Dynamic Rating of 110 kV Overhead Lines
Main Article Content
Abstract
The paper justifies the need of using, within the 110 kV networks, a dynamic line rating model along the power lines. The work describes in detail the way in which the dynamic line rating is determined, basing the process solely on measurement of the weather conditions. Some aspects related to selection of the numerical values of the coefficients present in the heat model of the power-lines, which is being used to determine the dynamic line rating and the distance between the ground and the conductor, have been described. Subsequent stages of implementation of the system used to determine the dynamic line rating of the power lines have also been described. These include selection of the critical spans of the overhead lines, in case of which risk of exceeding the distance to the crossed-over objects is higher than in case the of the other spans of the very same power line. Additionally, optimal displacement of the weather-reporting stations, that are the source of the data used to determine the dynamic line rating of the lines, has been described. The work also deals with applications of the dynamic line rating for the power line related to the dangerous situation in case of which rime (ice) would be accumulated on the conductors. The forecasting procedures, regarding the load imposed on the power-lines, within a defined time period are also considered by the present paper. Forecasting the permissible load for the power lines is one of the main elements of planning an energy transmission system. Conclusions have been drawn regarding selection of the methodology which is to be used to determine the dynamic line rating, and the way of implementing and using these conclusions within the scope of maintaining the electric energy network.
Article Details
References
P N - E N 5 0 3 4 1 - 1 : 2 0 1 3 - 0 3 E
Elektroenergetyczne linie napowietrzne
prądu przemiennego powyżej 1 kV,
część 1: Wymagania ogólne. Specyfikacje
wspólne.
CIGRE, Paris, Guide for Application of
Direct Real-Time Monitoring System,
Technical Brochure 498, czerwiec 2012.
Babs A., Weather-based and conductor
state measurement methods applied for
dynamic line rating forecasting, 2011 The
International Conference on Advanced
Power System Automation and Protection,
Pekin, październik 2011.
CIGRE, Paris, Systems for Prediction and
Monitoring of Ice Shedding, Anti-Icing
and De-Icing for Overhead Power Line
Conductors and Ground wires, Technical
Brochure 438, grudzień 2010.
Babś A., Samotyjak T., Wyznaczanie
dynamicznego obciążenia linii w oparciu
o model cieplny linii uwzględniający
pomiary stanu linii, Wiadomości
Elektrotechniczne 2011, nr 11.
IEEE Standard for Calculating the
Current-Temperature Relationship of
Bare Overhead Conductors, IEEE Std
-1993, IEEE Standard Board 1993.
CIGRE, Paris, Guide for Thermal Rating
Calculations of Overhead Lines, Technical
Brochure 601, grudzień 2014.