Comparative Analysis of Calculated and Experimental Current Carrying Capacities of Rail Transit Aluminum Alloy Conductive Rails

Abstract

Objective AAC (luminum alloy conductive) rails are widely used in rail transit power supply systems. However, a significant deviation often exists between the calculated and tested values of the permissible current carrying capacity of AAC rails, which poses inconvenience to engineering design. Therefore, it is necessary to study the relationship between the permissible current carrying capacity and the calculated current carrying capacity of AAC rails. Method Based on the Chapoulie-Rols formula and the thermal balance equation, and the permissible current carrying capacities are calculated for six common AAC rails with different shapes and cross-sections respectively. Subsequently, experiments are conducted to test the permissible current carrying capacities of these six AAC rails. A comparative analysis of the difference is performed between theoretical calculated and experimental test values of the conductive rail current carrying capacity. Result & Conclusion Correction coefficients are introduced into the Chapoulie-Rols formula, which allows for the calculated current carrying capacity closer to the actual permissible current carrying capacity of AAC rails. The rail temperature of AAC rails basically stabilizes after 3 hours of current loading test.

Keywords

• rail transit
• aluminum alloy conductive rail
• current carrying calculation