Assessment of State of Urban Power Supply Systems’ Power Transmission Lines on the Basis of Indicative Analysis

2013 ◽  
Vol 291-294 ◽  
pp. 2143-2148 ◽  
Author(s):  
Stepan A. Dmitriev ◽  
Sergey E. Kokin ◽  
Alexandra I. Khalyasmaa
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Power Networks ◽  
Optimal Development ◽  
Weak Points ◽  
Methodological Approaches ◽  
Supply Systems

The article deals with the problem of the optimal development of urban power supply systems. The article offers various methodological approaches to discovering weak points of the existing power networks, as well as most effective ways of pinpoint actions in the situation of shortage of information and funding.

Analysis of mathematical models of transmission lines.

2020 ◽  
Vol 23 (2) ◽  
pp. 16-19
Author(s):  
G. SHEINA ◽  
Keyword(s):  
Mathematical Model ◽  
Power Systems ◽  
Transmission Lines ◽  
Power Supply ◽  
Power Supply System ◽  
Power Transmission ◽  
Supply System ◽  
Power Lines ◽  
Power Transmission Lines ◽  
The Mathematical Model

This paper investigates a mathematical model of one elements of the power supply system - power transmission lines. The type of models depends on the initial simplifications, which in turn are determined by the complexity of the physics of processes. The task of improving the accuracy of modeling of emergency processes in the power system is due to the significant complexity of modern power systems and their equipment, high-speed relay protection, automation of emergency management and the introduction of higher-speed switching equipment. One of the reasons for a significant number of serious emergencies in the system is the lack of complete and reliable information for modeling modes in the design and operation of power systems. The development of a mathematical model of a three-phase power line, which provides adequate reflection of both normal and emergency processes, is relevant. The advanced mathematical model of power transmission lines allows to investigate various operational modes of electric networks. The improved mathematical model of the power transmission line reflects all the features of physical processes at state modes and transient process and provides sufficient accuracy of the results. The type of mathematical model of power transmission lines depends on the accepted simplifications, depending on the task of research. The purpose of this work is to analyze the mathematical model of the power transmission line to study the modes of operation of the power supply system, with the possibility of its application to take into account all the design features of overhead and cable power lines. The mathematical model of the power line for the study of the modes of operation of the power supply system is analyzed. It is used to take into account the design features of overhead and cable power lines, skin effect.

scholarly journals Powering Multiple Gas Condensate Wells in Russia’s Arctic: Power Supply Systems Based on Renewable Energy Sources

Resources ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 130
Author(s):  
Gennadiy Stroykov ◽  
Alexey Y. Cherepovitsyn ◽  
Elizaveta A. Iamshchikova
Keyword(s):  
Renewable Energy ◽  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Renewable Energy Sources ◽  
Operating Conditions ◽  
Gas Condensate ◽  
The Arctic ◽  
Power Transmission Lines ◽  
Power Sources

Using renewable energy off-grid power supply and choosing the right equipment that meets the operating conditions in the Arctic can provide companies with reliable power sources for producing gas at facilities located in remote areas and will reduce capital and operating costs associated with the construction of power transmission lines. For more than 15 years, a remote control system powered by renewable energy has been used in parallel with power transmission lines by Gazprom to operate its multiwell pads in Russia’s Far North, which validates the relevance of this study. The subject of the study is a group of gas condensate wells that consists of four multiwell pads operated by Wintershall Russland GmbH. The article discusses a stand-alone renewable-based power system as an option for powering remote oil and gas production facilities. The procedures used in the study include calculating such parameters as power output and power consumption, choosing equipment, describing the design features of a power supply system for a multiwell pad, conducting an economic assessment of the project, comparing different power supply options, analyzing project risks, and developing measures to mitigate these risks.

scholarly journals Insulator Segmentation for Power Line Inspection Based on Modified Conditional Generative Adversarial Network

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Zishu Gao ◽  
Guodong Yang ◽  
En Li ◽  
Tianyu Shen ◽  
Zhe Wang ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
State Of The Art ◽  
Power Line ◽  
Power Transmission Lines ◽  
Generative Adversarial Network ◽  
Convolutional Network ◽  
Adversarial Network ◽  
Feature Information

There are a large number of insulators on the transmission line, and insulator damage will have a major impact on power supply security. Image-based segmentation of the insulators in the power transmission lines is a premise and also a critical task for power line inspection. In this paper, a modified conditional generative adversarial network for insulator pixel-level segmentation is proposed. The generator is reconstructed by encoder-decoder layers with asymmetric convolution kernel which can simplify the network complexity and extract more kinds of feature information. The discriminator is composed of a fully convolutional network based on patchGAN and learns the loss to train the generator. It is verified in experiments that the proposed method has better performances on mIoU and computational efficiency than Pix2pix, SegNet, and other state-of-the-art networks.

A Novel Power Supply of Online Monitoring Systems for Power Transmission Lines

2010 ◽  
Vol 57 (8) ◽  
pp. 2889-2895 ◽  
Author(s):  
Lin Du ◽  
Caisheng Wang ◽  
Xianzhi Li ◽  
Lijun Yang ◽  
Yan Mi ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Online Monitoring ◽  
Power Transmission ◽  
Monitoring Systems ◽  
Power Transmission Lines

scholarly journals Allocation of 0.4 kV PTL Sectionalizing Units under Criteria of Sensitivity Limits and Power Supply Reliability

2021 ◽  
Vol 11 (24) ◽  
pp. 11608
Author(s):  
Alina Vinogradova ◽  
Alexander Vinogradov ◽  
Vadim Bolshev ◽  
Andrey Izmailov ◽  
Alexey Dorokhov ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Short Circuit ◽  
Reducing Power ◽  
Power Transmission Lines ◽  
Electrical Networks ◽  
The Cost ◽  
The Impact ◽  
Supply Reliability

Sectionalizing 0.4 kV power transmission lines (PTL) improves power supply reliability and reduces electricity undersupply through the prevention of energy disconnection of consumers in the event of a short circuit in the power line behind the sectionalizing unit (SU). This research examines the impact of sectionalizing on power supply reliability and reviews the literature on sectionalizing unit allocation strategies in electrical networks. This paper describes the experience of the use of sectionalizing units with listing strengths and weaknesses of adopted technical solutions and describes the new structure of sectionalizing units. A new methodology is proposed, whereby there are two criteria for allocating SU in 0.4 kV power transmission lines. The first criterion is the sensitivity limits against single-phase short circuits used for calculating the maximum distance at which SU can be installed. The second criterion is power supply reliability improvement, evaluating the cost-effectiveness of installing sectionalizing equipment by reducing power supply outage time. The established methodology was put to the test on an actual electrical system (Mezenka village, Orel area, Russia), which demonstrated that the installation of a sectionalizing unit paid off.

scholarly journals Restoring normal network operation mode by automatically disabling network ATS

2020 ◽  
Vol 178 ◽  
pp. 01072
Author(s):  
A.V. Vinogradova ◽  
A.I. Psarev ◽  
A.V. Vinogradov ◽  
V.E. Bolshev ◽  
M. Jasinski ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Load Transfer ◽  
Power Transmission ◽  
Operation Mode ◽  
Power Transmission Lines ◽  
Initial State ◽  
Power Sources ◽  
Normal Network ◽  
Network Operation

Automatic sectionalizing and redundancy of power transmission lines is one of the conditions for network intellectualization and can significantly reduce the power supply interruption time for rural consumers. However, both sectionalizing and redundancy of power transmission lines in 0.4 kV electric networks are used extremely limitedly since there are no sufficiently effective methods and technical means for their implementation. This article presents a method to automatically deactivate the automatic load transfer switch when restoring the normal network operation mode. The paper considers the implementation of the method on the example of damage occurring in the network where power is supplied to consumers from two power sources using an automatic load transfer switch and two sectionalizing units. A device is developed which allows implementing the developed method of automatic load transfer switch deactivation. The device consists of sectionalizing unit, automatic load transfer switch, voltage presence sensor, power direction sensor, memory element, repeater element, element AND and 3 elements NOT. The work of the device is described. The proposed method for automatically disconnecting the automatic load transfer switch in order to return the consumers’ power supply circuit to its initial state solves the problem of eliminating unreasonable power supply interruptions for consumers.

scholarly journals Analysis of the Power Supply Restoration Time after Failures in Power Transmission Lines

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2736 ◽  
Author(s):  
Alexander Vinogradov ◽  
Vadim Bolshev ◽  
Alina Vinogradova ◽  
Michał Jasiński ◽  
Tomasz Sikorski ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Electrical Network ◽  
Power Transmission Lines ◽  
Electrical Networks ◽  
Distribution Grid ◽  
Time Intervals ◽  
Restoration Time ◽  
Information Recognition

This paper presents the analysis of power supply restoration time after failures occurring in power lines. It found that the power supply restoration time depends on several constituents, such as the time for obtaining information on failures, the time for information recognition, the time to repair failures, and the time for connection harmonization. All these constituents have been considered more specifically. The main constituents’ results values of the power supply restoration time were analyzed for the electrical networks of regional power supply company “Oreolenergo”, a branch of Interregional Distribution Grid Company (IDGC) of Center. The Delphi method was used for determining the time for obtaining information on failures as well as the time for information recognition. The method of mathematical statistics was used to determine the repair time. The determined power supply restoration time (5.28 h) is similar to statistical values of the examined power supply company (the deviation was equal to 9.9%). The technical means of electrical network automation capable of the reduction of the power supply restoration time have also been found. These means were classified according to the time intervals they shorten.

On damage rate of overhead power transmission lines in power supply systems

2021 ◽  
Vol 14 (2) ◽  
pp. 92-99
Author(s):  
I. V. Naumov ◽  
D. N. Karamov
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Distribution Networks ◽  
Power Transmission Lines ◽  
Electrical Networks ◽  
Electric Networks ◽  
Operating Personnel ◽  
Damage Rate ◽  
Overhead Power Transmission Lines

The purpose of the article is to analyze the damage rate of overhead power transmission lines (OPL) in medium-voltage electrical distribution networks of the Irkutsk region. The established International Indices that determine the level of reliability of the functioning of electric networks are considered, and information on the compliance of the condition of electric networks in Russia with these indices is analyzed. Analytical information on the damage rate of elements of these networks and their causes in Europe, America, and Russia is presented. The emphasis is placed on the fact that the most common damage is characteristic of overhead power lines, especially 6–10 kV lines. As an object of research, two branches of the Irkutsk electric grid company (IEC) were taken, one of which provides electricity to rural consumers, the other — mainly to consumers residing in the territory of the city Irkutsk. The characteristics of these electric networks, their territorial location and basic technical data are presented. To conduct analytical monitoring of the level of reliability of overhead power transmission lines, logs of disconnection of the Eastern and Southern electric networks of the IEC over a long-term period were used. On the basis of this information, tables of failures and their consequences in the studied electrical networks were compiled for monthly average data over the period under examination for various causes of damage. To plot time diagrams of the parameters under examination, computer programs were compiled in the Matlab system, the use of which made it possible to obtain visualization of changes in failures for various reasons for the electrical networks under consideration. The information on the time of power supply interruptions in these networks, as well as the amount of electricity underutilized by consumers during these interruptions and its cost are analyzed. It is shown that in the electric networks under consideration, most of the power failures are related to the territorial dispersion of these networks, and the low level of equipment controls and insufficient qualification of operating personnel, as evidenced by the significant number of failures for unknown reasons. Besides, a significant part of the failures is due to damage to the overhead line wires, switching equipment and the effect of wind load. Recommendations for improving the condition of power transmission lines and a number of measures aimed at improving the level of reliability of power supply are presented.

scholarly journals Energy accounting in AC substations in case of transit currents flowing through the contact network

2017 ◽  
Vol 76 (5) ◽  
pp. 294-300
Author(s):  
V. M. Varentsov ◽  
A. I. Bur’Yanovatyy ◽  
M. A. Ivanov
Keyword(s):  
Power Consumption ◽  
Electric Power ◽  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Electric Power Consumption ◽  
Power Transmission Lines ◽  
Traction Network ◽  
External Power ◽  
External Power Supply

The purpose of the work is to clarify the methodology for determining the electric power consumption of traction substations of AC electric power for the transit of external power supply. The conditions for the emergence of significant transit through traction networks of external power supply are revealed. Using the example of the Ushaped scheme for the replacement of power transmission lines, it is shown that the intersystem power fluxes along the electric power transmission lines of the external power supply exert the greatest influence on the transit currents along the traction networks. For analysis, the local and transit components of the power flow are identified and a typical section of the electrical network is considered, containing three electrical connections at voltages of 330, 110 and 27.5 kV. In this case, the most significant factor affecting transit through the traction network is the transverse component of voltage drop, since its compensation in this network is difficult. Methods for estimating the transit current of a traction network are given. An engineering technique for estimating the electric power consumption for transit by software is proposed. Authors show the necessity and possibility of using the KORTES package for estimating transit currents of the traction network caused by external power supply. The results of calculations for two sections of different railways based on the data of the Regional Dispatch Office are presented. The influence of regional and traction loads on the path of transit currents is considered. Obtained relationships and developed methodology allow estimating the electric power consumption of traction substations for the transit of the power of external power supply.

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