scholarly journals Control strategy for large‐scale fires near power transmission lines and its application

2020 ◽  
Author(s):  
Chuanping Wu ◽  
Jiazheng Lu ◽  
Baohui Chen ◽  
Yu Liu ◽  
Tiannian Zhou ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Control Strategy ◽  
Large Scale ◽  
Power Transmission ◽  
Power Transmission Lines

scholarly journals Fault Detection in Power Equipment via an Unmanned Aerial System Using Multi Modal Data

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 3014 ◽  
Author(s):  
Bushra Jalil ◽  
Giuseppe Riccardo Leone ◽  
Massimo Martinelli ◽  
Davide Moroni ◽  
Maria Antonietta Pascali ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Plants ◽  
Large Scale ◽  
Infrared Imaging ◽  
Power Transmission ◽  
Video Stream ◽  
Power Lines ◽  
Power Transmission Lines ◽  
Ground Station ◽  
Illumination Changes

The power transmission lines are the link between power plants and the points of consumption, through substations. Most importantly, the assessment of damaged aerial power lines and rusted conductors is of extreme importance for public safety; hence, power lines and associated components must be periodically inspected to ensure a continuous supply and to identify any fault and defect. To achieve these objectives, recently, Unmanned Aerial Vehicles (UAVs) have been widely used; in fact, they provide a safe way to bring sensors close to the power transmission lines and their associated components without halting the equipment during the inspection, and reducing operational cost and risk. In this work, a drone, equipped with multi-modal sensors, captures images in the visible and infrared domain and transmits them to the ground station. We used state-of-the-art computer vision methods to highlight expected faults (i.e., hot spots) or damaged components of the electrical infrastructure (i.e., damaged insulators). Infrared imaging, which is invariant to large scale and illumination changes in the real operating environment, supported the identification of faults in power transmission lines; while a neural network is adapted and trained to detect and classify insulators from an optical video stream. We demonstrate our approach on data captured by a drone in Parma, Italy.

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 Power quality in high voltage mains supplying mainline railroads’ traction substations

2019 ◽  
Vol 114 ◽  
pp. 04001
Author(s):  
Yu.N. Bulatov ◽  
A.V. Kryukov ◽  
A.V. Cherepanov
Keyword(s):  
Power Quality ◽  
Transmission Lines ◽  
Large Scale ◽  
Power Transmission ◽  
Short Circuit ◽  
Far East ◽  
Power Transmission Lines ◽  
Quality Factors ◽  
Significant Deterioration ◽  
Traction Substations

The increase in the trains weight and their operation speeds leads to considerable growth of abrupt-variable, non-linear and one-phase traction loads. This, in its own turn, leads to significant deviations, unsymmetry and voltage harmonic distortions in 110-220 kV mains adjacent to traction substations of AC railroads. Significant deterioration in power quality factors is observed in Siberian and Far East regions where 110-220 kV main power transmission lines are immediately adjacent to Transsib traction substations; in this case, in points with lower levels of short circuit power, power quality factors exceed by far the permissible levels. The articles provides the results of studies aimed at solution of power quality enhancement is-sues for mains adjacent to traction substations of Trans-Siberian Railway. To enhance power quality in mains supplying traction substations, smart grid technologies can be used together with multiagent control systems. Technical solutions, based on the results obtained, are proposed that allow to bring the power quality factors to the regulatory values. Due to a big investments amount, an implementation of tar-get program is needed to resolve the large-scale issue of enhancing power quality in mains adjacent to traction substations of AC railroads.

scholarly journals Multi-Criteria High Voltage Power Line Routing—An Open Source GIS-Based Approach

2019 ◽  
Vol 8 (8) ◽  
pp. 316 ◽  
Author(s):  
Michael Zipf ◽  
Samarth Kumar ◽  
Hendrik Scharf ◽  
Christoph Zöphel ◽  
Constantin Dierstein ◽  
...  
Keyword(s):  
Open Source ◽  
Transmission Lines ◽  
Large Scale ◽  
Power Transmission ◽  
Stakeholder Involvement ◽  
Power Line ◽  
Power Transmission Lines ◽  
Large Area ◽  
Hvdc Transmission ◽  
Open Source Gis

The integration of different stakeholders’ perspectives when planning large-scale infrastructure projects such as power transmission lines is becoming increasingly important in the public debate. Partly conflicting interests of stakeholders should be taken into account in order to allow for best possible routing of new lines. Particularly when transmission lines which are bridging large distances are considered, externalities within this complex setting include social, ecological, economical and technical dimensions. An optimal routing of lines may help address different issues, such as public resistance. Models for the investigation of these large-area impacts for optimal route formation often only cover small regions or lack the georeferenced data necessary to quantify different criteria. We develop an open-source approach which allows for transparent and replicable route determination, tracing, and assessment covering the whole of Europe. Therefore, we provide several friction layers with high spatial resolution. Each layer represents a criterion affecting the routing of a power line. Together with the start and end point of a construction project, this allows for creating accumulated cost rasters for various relationships between the weightings of the perspectives which are relevant during line infrastructure routing processes. The present work explains the underlying methods of data collection, processing, and algorithms of data preparation, route generation, and assessment. Subsequently, this approach is verified with two case studies of HVDC transmission lines which are currently in the planning stages. All processed datasets and applied scripts described in this paper are open-access and made publicly available. Hence, this should support the current project routing debate by providing more transparency and by improving stakeholder involvement.

scholarly journals Evaluation of Energy Price Liberalization in Electricity Industry: A Data-Driven Study on Energy Economics

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7511
Author(s):  
Tayebeh Sadat Tabatabaei ◽  
Pedram Asef
Keyword(s):  
Energy Consumption ◽  
Transmission Lines ◽  
Large Scale ◽  
Power Transmission ◽  
Energy Price ◽  
Power Transmission Lines ◽  
End User ◽  
Control Cost ◽  
Vector Autoregressive ◽  
Consumption Intensity

This study aims to evaluate the effects of price liberalization on energy consumption intensity, because price liberalization leads to improved productivity, energy consumption management, and consumption reform. Although the energy consumption of large-scale factories and industries has increased dramatically, and the energies losses have an increment in the power transmission lines, this policy can result in decreasing the energy consumption intensity due to the changes in consumption patterns. If there is a correlation between two variables, the price can be a valid variable to control cost and increase consumption efficiency. The augmented Dickey–Fuller (ADF) and the Chi-squared tests are also employed to investigate the maneuverability of these variables in the first-order contrast. In this case study, the energy consumption intensity response to price changes using the data gathered between 1988–2020, has gained a confidence interval of these reactions at 95%. The proposed vector autoregressive (VAR) model has forecasted the action and reaction of the end-user, to investigate the future shocks between 2020–2050, considering a new price shock, in the Iranian energy market for the first time. The research findings have shown that energy price liberalization leads to the energy intensity improvement, however, the end-user (shocking) reactions should be investigated to implement a more sustainable policy that eases the new energy price rises.

Opportunities and Challenges of Wind Power Generation in China

2014 ◽  
Vol 521 ◽  
pp. 850-854 ◽  
Author(s):  
Qian Han ◽  
Asifujiang Abudureyimu
Keyword(s):  
Wind Power ◽  
Transmission Lines ◽  
Large Scale ◽  
Manufacturing Industry ◽  
Power Transmission ◽  
Power Grid ◽  
Power Grids ◽  
Power Transmission Lines ◽  
Growth Trend ◽  
Grid Connection

China's wind power market development is set to continue its growth trend of 2011. The newly added installed capacity will be in the range of 15-18GW and is expected to reach approximately 18GW. By 2015, the installed wind power capacity will reach 100GW. The percentage of decentralized wind power will further increase, but large-scale development and land-based wind power development will still be the focus, while the ratio of decentralized wind power has the potential to reach a maximum of 30%. As power grid corporations continue to improve their ultra-high voltage power transmission lines, intelligent power grids and other infrastructure, the power grids' ability to absorb wind power electricity on a largescale, and the scale of cross-region wind power transmission will increase, with the wind power grid-connection rate also significantly increase. The wind power manufacturing industry has entered a low-profit era; competition will intensify, the market will become more mature, and wind power manufacturers will face greater market challenges. However, the wind power industry's maturity and lowering costs have enhanced wind power's competitiveness compared to traditional energy sources. Wind power has become a highstrength emerging power supply technology and its contribution to China's electricity mix will gradually increase.

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
Sign in / Sign up

Export Citation Format

Share Document