Selection and Heat Dissipation Analysis of Regenerative Braking Energy Absorption Device in Urban Rail Transit Depot

Abstract

[Objective] The regenerative braking energy absorption resistance in urban rail transit depot has a large heat dissipation. In order to effectively solve the problem, it is necessary to select the right type of regenerative braking energy absorption resistance and analyze its heat dissipation capacity. [Method] Based on the deduced calculation method of regenerative braking energy and train operating conditions in the urban rail transit depot, three aspects of the resistance are analyzed in detail, i.e. resistance value selection, type selection and heat dissipation analysis. [Result & Conclusion] Based on the actual train operation conditions in the depot, the calculation and selection method of the braking resistance in the above energy absorption device is proposed. The heat dissipation of the resistance is generally estimated according to the peak power of the device and in view of the characteristics of its intermittent operation. However, as the thermal resistance working condition is not considered in the above-mentioned calculation method, there is a certain degree of deviation between the theoretical calculation value and the actual operation condition. The estimation and verification methods for the heat dissipation power of the device are put forward. Furthermore, a recommended scheme for the braking energy absorption device layout is proposed.

Keywords

• urban rail transit
• depot
• regenerative braking energy absorption device
• equipment type selection
• heat dissipation analysis