Enemies of the State? The Alberta Energy and Utilities Board, Landowners, Spies, a 500kV Transmission Line and Why Procedure Matters

2008 ◽  
Vol 26 (2) ◽  
pp. 234-266 ◽  
Author(s):  
Alice Woolley
Keyword(s):  
Transmission Line ◽  
The State

scholarly journals Simulation Model and State Analysis of Ship Transmission Line

2018 ◽  
Vol 25 (s3) ◽  
pp. 36-42
Author(s):  
Yanzhe Hu ◽  
Mengjie Xu ◽  
Yang Li
Keyword(s):  
Transmission Line ◽  
Simulation Model ◽  
Normal State ◽  
Short Circuit ◽  
The State ◽  
Sudden Increase ◽  
Line System ◽  
Voltage Signal ◽  
Fault State ◽  
Sudden Load

Abstract In order to discuss the simulation model of the ship transmission line and the state of the transmission line, an early fault model is built according to the evolution principle of the short circuit fault of the transmission line and combining with the fault characteristics of the early fault. A small distributed ship transmission line system is built in MATLAB/ Simulink. Then, combined with the constructed fault module, the original short circuit module, and the load module, the various states (normal state, early fault state, severe early fault state, short circuit state) of the ship transmission line are stimulated, and the features of voltage signal in each state is analysed. It is concluded that, due to the normal operation of the ship transmission line system, the variation characteristics of the flow signal and voltage signal caused by the sudden load mutation, that is, the sudden load and the sudden increase load, are very similar to the changes caused by the early fault. Therefore, in order to find a more accurate early fault detection method, the state is divided into normal state, sudden load state, sudden increase and sudden decrease load state.

Research on Frequency Electromagnetic Field of Parallel Transmission Line

2014 ◽  
Vol 986-987 ◽  
pp. 1992-1995
Author(s):  
Hong Ying Cao ◽  
Bo Tang ◽  
You Xian Peng ◽  
Yu Li ◽  
Bin Chen
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Transmission Line ◽  
Transmission Lines ◽  
The State ◽  
National Standards ◽  
Power Lines ◽  
Three Gorges ◽  
Parallel Transmission ◽  
Electric And Magnetic Field

At present the study mainly for frequency electromagnetic field which is based on a single transmission line meanwhile the value must be in line with the requirements of the workers in the country frequency electromagnetic field. However, for parallel transmission line the maximum of frequency electromagnetic field is still to meet the provisions of the state, therefore in this paper studied the parallel transmission lines. Taking the multiple parallel power lines of China Three Gorges University as an example, the values of electric and magnetic field are calculated and the electromagnetic field is measured based on National standards. Then, compare the measured value with theoretical value, verified the correctness of the superposition algorithm.

Transmission Line State Maintenance Expert System Development and Design

2014 ◽  
Vol 1006-1007 ◽  
pp. 1005-1009
Author(s):  
Yao Jun Liu ◽  
Zhuo Li Guo ◽  
Hua Pu Chen
Keyword(s):  
Expert System ◽  
Transmission Line ◽  
Transmission Lines ◽  
System Development ◽  
The State ◽  
Repair Work ◽  
Treatment Measures ◽  
Safety And Reliability ◽  
Operation Stability ◽  
Line Design

When the human to transmission line repair, many potential risks and fault will cannot be found in time, resulting in not by prior treatment measures to ensure the safety and reliability of the power supply. To realize the state overhaul transmission line, can reduce the blindness of maintenance, improve the transmission line operation stability and save a lot of manpower material resources. Transmission line state repair work there are many difficulties, so in the state overhaul transmission line, on the basis of elaborating the transmission line design condition maintenance expert system, in order to improve the transmission lines the state overhaul of work efficiency.

An approach for establishing key parameter system and evaluating the state of transmission line

2015 ◽  
Vol 12 (4) ◽  
pp. 319-326 ◽  
Author(s):  
Ying-jie Yan ◽  
Ge-hao Sheng ◽  
Yu-feng Chen ◽  
Xiu-chen Jiang ◽  
Zhi-hong Guo ◽  
...  
Keyword(s):  
Transmission Line ◽  
The State ◽  
Parameter System ◽  
Key Parameter

scholarly journals Algorithm for determining the tilt of support of electric power supplies by methods of deep learning with video data

Vestnik IGEU ◽  
2020 ◽  
pp. 72-80
Author(s):  
O.V. Limanovskaya ◽  
E.A. Titov ◽  
D.I. Volkova ◽  
A.V. Lemekh
Keyword(s):  
Neural Network ◽  
Transmission Line ◽  
Power Transmission ◽  
Diagnostic System ◽  
The State ◽  
Video Data ◽  
Power Lines ◽  
Power Transmission Line ◽  
State Of Power ◽  
Line Elements

The uninterrupted operation of power lines can only be ensured by constant monitoring of the state of power lines. The most promising direction in the automation of the diagnostics of power transmission lines are robotic systems, such as UAVs with video cameras mounted on them or robots crawling through wires, used for a detailed analysis of the state of power transmission line elements. The video data received by them is further analyzed by the methods of machine vision and neural networks. One of the defects of power line elements is the deviation of the supports from the vertical. Despite the fact that in a number of works the state of power transmission line supports was determined (fallen supports or not), the angle of inclination of the supports was not calculated. The goal of this work is to develop an algorithm for calculating the angle of inclination of power transmission line supports for the module of the diagnostic system of the CableWalker complex, which is an unmanned aerial platform with the ability to land on a wire and move along it. The YOLO v3 neural network was used to select objects in images. To identify the slope of concrete supports in the obtained bounding rectangles, machine vision methods (Canny, Hough Line, GrabCut algorithm) were used. The algorithm has been developed to identify the objects contained in the image using the YOLO v3 neural network and determine the edges of the supports by building straight lines along them. The angles between the found edges of the support and the horizon (the lower edge of the image) have been calculated as the arctangent of the ratio of the coordinates of the point on the edge of the support. The algorithm has passed laboratory tests which have shown its suitability for use in the diagnostic system of the CableWalker complex. The application of the algorithm reduces the image processing time from several days (in the case of an expert) to several minutes and eliminates the error associated with the human factor.

scholarly journals Reading out the state of a flux qubit by Josephson transmission line solitons

2007 ◽  
Vol 75 (22) ◽  
Author(s):  
Arkady Fedorov ◽  
Alexander Shnirman ◽  
Gerd Schön ◽  
Anna Kidiyarova-Shevchenko
Keyword(s):  
Transmission Line ◽  
The State ◽  
Josephson Transmission Line ◽  
Flux Qubit

Application of Industrial Wireless Switch in the Communication System for Smart Grid

2014 ◽  
Vol 1030-1032 ◽  
pp. 1660-1663
Author(s):  
Jing Tao ◽  
Shi Jun Xia ◽  
Gang Zhang ◽  
Wen Shen
Keyword(s):  
Wireless Communication ◽  
Smart Grid ◽  
Transmission Line ◽  
Communication System ◽  
The State ◽  
Communications Technologies ◽  
State Detection ◽  
Information Collections

Because the State Grid Corporation of China carries out the intelligent grid technologies actively, it is more important to improve the communication system and to apply new communications technologies on the grid. In this paper, we discussed the wireless communication networking modes and the application modes of wireless switches used in different application environments, such as intelligent substations, distribution automations, information collections, the transmission line state detection and so on.

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