scholarly journals Time-Multiplexed Self-Powered Wireless Current Sensor for Power Transmission Lines

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1561
Author(s):  
Hao Chen ◽  
Zhongnan Qian ◽  
Chengyin Liu ◽  
Jiande Wu ◽  
Wuhua Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Current Measurement ◽  
Current Sensor ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Current Sensing ◽  
Self Powered

Current measurement is a key part of the monitoring system for power transmission lines. Compared with the conventional current sensor, the distributed, self-powered and contactless current sensor has great advantages of safety and reliability. By integrating the current sensing function and the energy harvesting function of current transformer (CT), a time-multiplexed self-powered wireless sensor that can measure the power transmission line current is presented in this paper. Two operating modes of CT, including current sensing mode and energy harvesting mode, are analyzed in detail. Through the design of mode-switching circuit, harvesting circuit and measurement circuit are isolated using only one CT secondary coil, which eliminates the interference between energy harvesting and current measurement. Thus, the accurate measurement in the current sensing mode and the maximum energy collection in the energy harvesting mode are both realized, all of which simplify the online power transmission line monitoring. The designed time-multiplexed working mode allows the sensor to work at a lower transmission line current, at the expense of a lower working frequency. Finally, the proposed sensor is verified by experiments.

A multi-unit serial inspection robot for power transmission lines

2019 ◽  
Vol 46 (2) ◽  
pp. 223-234 ◽  
Author(s):  
Guanghong Tao ◽  
Lijin Fang
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Line ◽  
The Novel ◽  
Power Transmission Lines ◽  
Obstacle Crossing ◽  
Content Type ◽  
Inspection Robot ◽  
Serial Robot

Purpose The purpose of this paper is to introduce a robot mechanism designed for power transmission line inspection. The focus for this design is on obstacle-crossing ability with a goal to create a robot moving and crossing obstacle on not only the straight line but also the steering line. Design/methodology/approach A novel four-unit tri-arm serial robot mechanism is proposed. Every novel unit designed for pitching motion is based on parallelogram structure, which is driven by cables and only one motor. There is gripper-wheel compounding mechanism mounted on the arm. The prototype and obstacle environments are established, and the obstacle-crossing experiments are conducted. Findings The novel unit mechanism and robot prototype have been tested in the lab. The prototype has demonstrated the obstacle-crossing ability when moving and crossing fundamental obstacles on the line. The experimental results show that the robot mechanism meets the obstacle-crossing requirements. Practical implications The novel robot technology can be used for defect inspection of power transmission line by power companies. Social implications It stands to lower the intense and risk of inspection works and reduce the costs related to inspection. Originality/value Innovative features include its architecture, mobility and driving method.

scholarly journals Repair compositions for restoration of operated reinforced concrete structures

2021 ◽  
Vol 273 ◽  
pp. 04017
Author(s):  
Elena Shlyakhova ◽  
Irina Serebryanaya ◽  
Inna Egorochkina ◽  
Andrey Matrosov ◽  
Maxim Odinets ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Transmission Line ◽  
Transmission Lines ◽  
Life Support ◽  
Power Transmission ◽  
Technical Condition ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Operational Characteristics ◽  
Concrete Elements

Power transmission lines (PTL) are strategic objects, the reliability of which depends on the life support of the country. Most of the currently operated power transmission lines were put into operation in the twentieth century, and by now there is a problem of assessing their technical condition, repairing them, if necessary, and maintaining them in a working condition. Defects that appear during the operation of reinforced concrete elements of power transmission lines have different localization and degree of manifestation, but typical is the destruction of the surface layer of concrete with exposure of rebar, more often at the base of the power transmission line. The aim of the work is to select the optimal composition of the repair mixture based on non-shrinking and expanding cements, ensuring reliable adhesion of the repair compounds to the concrete of the structure, which will restore the bearing and operational characteristics in the repaired reinforced concrete elements of the power transmission line at the design level.

Prediction Model for Power Transmission Line Icing Load Based on Data-Driven

2010 ◽  
Vol 143-144 ◽  
pp. 1295-1299 ◽  
Author(s):  
Peng Li ◽  
Ning Li ◽  
Qi Mao Li ◽  
Min Cao ◽  
Huo Xing Chen
Keyword(s):  
Prediction Model ◽  
Transmission Line ◽  
Transmission Lines ◽  
Good Accuracy ◽  
Power Transmission ◽  
Training Data ◽  
Data Driven ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Accuracy Of Prediction

How to monitor and predict icing load of power transmission lines are important problems for the reliability of power grid. A model based on data-driven is presented here to predict the icing load of transmission line, which is available to forecast the icing disaster of it. The fitfulness, which influencing the prediction results of icing load, is analyzed and discussed in this paper. According to the results of simulation, this model has a good accuracy of prediction if the training data and prediction data are in the same icing process. If the icing process is not same but contiguous, it also can predict the degree of icing load qualitatively.

Research on 3D Inspection Simulation Training System of 500kV Power Transmission Lines

2013 ◽  
Vol 482 ◽  
pp. 394-399 ◽  
Author(s):  
Wen Xiang Xiang ◽  
Hao Luo ◽  
Zhi Peng Hu ◽  
Hong Wei Hu ◽  
Chuan Hu
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Simulation Training ◽  
Power Transmission ◽  
Training System ◽  
System Structure ◽  
Training Effect ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Inspection Work

Inspection work on power transmission line is an important link in the safe production of electric power, inspection staff training has always been attention of the power industry researchers. In order to improve learners training effect, we put forward a new form of teaching to inspect transmission lines with combined with simulation training. This paper analyzes the transmission line inspection requirements and the corresponding functions of the simulation system and the corresponding, then introduces the system structure, the abstract simulation training process, finally give the system application examples. Application results show that the 3D simulation training system of the power transmission line inspection can effectively guarantee training effect on the transmission line inspection technology.

scholarly journals Enhanced analytical model of power transmission line icing

2018 ◽  
Vol 11 (3) ◽  
pp. 222-226
Author(s):  
M. V. Timofeeva
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Transmission Line ◽  
Analytical Model ◽  
Transmission Lines ◽  
Wind Direction ◽  
Power Transmission ◽  
Weather Conditions ◽  
Power Transmission Line ◽  
Power Transmission Lines

Accidents in power transmission lines under icing conditions, in particular, those of cables, cause a great economic damage in Russia. Because of the lack of the possibility to forecast and evaluate reliably the consequences of weather conditions contributing to icing of transmisison line cables, power grid services often have to go to the place of a potential accident relying on guesswork. This leads to considerable losses of time and material resources, while the average recovery time of a damaged high voltage power transmission line is 5–10 days.For the effective prediction and timely prevention of negative consequences of icing of on power line cables, an analytical model that describes the growth of ice on the surface of the electrical cable has been developed. The model is based on a widely applicable analytical model of [1], supplemented with dependence of the growth of ice sleeve on the angle between the wind direction and the cable, and on the electric field strength of the cable.The results obtained using the new analytical model and the [1], model have been compared and show that as the angle between the wind direction and the cable decreases, the intensity of the ice growth decreases significantly. At the same time, the strength of the electric field of the cable affects negligibly the trajectory of water droplets.A conclusion is drawn about insignificance of electrical field strength of the electric cable as a factor of growth of ice deposits. It is stated that the ice thickness value obtained using the developed model can be increased under specific weather conditions and design parameters of transmission lines. The obtained model can be improved by using other physical effects that affect icing of electric cables. Further, the model can be introduced in operation of energy companies to monitor the condition of power transmission lines and to carry out anti-icing activities.

scholarly journals Review on solar disturbance studies and electric power transmission line fault in Malaysia

2020 ◽  
Vol 17 (1) ◽  
pp. 118
Author(s):  
Mohammad Zakaria Mohd Alias ◽  
Mariyam Jamilah Homam ◽  
Faridah Hanim Mohd Noh
Keyword(s):  
Transmission Line ◽  
Electric Power ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Geomagnetically Induced Current ◽  
Fault Recorder ◽  
Solar Disturbances ◽  
Electric Power Transmission Lines

<span lang="EN-GB">This work is a review on previous research and studies on the solar disturbance activities and faults that occur on the electric power transmission line. Research has shown that low latitude regions could also be affected by solar disturbance events. The effects of these events on earth are considerable and may cause electric power transmission failure. Geomagnetically induced current is one of the ground impacts to the transmission line, which may cause fault or disturbance and consequently power system failure. Solar disturbance data from magnetometers and electric power transmission line fault data from a digital fault recorder are reviewed in this work. These data would be valuable in determining the characteristics and effects of solar disturbances on Malaysia’s electric power transmission lines.</span>

Design of a Robot Applied to Inspection of Power Transmission Lines

2014 ◽  
Vol 590 ◽  
pp. 551-555 ◽  
Author(s):  
Antoine Mahouin ◽  
Rogério Sales Gonçalves
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Complete Solution ◽  
Robotic System ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Mechanical Part ◽  
Total Project

This paper describes the process of designing the mechanical part of a robotic system able to travel autonomously on power transmission lines, to inspect them. Such a robot has to do more than just rolling on the power transmission line. Obstacles are plenty on these hundreds of kilometers long cables, and towers are regularly standing along the line. Solutions to solve this problem have already been proposed by many researchers, but none of them entirely managed to achieve a complete solution of the problem. As a part of the total project, this work does not have for ambition to solve the entire problem, but to bring new elements of solutions. First is performed a revision of existing robots. After, is presented the robot characteristics and finally a first prototype of the robot is presented.

Sign in / Sign up

Export Citation Format

Share Document