Application of radar measurement technology in 3D surveying and mapping of transmission lines

2021 ◽  
pp. 1-9
Author(s):  
Jia Jun ◽  
Rui Fu ◽  
Wang Jian ◽  
Dai Yong Dong ◽  
Shen Xiang ◽  
...  
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Smart Grids ◽  
Development Trend ◽  
Fault Analysis ◽  
Measurement Technology ◽  
Paper Briefly ◽  
Operation And Maintenance ◽  
Construction Operation ◽  
Specific Implementation

This paper briefly introduces the background, significance, and development status of 3D radar technology at home and abroad, and then explains the concept, working principle, system composition, and workflow of the radar system. Combined with the current development trend of smart grids, it focuses on the application scope of this technology in the field of transmission line construction, operation, and maintenance. Then, through the specific implementation of the project cases, the daily operation and maintenance of four 500 kV transmission lines in Nanjing have played a certain guiding role. Finally, according to the development trend of smart grid and the actual demand of power system production and business integration, this paper briefly prospects the function expansion of this technology in transmission line operation evaluation, fault analysis and diagnosis, emergency rescue plan formulation, and other fields.

Analysis on De-Icing Methods for 4-Bundle 500kV Transmission Lines

2013 ◽  
Vol 694-697 ◽  
pp. 790-794
Author(s):  
Shun Xin Liu ◽  
You Han Guo
Keyword(s):  
Transmission Line ◽  
South China ◽  
Transmission Lines ◽  
Research Direction ◽  
Development Trend ◽  
Ice Melting ◽  
Power Networks ◽  
Advantages And Disadvantages ◽  
Prevention And Treatment ◽  
The Development Trend

In view of the massive transmission lines suffered disaster of ice coating at the beginning of 2008 in south China. In this paper, several typical schemes for the prevention and treatment of ice coating occurred in power networks home and abroad are analyzed. Common melting ice methods can be divided into three kinds: thermal ice-melting, mechanical de-icing and new de-icing. This paper describes a 500 kV transmission line and analyses each of these measures briefly. At the same time, the advantages and disadvantages of various measures and their applications were summarized. At last, the development trend and the research direction were pointed out．

scholarly journals Analytical Model for High Impedance Fault Analysis in Transmission Lines

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
S. Maximov ◽  
V. Torres ◽  
H. F. Ruiz ◽  
J. L. Guardado
Keyword(s):  
Transmission Line ◽  
Analytical Model ◽  
Transmission Lines ◽  
Fire Hazard ◽  
Human Life ◽  
Electric Arc ◽  
Fault Analysis ◽  
Arc Model ◽  
High Impedance ◽  
High Impedance Fault

A high impedance fault (HIF) normally occurs when an overhead power line physically breaks and falls to the ground. Such faults are difficult to detect because they often draw small currents which cannot be detected by conventional overcurrent protection. Furthermore, an electric arc accompanies HIFs, resulting in fire hazard, damage to electrical devices, and risk with human life. This paper presents an analytical model to analyze the interaction between the electric arc associated to HIFs and a transmission line. A joint analytical solution to the wave equation for a transmission line and a nonlinear equation for the arc model is presented. The analytical model is validated by means of comparisons between measured and calculated results. Several cases of study are presented which support the foundation and accuracy of the proposed model.

Transmission Line Fault Detection: A Review

2017 ◽  
Vol 8 (1) ◽  
pp. 199
Author(s):  
Hui Hwang Goh ◽  
Sy yi Sim ◽  
Asad Shaykh ◽  
Md. Humayun Kabir ◽  
Chin Wan Ling ◽  
...  
Keyword(s):  
Fault Detection ◽  
Power System ◽  
Transmission Line ◽  
Transmission Lines ◽  
Reactive Power ◽  
Transmission Loss ◽  
Source Area ◽  
Fault Analysis ◽  
Power System Engineering ◽  
Voltage Deviation

<p>Transmission line is the most important part of the power system.  Transmission lines a principal amount of power. The requirement of power and its allegiance has grown up exponentially over the modern era, and the major role of a transmission line is to transmit electric power from the source area to the distribution network. The exploded between limited production, and a tremendous claim has grown the focus on minimizing power losses. Losses like transmission loss and also conjecture factors as like as physical losses to various technical losses, Another thing is the primary factor it has a reactive power and voltage deviation are momentous in the long-range transmission power line. In essentially, fault analysis is a very focusing issue in power system engineering to clear fault in short time and re-establish power system as quickly as possible on very minimum interruption. However,  the fault detection that interrupts the transmission line is itself challenging task to investigate fault as well as improving the reliability of the system. The transmission line is susceptible given all parameters that connect the whole power system. This paper presents a review of transmission line fault detection.</p>

The Overviews of Application of Three-Dimensional LiDar Technology in Operation and Maintenance of Overhead Transmission Lines in China

2013 ◽  
Vol 718-720 ◽  
pp. 946-951
Author(s):  
Jin Mu Chen ◽  
Xun Feng Wang ◽  
Xian Feng Lu ◽  
Chun Lin Zhang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Data Processing ◽  
Transmission Lines ◽  
Three Dimensional ◽  
Paper Briefly ◽  
Overhead Transmission Lines ◽  
Operation And Maintenance ◽  
3D Lidar

The paper briefly reviews the operational principles and commercialized conditions of airborne three-dimensional (3D) LiDar and terrestrial 3D LiDar. And then the representative functions of 3D LiDar that are developed for the operation and maintenance of overhead transmission lines (OTL) are described in detail. Besides, the problems associated with the process of applying 3D LiDar to OTL are analyzed. It is pointed out that it is necessary to make improvement to several aspects, including new functions development, standardization of application approaches and the simplification of data processing.

scholarly journals Abnormality detection method for transmission lines based on video code stream analysis

2021 ◽  
Vol 245 ◽  
pp. 01028
Author(s):  
Wang Guanyao ◽  
Wang Xu
Keyword(s):  
Transmission Line ◽  
Real Time ◽  
Transmission Lines ◽  
Video Stream ◽  
Normal Operation ◽  
Video Code ◽  
Monitoring Method ◽  
Time Performance ◽  
Operation And Maintenance ◽  
Time Required

As the demand for electricity continues to grow, the coverage of transmission lines is getting larger. Despite the continuous improvement of the grid system, transmission lines are still vulnerable to various natural disasters. At the same time, many transmission lines are installed in areas with harsh environments and other places that are difficult for operation and maintenance personnel to reach, which brings huge challenges to the operation and maintenance of transmission lines. Therefore, how to effectively detect the status of the transmission line and ensure the normal operation of the power grid has become an important research topic in the power system. The existing video surveillance-based methods need to decode the video, which has poor real-time performance. Therefore, this paper proposes a transmission line abnormality monitoring method based on video stream analysis. Using the extracted parameters for judgment before decoding the video stream can effectively improve the real-time performance of online monitoring of the transmission line and greatly shorten the time required for abnormal alarms.

scholarly journals Transmission line condition assessment technology based on multi-source Parameter Fusion

2021 ◽  
Vol 2108 (1) ◽  
pp. 012018
Author(s):  
Wentao Dai ◽  
Minzhen Wang ◽  
Jiankai Guo ◽  
Zheng Li ◽  
Dongliang Qiao ◽  
...  
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Short Term Memory ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Source Parameter ◽  
Operation And Maintenance ◽  
State Evaluation ◽  
Memory Network ◽  
Distribution State

Abstract Aiming at the shortcomings of current transmission line state evaluation, which refers to the isolation of scalars and the low accuracy of evaluation methods, a transmission line state evaluation technology based on multi-source parameter fusion is proposed. This paper collects and selects characteristic data such as line test inspection information, operation and maintenance records, and power grid operating parameters as indicator quantities. The membership function is used to express the distribution state of the index quantity, and the distribution state is used as the data to establish a comprehensive evaluation model of the line operation state based on the long- and short-term memory network. The data tag is used to train the deep network to establish the mapping relationship between index parameters and operation state. Experiments show that the evaluation accuracy of the proposed method is significantly higher than that of the traditional shallow method, which can provide theoretical guidance for the operation and maintenance of overhead transmission lines.

A Study on De-Icing Technology for Electric Transmission Line

2012 ◽  
Vol 479-481 ◽  
pp. 2339-2342
Author(s):  
Qin Zhu Huang ◽  
Jian Wei Liu ◽  
Ya Zhou ◽  
Yan Jun Liao ◽  
Ning Lv
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Research Work ◽  
Development Trend ◽  
Present Condition ◽  
Electric Transmission ◽  
Electric Transmission Line ◽  
The Development Trend

The article aims to analyze kinds of de-icing methods in detail with the present condition that the transmission lines often suffered serious damage with the deep ice over them. It also points out the development trend of de-icing technology in the next years and provides some advices for the de-icing research work of transmission line in our country.

Composite right/left-handed transmission line with array of thermocouples for generating terahertz radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20502
Author(s):  
Behrokh Beiranvand ◽  
Alexander S. Sobolev ◽  
Anton V. Kudryashov
Keyword(s):  
Transmission Line ◽  
Terahertz Radiation ◽  
Transmission Lines ◽  
Software Package ◽  
Optical Pulses ◽  
Capacitively Coupled ◽  
Voltage Difference ◽  
Left Handed ◽  
Microwave Transmission ◽  
Commercial Software Package

We present a new concept of the thermoelectric structure that generates microwave and terahertz signals when illuminated by femtosecond optical pulses. The structure consists of a series array of capacitively coupled thermocouples. The array acts as a hybrid type microwave transmission line with anomalous dispersion and phase velocity higher than the velocity of light. This allows for adding up the responces from all the thermocouples in phase. The array is easily integrable with microstrip transmission lines. Dispersion curves obtained from both the lumped network scheme and numerical simulations are presented. The connection of the thermocouples is a composite right/left-handed transmission line, which can receive terahertz radiation from the transmission line ports. The radiation of the photon to the surface of the thermocouple structure causes a voltage difference with the bandwidth of terahertz. We examined a lossy composite right/left-handed transmission line to extract the circuit elements. The calculated properties of the design are extracted by employing commercial software package CST STUDIO SUITE.

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