The Research of Application Mode of Unmanned Aircraft Patrol in UHV Transmission Lines

2014 ◽  
Vol 536-537 ◽  
pp. 989-992
Author(s):  
Yong Li ◽  
Xin Ge ◽  
Xue Liang Hou
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Rapid Development ◽  
Unmanned Aircraft ◽  
Structure Characteristics ◽  
Application Mode ◽  
Vehicle Inspection ◽  
Aerial Vehicle ◽  
Ac Transmission ◽  
Uhv Transmission Lines

In the UHV AC transmission lines will be rapid development momentum of main frame China grid, inspection of UHV transmission line for the realization of unmanned aircraft utility,this article makes an analysis for the structure characteristics and defects of the UHV transmission line , finds out the defect characteristics, and summarizes the characteristics of the UAV and inspection instrument. According to the characteristic of UHV defect, we display its properties of unmanned aerial vehicles and inspection instrument, construct the application mode of four kinds of unmanned aerial vehicle inspection, and have a description for each model.

scholarly journals A monocular-based navigation approach for unmanned aerial vehicle safe and autonomous transmission-line inspection

2019 ◽  
Vol 16 (1) ◽  
pp. 172988141982994 ◽  
Author(s):  
Xiaolong Hui ◽  
Jiang Bian ◽  
Xiaoguang Zhao ◽  
Min Tan
Keyword(s):  
Transmission Line ◽  
Unmanned Aerial Vehicle ◽  
Transmission Lines ◽  
Spatial Distance ◽  
Vanishing Point ◽  
Transmission Tower ◽  
Flight Direction ◽  
Field Environment ◽  
Smooth Tracking ◽  
Aerial Vehicle

This article presents a monocular-based navigation approach for unmanned aerial vehicle safe and continuous inspection along one side of transmission lines. To this end, a navigation model based on the transmission tower and the transmission-line vanishing point was proposed, and the following three key issues were addressed. First, a deep-learning-based object detection and a fast and smooth tracking algorithm based on the kernelized correlation filter were combined to locate transmission tower timely and reliably. Second, the vanishing point of transmission lines was computed and optimized to provide unmanned aerial vehicle with a robust and precise flight direction. Third, to keep a stable safe distance from transmission lines, the transmission lines were first rectified by optimizing a homography matrix to eliminate the parallel distortion, and then their interval variation was estimated for reflecting the spatial distance variation. Finally, the real distance from transmission tower was measured by the triangulation across multiple views. The proposed navigation approach and the designed UAV platform were tested in a field environment, which achieved an encouraging result. To the best of authors’ knowledge, this article marks the first time that a safe and continuous navigation approach along one side of transmission lines is put forward and implemented.

scholarly journals Detection method based on improved faster R-CNN for pin defect in transmission lines

2021 ◽  
Vol 300 ◽  
pp. 01011
Author(s):  
Jun Wu ◽  
Sheng Cheng ◽  
Shangzhi Pan ◽  
Wei Xin ◽  
Liangjun Bai ◽  
...  
Keyword(s):  
Transmission Line ◽  
Defect Detection ◽  
Transmission Lines ◽  
False Positive Rate ◽  
Detection Algorithm ◽  
Detection Model ◽  
Positive Rate ◽  
Aerial Vehicle ◽  
The Stability ◽  
Small Targets

Defects such as insulator, pins, and counterweight in highvoltage transmission lines affect the stability of the power system. The small targets such as pins in the unmanned aerial vehicle (UAV) inspection images of transmission lines occupy a small proportion in the images and the characteristic representations are poor which results a low defect detection rate and a high false positive rate. This paper proposed a transmission line pin defect detection algorithm based on improved Faster R-CNN. First, the pre-training weights with higher matching degree are obtained based on transfer learning. And it is applied to construct defect detection model. Then, the regional proposal network is used to extract features in the model. The results of defect detection are obtained by regression calculation and classification of regional characteristics. The experimental results show that the accuracy of the pin defect detection of the transmission line reaches 81.25%

scholarly journals Mechanism Design and Analysis of a New Overhead Transmission Line Inspection Robot

2020 ◽  
Vol 38 (5) ◽  
pp. 1105-1111
Author(s):  
Yishuang Wang ◽  
Chao Yuan ◽  
Yongjie Zhai
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Simulation Analysis ◽  
Rapid Development ◽  
Frame Structure ◽  
Three Dimensional Model ◽  
Obstacle Crossing ◽  
Inspection Robot ◽  
Overhead Transmission Lines ◽  
Inspection Robots

The requirements of power system for the safety of overhead transmission lines are increasing. With the rapid development of mobile robot technology, the inspection of overhead transmission lines by inspection robots has become a research hotspot in recent years. Aiming at the task requirements of transmission line inspection robots and the environmental characteristics of transmission lines, researchers at home and abroad have developed a variety of inspection robots. However, most of these robots have problems such as inability to cross the strain tower, low obstacle crossing efficiency and poor safety. In order to solve the above problems, this paper proposes a new four-arm inspection robot mechanism. The robot can cross the strain tower with two different sets of arms working together. The rectangular frame structure on the walking arm improves the obstacle crossing efficiency of the robot, and the closed hanging mechanism ensures that the robot does not fall from the line. In this paper, the three-dimensional model of the robot is established, and the specific structure and motion parameters are given. Three typical obstacle-crossing modes are planned, and the motion analysis and force simulation analysis of the robot's obstacle-crossing process are carried out. The simulation result shows that the mechanism can efficiently cross the strain towers and common obstacles on the transmission line.

scholarly journals Analysis of Relay Protection System Comparison for Better Identification of Faults in High Voltage AC Transmission Lines

2021 ◽  
Author(s):  
Rimsha Fazal ◽  
Arooj Aslam ◽  
Habib Ullah Manzoor ◽  
Tareq Manzoor
Keyword(s):  
Transmission Line ◽  
High Voltage ◽  
Transmission Lines ◽  
Circuit Breaker ◽  
Operating Time ◽  
Protection System ◽  
Ground Fault ◽  
Double Phase ◽  
Overcurrent Relay ◽  
Ac Transmission

Abstract A high voltage protection system is designed to protect the system against the hazards like instant high voltage condition like lightening voltage in the rain, power variation in the transmission lines etc. In these conditions, our system may face a voltage twice and thrice greater than its original nominal ratings. In this paper, performance of four different relays (overcurrent relay, over and under voltage relay, distance relay and differential relay) have been calculated based on operating time in 400KV high voltage AC transmission line of 80-250km under different faults, modeled on MATLAB for the identification of different types of faults in a transmission line. These relays can differentiate between the normal operating condition and fault conditions. In this paper simulation comparison of these four relays is presented by comparing their operating time in Single line to ground fault (LG), three phase fault (LLLG) and Double phase to ground fault (LLG). The output waveforms are observed under the normal condition or no-fault condition and in the fault condition and response time is calculated to operate a circuit breaker.

Based on the TLM Method 1000kV UHV Transmission Line Performance Analysis

2011 ◽  
Vol 383-390 ◽  
pp. 2917-2922
Author(s):  
Feng Xia Li ◽  
Yue Long Wang
Keyword(s):  
Performance Analysis ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Transmission Power ◽  
Long Distance ◽  
Transmission Distance ◽  
Transmission Line Modeling ◽  
Tlm Method ◽  
Ac Transmission

The TLM model of 3 - phase pow er t ran sm ission line is developed. Appling the transmission line modeling (TLM) method to analysis 1000kV ultrahigh voltage( UHV) AC transmission line, the obtained results prove that it is economical and reasonable to transmit the natural power by power transmission, and the transmission lines is a long-distance transmission power ; but both the super power and the power transmission, the transmission power reduce with the increase of transmission distance.

Analysis on Altitude Correction Factor of 750kV Transmission Line Conductors Corona Inception Voltage

2013 ◽  
Vol 385-386 ◽  
pp. 1108-1111
Author(s):  
Qing Zhong Geng ◽  
Fang Cheng Lü ◽  
Zhu Lei ◽  
Zhu Jun ◽  
Yun Peng Liu
Keyword(s):  
Transmission Line ◽  
Corona Discharge ◽  
Transmission Lines ◽  
Imaging Detector ◽  
Linear Correction ◽  
Tangent Method ◽  
Maximum Tolerance ◽  
Ac Transmission ◽  
Inception Voltage ◽  
Correction Equations

In order to study the effect of attitude for corona inception voltage of AC transmission lines conductors in the altitude areas ranging from 0 to 3000 meters, conducted a series of tests about the corona characteristics of AC six-bundle conductors based on the mobile corona cage at Wuhan, Xining and Haibei respectively. Recorded the number of photons after conductors corona discharge by ultraviolet imaging detector. Conductor corona inception voltages were acquired by the tangent method. The measurement result shows that conductors corona inception voltage decrease with increasing altitude. Corona inception voltage is reduced about 8.12% if altitude rises 1000m. The exponential and linear correction equations suitable for 6 × LGJ-400/50 conductors are introduced. The maximum tolerance is less than 5% and meets the engineering needs.

Research on Electromagnetic Energy Absorbed by Human Body in the Vicinity of High-Voltage Transmission Line

2014 ◽  
Vol 1022 ◽  
pp. 155-158
Author(s):  
Ao Wang ◽  
Zi Wei Chen ◽  
Rui Guan ◽  
Yu Hui Zhu ◽  
Lian Qing Zhao
Keyword(s):  
Electromagnetic Field ◽  
High Voltage ◽  
Transmission Lines ◽  
Field Energy ◽  
High Voltage Transmission Line ◽  
The People ◽  
High Voltage Transmission ◽  
Ac Transmission ◽  
Electromagnetic Field Energy ◽  
Uhv Transmission Lines

When the building is located near high-voltage transmission lines, the people working or living in the building will absorb a certain amount of electromagnetic field energy. When the limit is exceeded, it will have an impact on human health. We studied people in surrounding buildings of 500kV EHV AC transmission lines and 1000kV AC UHV transmission lines and discussed electromagnetic field energy they absorbed.

scholarly journals Monitoring Method of Transmission Line Breaking Prevention Based on Deep Learning

2021 ◽  
Vol 252 ◽  
pp. 01024
Author(s):  
Jiang Yan ◽  
Li Qiang ◽  
Wang Guanyao ◽  
Wang Ben ◽  
Deng Wei
Keyword(s):  
Deep Learning ◽  
Transmission Line ◽  
Transmission Lines ◽  
Rapid Development ◽  
Video Data ◽  
Data Sets ◽  
Monitoring Method ◽  
Monitoring Model ◽  
Public Data ◽  
3D Cnn

With the rapid development of the national economy, the national power consumption level continues to increase, which puts forward higher requirements on the power supply guarantee capacity of the power grid system. The distribution range of the transmission line is wide and densely, most lines are exposed to the unguarded field without any shielding or protective measures, which are vulnerable to man-made destruction or natural disasters. Therefore, it is very important for the early monitoring and prevention of the external force breaking of the transmission lines. The method for preventing external breakage of transmission lines based on deep learning proposed in this paper utilizes the video data collected by the cameras erected on the transmission line roads to perform feature extraction and learning through 3D CNN and LSTM networks, and obtains a monitoring model for external breakage prevention of transmission lines. The model was tested on public data sets and verified that it has a good performance in the field of transmission lines against external damage. The method in this paper makes full use of the existing video acquisition equipment, and the process does not require human intervention, which greatly reduces the cost of line monitoring and the hidden dangers of accidents.

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