Abstract
Proper busbar selection based on analytical calculations is of great importance in terms of power grid functioning and its safe usage. Experimental tests concerning busbars are very expensive and difficult to be executed. Therefore, the great advantage for setting the valid parameters for busbar systems components are analytical calculations supported by FEM (finite element method) modelling and analysis. Determining electrodynamic forces in busbar systems tends to be crucial with regard to subsidiary, dependent parameters. In this paper analytical calculations of asymmetric three-phase busbar system were carried out. Key parameters, like maximal electrodynamic forces value, mechanical strength value, busbar natural frequency, etc., were calculated. Calculations were conducted with an ANSYS model of a parallel asymmetric busbar system, which confirmed the obtained results. Moreover, showing that a model based on finite elements tends to be very helpful in the selection of unusually-shaped busbars in various electrotechnical applications, like switchgear.
Highlights
The development of realistic design procedures involving busbar systems, responding to the mechanical loads associated with fault current impact, was a recurrent problem throughout the history of the power industry
This work is consisted of analytical model and numerical model were compared in order to determine the best solutions for designing three-phase busbar system considering electrodynamic forces impact on the tested layout
Taking into account the relationships previously determined concerning the impact of the variability of the short circuit current on the values of the electrodynamic forces, it can be assumed that the most important forces act on the average current circuit
Summary
The development of realistic design procedures involving busbar systems, responding to the mechanical loads associated with fault current impact, was a recurrent problem throughout the history of the power industry. The second group of solutions used for calculations are called peripheral methods These methods allow determining the electrodynamic interactions with regard to cross-section and current variability in both parallel and perpendicular layout of current circuits [4]. This work is consisted of analytical model (derived by classic calculations of electrodynamic forces) and numerical model (made using FEM) were compared in order to determine the best solutions for designing three-phase busbar system considering electrodynamic forces impact on the tested layout. The last section concludes the work gathering all of the knowledge coming from this research
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