOMATIC RAILWAY POWER LINE EXTRACTION USING MOBILE LASER SCANNING DATA

2016 ◽  
Vol XLI-B5 ◽  
pp. 615-619
Author(s):  
Shanxin Zhang ◽  
Cheng Wang ◽  
Zhuang Yang ◽  
Yiping Chen ◽  
Jonathan Li
Keyword(s):  
Laser Scanning ◽  
Region Growing ◽  
Point Clouds ◽  
Power Line ◽  
Power Lines ◽  
Practical Significance ◽  
Space Region ◽  
Extraction Technology ◽  
Line Extraction ◽  
Fitting Algorithm

Research on power line extraction technology using mobile laser point clouds has important practical significance on railway power lines patrol work. In this paper, we presents a new method for automatic extracting railway power line from MLS (Mobile Laser Scanning) data. Firstly, according to the spatial structure characteristics of power-line and trajectory, the significant data is segmented piecewise. Then, use the self-adaptive space region growing method to extract power lines parallel with rails. Finally use PCA (Principal Components Analysis) combine with information entropy theory method to judge a section of the power line whether is junction or not and which type of junction it belongs to. The least squares fitting algorithm is introduced to model the power line. An evaluation of the proposed method over a complicated railway point clouds acquired by a RIEGL VMX450 MLS system shows that the proposed method is promising.

Insulating Devices for Cranes - Test Results

1990 ◽  
Vol 7 (2) ◽  
Author(s):  
J. Derald Morgan
Keyword(s):  
High Voltage ◽  
Current Flow ◽  
Power Line ◽  
Limiting Current ◽  
Power Lines ◽  
Potential Usefulness ◽  
Test Results ◽  
Insulation System ◽  
Insulation Systems ◽  
High Voltage Power Lines

Two types of devices for cranes, the boom cage (guard) and the insulated link, depend on an insulation system for their operation. In order to properly evaluate the potential usefulness of such devices for personnel protection, their insulation systems must be carefully tested for effectiveness, dependability, and reliability over the life of the device and in the environment of expected use. The boom cage (guard) is suggested as protection from accidental contact of the boom of a crane when working alongside, over, or under high-voltage power lines. The insulated link is suggested as protection to hook tender and riggers by limiting current flow if the crane contacts the power line.

The Impact on the Electromagnetic Environment of Medium Wave Broadcasting Stations Caused by 110kV Power Lines

2014 ◽  
Vol 986-987 ◽  
pp. 2023-2026
Author(s):  
Guan Wang ◽  
Hao Hu ◽  
Fei Yu ◽  
Yu Gong ◽  
Wen Hua Jiang
Keyword(s):  
Electromagnetic Field ◽  
Numerical Analysis ◽  
Computer Model ◽  
High Voltage ◽  
Wave Amplitude ◽  
Power Line ◽  
Power Lines ◽  
Electromagnetic Environment ◽  
High Voltage Power Lines ◽  
The Impact

In this paper, the numerical analysis methods of electromagnetic field is used and by establishing the computer model of 110kV high-voltage power line and medium wave amplitude modulated broadcasting (AM) stations, the impact on the electromagnetic environment of medium wave broadcasting stations caused by 110kV high-voltage power lines is analyzed.

scholarly journals AUTOMATIC RAILWAY POWER LINE EXTRACTION USING MOBILE LASER SCANNING DATA

2016 ◽  
Vol XLI-B5 ◽  
pp. 615-619 ◽  
Author(s):  
Shanxin Zhang ◽  
Cheng Wang ◽  
Zhuang Yang ◽  
Yiping Chen ◽  
Jonathan Li
Keyword(s):  
Laser Scanning ◽  
Region Growing ◽  
Point Clouds ◽  
Power Line ◽  
Power Lines ◽  
Practical Significance ◽  
Space Region ◽  
Extraction Technology ◽  
Line Extraction ◽  
Fitting Algorithm

Research on power line extraction technology using mobile laser point clouds has important practical significance on railway power lines patrol work. In this paper, we presents a new method for automatic extracting railway power line from MLS (Mobile Laser Scanning) data. Firstly, according to the spatial structure characteristics of power-line and trajectory, the significant data is segmented piecewise. Then, use the self-adaptive space region growing method to extract power lines parallel with rails. Finally use PCA (Principal Components Analysis) combine with information entropy theory method to judge a section of the power line whether is junction or not and which type of junction it belongs to. The least squares fitting algorithm is introduced to model the power line. An evaluation of the proposed method over a complicated railway point clouds acquired by a RIEGL VMX450 MLS system shows that the proposed method is promising.

ACTIVE SCREENING MAGNETIC FIELD SYSTEMS SYNTHESIS FOR SINGLE-CIRCUIT HIGH VOLTAGE POWER LINES WITH VERTICAL CONDUCTORS WITH SINGLE COMPENSATING COIL

2017 ◽  
Vol 25 (101) ◽  
pp. 402-408
Author(s):  
Boris B., Kobyljanskij ◽  
◽  
Valery V., Kolomiec ◽  
Boris I., Kuznetsov ◽  
Tatyana B., Nikitina ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Voltage ◽  
Power Lines ◽  
Active Screening ◽  
Field Systems ◽  
High Voltage Power Lines

“These Power Lines Make Me Ill”: A Typology of Residents’ Health Responses to a New High-Voltage Power Line

Risk Analysis ◽  
2017 ◽  
Vol 37 (12) ◽  
pp. 2276-2288 ◽  
Author(s):  
Jarry T. Porsius ◽  
Liesbeth Claassen ◽  
Fred Woudenberg ◽  
Tjabe Smid ◽  
Danielle R. M. Timmermans
Keyword(s):  
High Voltage ◽  
Power Line ◽  
Power Lines

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

2021 ◽  
Vol 11 (2) ◽  
pp. 492
Author(s):  
Levente Rácz ◽  
Bálint Németh
Keyword(s):  
Expert System ◽  
Electric Field ◽  
High Voltage ◽  
Low Frequency ◽  
Power Line ◽  
Power Lines ◽  
Design Parameters ◽  
Monitoring Methods ◽  
Limit Value ◽  
Potential Applications

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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