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Distributed vs. spot temperature measurements in dynamic rating of overhead power lines.
Distributed vs. spot temperature measurements in dynamic rating of overhead power lines.
- Source :
-
Electric Power Systems Research . May2019, Vol. 170, p273-276. 4p. - Publication Year :
- 2019
-
Abstract
- Highlights • This paper presents a comparison between distributed temperature sensing system (DTS) and spot temperature measurements to estimate the conductor temperature of overhead power lines in order to be used in dynamic rating operation. • The results are validated with the real-time monitoring of a 220 kV line placed in the north-east of Spain with a LA-455 conductor. • In the case studied, spot measurements are enough to obtain a good approximation of the temperature of the line conductor. • Further analysis should be done to check a broader range of load and weather conditions in order to be used in dynamic rating operation. Abstract The increase of global energy demand and new ways of electricity production are two of the main challenges for the power sector. The electric market has to address the addition of new and renewable sources of energy to the energy mix and to be able to integrate them into the grid, while maintaining the principles of robustness, security and reliability [1]. All of these changes point to the creation of smart grids, in which advanced generation, information and communication technologies are needed. An accurate knowledge of the electric grid state is crucial for operating the line as efficiently as possible and one of the most important grid parameters to be measured and controlled is the temperature of the overhead conductors due to their relation with the maximum allowable sag of the line and its thermal limit (annealing). This paper presents the results of real-time monitoring of an overhead power line using a distributed temperature sensing system (DTS) and compares these results with spot temperature measurements in order to estimate the loss of accuracy of having less thermal information. This comparison has been carried out in a 30 km long distributed temperature sensing system with fiber optic inside a LA-455 conductor and 6 weather stations placed along the line. An area of influence is defined for each weather station corresponding to the orography of the surroundings. The spot temperatures are obtained from the DTS in the nearest point from the weather stations assuming these six locations to be the ones where the spot temperature measurement equipment would be located. The main conclusion is that, in the case of study, spot measurements are enough to obtain a good approximation of the average temperature of the line conductor. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03787796
- Volume :
- 170
- Database :
- Academic Search Index
- Journal :
- Electric Power Systems Research
- Publication Type :
- Academic Journal
- Accession number :
- 135054058
- Full Text :
- https://doi.org/10.1016/j.epsr.2019.01.038