On-line overhead transmission line And transformer parameters identification based on PMU measurements

2014 ◽  
Author(s):  
Bogdan Vicol
Keyword(s):  
Transmission Line ◽  
Parameters Identification ◽  
Overhead Transmission Line ◽  
On Line

New Methodology of On-Line Monitoring for Transmission Line Galloping

2013 ◽  
Vol 805-806 ◽  
pp. 867-870 ◽  
Author(s):  
Yu Sheng Quan ◽  
Enze Zhou ◽  
Guang Chen ◽  
Xin Zhao
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Large Scale ◽  
Online Monitoring ◽  
Large Area ◽  
Monitoring Method ◽  
Overhead Transmission Line ◽  
Additional Equipment ◽  
On Line ◽  
Wire Cross Section

When the overhead transmission line is galloping, a variety of natural disasters occur on the role of the natural conditions, the vibration of conductor is one of the more serious harm to the power system. Over the past decade, as the construction of EHV and UHV, wire cross-section, tension, suspension height and span of overhead transmission lines are increasing, and hence the number of conductor vibration is significantly increased. Vibration in a large scale will led to frequent tripping or even broken line or tower collapses, which cause large area power failures and impact security and stability operation. Online monitoring method for overhead transmission line dancing is mostly needed to add additional equipment, however, once situated on the route environment overlying ice or high winds and other inclement weather, online monitoring is difficult to achieve. This paper presents a method, which is made correlation analysis based on the voltage and current acquired from both ends of the transmission lines, online monitoring of line galloping can be achieved.

scholarly journals Study on overhead transmission line on-line monitoring technology

2016 ◽  
Vol 20 (suppl. 2) ◽  
pp. 383-391 ◽  
Author(s):  
Zhiwang Yang ◽  
Nikola Zivlak ◽  
Ming Xu ◽  
Marko Ljubicic
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Transmission Line ◽  
Monitoring System ◽  
Online Monitoring ◽  
Safe Operation ◽  
Operation System ◽  
Overhead Transmission Line ◽  
On Line ◽  
Artificial Neural Network Ann

paper introduces a new idea for overhead transmission line online monitoring. The basis of the paper has been developed upon years of research conducted by power engineers, and a new advanced transmission line safe operation monitoring system is proposed successfully. Furthermore, we used artificial neural network(ANN) for diagnosis examples, to prove the feasibility and effectiveness of the advanced transmission line safe operation system.

New Methodology of On-Line Monitoring for High Voltage Overhead Transmission Line Icing

2013 ◽  
Vol 805-806 ◽  
pp. 871-875
Author(s):  
Yu Sheng Quan ◽  
En Ze Zhou ◽  
Hua Gui Chen ◽  
Xin Zhao
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Large Scale ◽  
Economic Benefits ◽  
Large Area ◽  
Power Outage ◽  
Overhead Transmission Line ◽  
Additional Equipment ◽  
On Line ◽  
Current Monitoring

In recent years,transmission lines icing leads to failure and accidents,such as large area ice flashover, fittings damaged, line dancing, pole (tower) failure, lines breakage even large-scale power outage, causing serious threat to grid. Nowadays, icing monitoring system mainly relies on detecting the meteorological parameters and the changes of dynamic characteristics for early warning, but the methodologies need additional equipment for data collection. In order to ensure the security and reliability of the grid, a safe, effective and economical methodology of monitoring transmission lines icing has great significance. The project proposed a Transmission Line Icing monitoring principle and algorithm, the method based only on the voltage and current from both ends of transmission lines can be generated dynamically monitoring criterion line icing. According to the criterion maximum, line icing center area, extent and severity can be recognized. The criterion of the method is used as a mathematical scanner, swept from one end of the line to the other end, comprehensive judgments are made on the basis of comprehensive criteria for integrated maximum value, thus the method has a high diagnostic accuracy and reliability. The methodology proposed in this paper is different from the current monitoring methodology; additional hardware devices are not required, and the methodology is simple and practical, has strong operability and enormous economic benefits, adapting to the requirements of the development of the smart grid.

scholarly journals Study on Energy Acquisition Scheme and Parameter Optimization for Double-Insulated Ground Wire of Overhead Transmission Lines

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Lifu He ◽  
Bo Li ◽  
Guoyong Zhang ◽  
Xiudong Zhou ◽  
Jing Luo
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Equivalent Circuit Analysis ◽  
Load Impedance ◽  
Grounding Resistance ◽  
Overhead Transmission Line ◽  
Acquisition Scheme ◽  
On Line ◽  
Energy Acquisition ◽  
Analysis Models

An energy acquisition system for the ground wire of an overhead transmission line can provide a continuous and stable power supply for an on-line monitoring device. Its key issue is how to obtain enough power. To solve this problem, an energy acquisition scheme based on the double-insulated ground wire of an overhead transmission line has been investigated in this study. Three energy acquisition schemes were proposed, equivalent circuit analysis models of the three energy acquisition schemes were established, and the maximum power acquired was theoretically analyzed. The energy acquisition power of the three energy acquisition schemes for different tower-type sizes was also analyzed. A simulation model was built in PSCAD. The effects of load impedance, length of energy acquisition wire, grounding resistance, and load current on the power acquired were analyzed. The research results of this paper provide theoretical guidance for choosing an energy acquisition scheme and for designing key parameters in practice.

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