Influence of practical operation of power transmission lines on line length

2014 ◽  
Author(s):  
Qi Wang ◽  
Han Zhang ◽  
Shen Wen ◽  
Gehao Sheng ◽  
Xiuchen Jiang ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Line Length ◽  
Power Transmission Lines ◽  
Practical Operation ◽  
On Line

scholarly journals Fault Location on Series Compensated Power Transmission Lines Using Transient Spectrum

2018 ◽  
Vol 7 (3.6) ◽  
pp. 286 ◽  
Author(s):  
C R. Jayamurthi ◽  
A Sowmiya
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Fault Location ◽  
Power Transmission ◽  
Electronic Devices ◽  
Line Length ◽  
Power Transmission Lines ◽  
Smart Power ◽  
Two Sides ◽  
Circuit Power

A Transmission line fault locality analyzing process for multi-circuit power transmission series compensated line up with phasor records as of smart electronic devices available at both split ends. During the case of unavailability of synchronize records, logical synchronization is acquire by means of an operative. During the power transmission process, the techniques consider untransposed line segment ensuing on top of two side of the power fault with the dispersed environment of transmission line. In favor of in the pink phase, current on two sides flow at the fault position be identical unlike exceptional current on two sides in a fault phase. This be checkered in excess of the line length along with the fault location is identify. The technique does not need the model of the series recompense located by at all locality on the line along with be capable of be use for both internal and external-circuit fault. It as well reflects on reactive element of the fault impedance for accurate fault position. The technique is analyzed with PSCAD/EMTDC simulation used for a multi-circuit series-compensated line in Indian smart power grid. Estimation revise confirm the strength of the technique used for different faults. 

scholarly journals Research on Temperature Monitoring Method of Cable on 10 kV Railway Power Transmission Lines Based on Distributed Temperature Sensor

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3705
Author(s):  
Kai Chen ◽  
Yi Yue ◽  
Yuejin Tang
Keyword(s):  
Transmission Lines ◽  
Temperature Sensor ◽  
Power Transmission ◽  
Element Model ◽  
Power Cable ◽  
Operational Experience ◽  
Power Cables ◽  
Power Transmission Lines ◽  
Monitoring Method ◽  
On Line

Railway power transmission lines (RPTL) are power lines that provide nontraction power supply for railways, such as communications and signals along the railway. With the advancement of technology, power cables are being used more and more widely. Operational experience has shown that during the operation of power cables, abnormal heat is often caused by fault factors such as poor joint crimping and severe partial discharge caused by insulation defects, leading to cable burns in extreme cases. Distributed temperature sensors (DTS), a kind of spatial continuous temperature sensor using sensing optical fiber, can measure the temperature along the cable and are expected to realize on-line monitoring and positioning of cable heating faults. This paper first builds a finite element model of the cable under various faults to calculate the distribution characteristics of the temperature field of the faulty cable. Then the results are verified through experiments with the external sensing fiber and the artificially manufactured heating points of the cable. The conclusions show that it is feasible to use a distributed sensing fiber to monitor and locate the heating fault of power cable.

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

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.

scholarly journals Decentralized Estimation of Two-port Equivalents for Power Transmission Lines

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Vedanta Pradhan ◽  
O. D. Naidu ◽  
Sinisa Zubic ◽  
Patrick Cost
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Decentralized Estimation
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