scholarly journals Determination of isolator damages in electric power transmission lines with continuous wavelet transform and multitape power spectrum density

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tahir Cetin Akinci ◽  
Winston Chung
Keyword(s):  
Wavelet Transform ◽  
Power Spectrum ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Spectrum Density ◽  
Continuous Wavelet ◽  
Power Transmission Lines ◽  
Collection System ◽  
Content Type ◽  
Spectrum Density

PurposeDetection of deformation of devices in high voltage electricity transmission line systems is an important issue in terms of economy and reuse. This study is aimed to detect devices that are deformed or thought to have suffered due to environmental and electrical reasons.Design/methodology/approachIn this experimental study, it was ensured that the sound and deformed insulators used in energy transmission lines were determined by the analysis of the sounds obtained by using the impact method. Equal intensity impact was applied to the isolator using the pendulum and the resulting sound noise signal analyses were made using power spectral density (PSD), magnitude scalogram (MS), multitape power spectrum density (MPSD) and continuous wavelet transform (CWT) methods in the study. In the analysis results, the isolators that are not visible to the eye and have certain damage were successfully separated from the intact insulators. Especially, MPSD and CWT analysis results are quite satisfactory.FindingsDamage analysis of insulators used in electricity transmission lines has been made. A total of 40 insulators were examined in two categories in their group, both damaged and not damaged. Data collection system was established. The data obtained from the data collection system were analysed and compared using four analysis methods. PSD, MS, MPSD and CWT analyses were made in the study. All the analyses carried out generally contain features that distinguish damaged and undamaged insulators from each other, the most successful results are MS and CWT results. CWT results are very successful in terms of time and amplitude, and it has been proposed as a method that can be used to separate damaged and undamaged insulators.Originality/valueIt can be suggested as a result of experimental tests that the results of CWT analysis can be used in the pulse noise method in isolators to be tested for reuse in electrical power transmission lines.

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.

Accurate fault detection during power swing: compensated line study

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hamed Fasihi Pour Parizi ◽  
Saeed Seyedtabaii ◽  
Mahdi Akhbari
Keyword(s):  
New England ◽  
Transmission Lines ◽  
Large Scale ◽  
Power Transmission ◽  
Second Harmonic ◽  
Phase Detection ◽  
Power Transmission Lines ◽  
Content Type ◽  
Power Swing ◽  
Bus Networks

Purpose The purpose of this study is to develop an algorithm to accurately detect faults in series capacitor compensated (SCC) power transmission lines. The line fault must be distinguished from stable power swing, compensating unit malfunction and defects on other lines sharing the same bus (external faults). Design/methodology/approach In this regard, an effective fault feature extractor based on the cumulative sum (CUSUM) of the amplified second harmonic of the phase currents is suggested. The features are then applied to an artificial neural network for classification. No-fault cases include stable power swing and several disturbances. Due to the independent analysis of each phase, faulty phase detection is also a by-product. Findings Various fault scenarios are defined, and the algorithm success rate is compared with some newly published methods. Extensive simulations performed over a single-machine infinite bus, a 3-machine, 9-bus and the large-scale New England IEEE 39-Bus networks all indicate that the proposed algorithm can trip the faulty line more quickly and accurately than the contestant algorithms. Originality/value Suggestion of a new algorithm based on the CUSUM of the amplified second harmonic of the phase current for the fault feature extraction that is able to isolate the transmission line internal faults from stable poser swing, line compensating unit malfunction and faults on the adjacent lines connected to the same bus.

scholarly journals Fault simulation in networks with isolated neutral to find the fault location in power transmission lines

2021 ◽  
Vol 2131 (3) ◽  
pp. 032045
Author(s):  
I V Belitsyn ◽  
M I Pestov ◽  
I A Pavlichenko ◽  
A I Belitsyn
Keyword(s):  
Wavelet Transform ◽  
Transmission Lines ◽  
Fault Location ◽  
Power Transmission ◽  
Fault Simulation ◽  
Time Interval ◽  
Temporal Position ◽  
Power Transmission Lines ◽  
Neutral Mode ◽  
Isolated Neutral

Abstract The paper deals with an urgent problem - determining the location of damage to an overhead power transmission line. In particular, the application of the wavelet transform is considered, which makes it possible to localize the temporal position of the frequencies and to determine the time interval of the presence of the frequency in the event of damage to the power line. The paper presents a mathematical model that makes it possible to determine the amplitude-frequency spectrum, by which it is possible to determine the presence of a certain frequency in the signal under study, by which it is possible to determine the fault location. Based on the wavelet transform, the spectra of the current and voltage in the damaged phase in the isolated neutral mode are obtained. It is shown that when the neutral mode is switched, there are no dangerous overvoltage or current surges in the network, and the overvoltage level is reduced.

Renewed war with PKK may risk Turkey's energy security

2015 ◽  
Keyword(s):  
Transmission Lines ◽  
Energy Security ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
The West ◽  
Energy Infrastructure ◽  
Content Type ◽  
Blowing Up ◽  
Target Energy ◽  
Kurdistan Workers Party

Significance The Justice and Development Party (AKP) has abandoned its long-stalled 'peace process' with the Kurdistan Workers' Party (PKK). In response, the PKK has ended its ceasefire, announced it will target energy infrastructure in particular, blowing up power transmission lines and pipelines. This raises the question of whether Turkey can guarantee its own energy security. Impacts As air strikes continue on PKK bases in Iraq, security will deteriorate in the south-east and in the main cities in the west. Uneasy relations with the KRG risk further deterioration in the security situation in Iraq and Syria. Attacks on pipelines running from Baku will further damage Azerbaijan's faltering economy.

FWMR-II: a modular link-type rope-climbing robot with the finger-wheeled mechanism

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Suyang Yu ◽  
Changlong Ye ◽  
Guanghong Tao ◽  
Jian Ding ◽  
Yinchao Wang
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Climbing Robot ◽  
Climbing Robots ◽  
Obstacle Crossing ◽  
Content Type ◽  
Link Type ◽  
Link Module ◽  
High Flexibility

Purpose The rope-climbing robot that can cling to a rope for locomotion has been a popular piece of equipment for some overhead applications due to its high flexibility. In view of problems left by existing rope-climbing robots, this paper aims to propose a new-style rope-climbing robot named Finger-wheeled mechanism robot (FWMR)-II to improve their performance. Design/methodology/approach FWMR-II adopts a modular and link-type mechanical structure. With the finger-wheeled mechanism (FWM) module, the robot can achieve smooth and quick locomotion and good capability of obstacle-crossing on the rope and with the link module based on a spatial parallel mechanism, the robot adaptability for rope environments is improved further. The kinematic models that can present configurations of the FWM module and link module of the robot are established and for typical states of the obstacle-crossing process, the geometric definitions and constraints that can present the robot position relative to the rope are established. The simulation is performed with the optimization calculating method to obtain the robot adaptability for rope environments and the experiment is also conducted with the developed prototype to verify the robot performance. Findings From the simulation results, the adaptability for rope environments of FWMR-II are obtained and the advantage of FWMR-II compared with FWMR-I is also proved. The experiment results give a further verification for the robot design and analysis work. Practical implications The robot proposed in this study can be used for inspection of power transmission lines, inspection and delivery in mine and some other overhead applications. Originality/value An ingenious modular link-type robot is proposed to improve existing rope-climbing robots and the method established in this study is worthy of reference for obstacle-crossing analysis of other rope-climbing robots.

METHOD OF SYNTHESIS OF CLOSED-LOOP SYSTEMS OF ACTIVE SHIELDING MAGNETIC FIELD OF POWER TRANSMISSION LINES

2016 ◽  
Vol 2016 (4) ◽  
pp. 8-10 ◽  
Author(s):  
B.I. Kuznetsov ◽  
◽  
A.N. Turenko ◽  
T.B. Nikitina ◽  
A.V. Voloshko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transmission Lines ◽  
Closed Loop ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Closed Loop Systems ◽  
Active Shielding
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