Ampacity rating and conductor temperauture calculation of overhead lines

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Dr. Németh Bálint
Department of Electric Power Engineering

Due to the increasing demand for electricity and, for the sake of further economic considerations, it is essential to efficiently use the tools used for the distribution and transmission of electricity, thereby generating cost efficiency and efficiency in the distribution network.

The main pillar of electrical power transmission is the power grid network and the devices therein. At present, the maximum value of power transmitted over a given transmission line is primarily determined by the parameters of the cable. They depend on predetermined external factors. When calculating the maximum permissible power, the worst possible case is calculated, so as to determine a static maximum load for the given phase. If weather conditions, environmental parameters (closed angles, reflections) change, this static loadability is could be much lower than the permissible load.

Observing the dynamic loads of the transmission lines always determines the given maximum transferable power for the given transmission line. Various numeric models are available to examine the relationships between transferable performance and enviromental parameters.

In my dissertation, I present a numerical model that can be used to determine the maximum permissible and transmissible performance, meanwhile we can track the temperature of the conductor.


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