Innovative 10–110 kV Compact Controlled Overhead Lines

2018 ◽  
pp. 310-326
Author(s):  
Vitali Mihail Postolati ◽  
Elena Vitalii Bicova
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Fold Increase ◽  
Weather Conditions ◽  
Power Transmission Lines ◽  
Overhead Lines ◽  
Transfer Unit ◽  
Fold Reduction ◽  
Equal Capacity ◽  
Compact Design

This chapter describes how the implementation of compact overhead lines equipped with FACTS devices, including phase angle regulator settings (compact controlled OHL), appears to be one of the most effective ways of power grid development. Compact-design OHL equipped with FACTS have many improvements over previous devices. The devices provide a 1.2-1.6-fold increase in OHL capacity without raising their voltage class. A 1.5–2-fold reduction in the area of land allocated for OHL with equal capacity. An electromagnetic field reduction in the external space, decreasing environmental effects and the impact on people. A 15–30% decrease of total costs per power transfer unit. The total energy loss reduces the power system, increasing OHL mechanical strength under severe weather conditions. Results of the comprehensive research and development in relation to 10–110 kV compact controlled power transmission lines together with theoretical bases, substantiation, and methodological approaches to their practical application and design experience are given in the chapter.

scholarly journals Improvement of energy efficiency of agricultural enterprises through the survey of high-voltage transmission lines using unmanned aerial vehicles

2021 ◽  
Vol 845 (1) ◽  
pp. 012156
Author(s):  
A Y Astapov ◽  
I P Krivolapov ◽  
D V Akishin ◽  
A S Gordeev ◽  
A A Naydenov
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Reliability Factor ◽  
Overhead Lines ◽  
Agricultural Enterprises ◽  
Aerial Vehicles ◽  
Order Of Magnitude ◽  
The Cost

Abstract The paper studies the reliability of transmission lines of Michurinsk district electric lines in Tambov Region. It evaluates the quality of overhead power transmission lines in the support-insulator-wire system and determines the reliability factor of overhead lines. The paper proposes methodological approaches to the survey of power transmission lines using unmanned aerial vehicles. Their use seems quite promising and profitable, since the cost of such work is an order of magnitude lower.

scholarly journals A Thermal Rating Calculation Approach for Wind Power Grid-Integrated Overhead Lines

Energies ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1523 ◽  
Author(s):  
Mengxia Wang ◽  
Mingqiang Wang ◽  
Jinxin Huang ◽  
Zhe Jiang ◽  
Jinyan Huang
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
Transmission Lines ◽  
Power Flow ◽  
Power Transmission ◽  
Wind Farms ◽  
Utilization Efficiency ◽  
Power Transmission Lines ◽  
Overhead Lines ◽  
Wind Power Integration

Currently, the rapid increase in wind power integration in power systems is resulting in an increasing power flow in the grid-integrated power transmission lines of wind farms. The wind power curtailment caused by the current limits (thermal ratings) of the wind power integration overhead lines (WPIOLs) is becoming increasingly common. Aiming at this issue, the influence of conductor heating on the loss of tensile strength (LOTS) and sag of a WPIOL was analyzed in this paper. Then a decision model is proposed for the thermal ratings of WPIOLs, which regards the minimized wind power curtailment as objective and introduces permissible cumulative LOTS and sag of the conductor as constraints. Based on this model, the thermal rating for a WPIOL can be decided to ensure the expected service life of the conductor and safe clearance. In addition, case studies are used to demonstrate that the proposed approach is capable of improving the conservatism of conventional thermal rating calculation and reducing the wind power curtailment by improving the utilization efficiency of WPIOLs.

scholarly journals System for monitoring the parameters of overhead power lines

2021 ◽  
Vol 2086 (1) ◽  
pp. 012059
Author(s):  
V A Listyuhin ◽  
E A Pecherskaya ◽  
O A Timokhina ◽  
V V Smogunov
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
The State ◽  
Measuring System ◽  
Power Lines ◽  
Power Transmission Lines ◽  
Electrical Networks ◽  
Overhead Lines ◽  
Overhead Power Transmission Lines

Abstract The analysis of disturbances (accidents) on overhead power transmission lines and methods and means of the overhead power transmission lines parameters monitoring was carried out. It is shown that the most promising direction for ensuring the required indicators of the reliability of power supply is the development and implementation of information and measurement systems at the facilities of the power supply network complex. The structure of an intelligent information-measuring system for measuring parameters characterizing the state of wires, external factors influencing the state of power lines is proposed. The proposed decision support system will make it possible to promptly identify defective sections of overhead lines, increase the level of technological management of electrical networks.

scholarly journals Method for Calculating of Lightning Impact Level on Overhead Transmission Line

2021 ◽  
Vol 11 (14) ◽  
pp. 6609
Author(s):  
Anton Vladimirovich Burtsev ◽  
Vasily Nikolaevich Selivanov
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Lines ◽  
Power Transmission Lines ◽  
Overhead Line ◽  
Simple Method ◽  
Lightning Strikes ◽  
Overhead Lines ◽  
Overhead Transmission Line ◽  
Murmansk Region

This paper proposes a simple method for calculating the lightning impact level on overhead transmission power lines, taking into account its entire length. The method uses lightning historical data and the geographic coordinates of power line towers. It is based on calculating the distances between both arrays of lightning and of towers. The method has been tested on overhead lines in the Murmansk region of the Russian Federation and can be applied to any overhead line if a lightning dataset in the overhead line area is available. This study is useful for electric power suppliers because it provides valuable information about the most lightning-prone sections of overhead power lines. The method can also be beneficial to people selecting the optimal route (least amount of lightning strikes) for power transmission lines based on lightning density.

scholarly journals Stress-strain state experimental researches of the lattice support pole sections for overhead power transmission line 110 kV

2018 ◽  
Vol 196 ◽  
pp. 02019
Author(s):  
Anton Tanasoglo ◽  
Igor Garanzha
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Joint Work ◽  
Overhead Lines ◽  
Experimental Installation ◽  
Vertical Displacements ◽  
Experimental Values ◽  
Overhead Power Transmission Line ◽  
Experimental Researches

An article compares the theoretical and experimental researches of joint work of steel tower type supports' fragments of overhead power transmission lines (OHPL) 110 kV. Attention is focused to high voltage supports operated on the Ukraine territory. Is described a spending principle of static experimental researches for flat trusses on the developed specialized experimental installation, allowing to investigate the joint work of overhead lines supports' fragments. Are presented the technique and results of the flat support model calculation in the "SCAD" software package. Are presented calculation numerical results of the experimental installation together with a testing model. Are determinated experimental values of stresses in lattice elements and also horizontal and vertical displacements of braces holding on nodes. During the displacements determining is analyzed the joint work of the lattice elements of the experimental samples, is taken into account the supporting effect of the extended braces.

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.

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.

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