Сравнение энергетической эффективности грузовых электровозов переменного тока с коллекторным и асинхронным тяговым приводом

Abstract

Electric locomotives with asynchronous traction drive are operated on the Russian road network in passenger and freight traffic. The advantage of such a drive is a large specific power. At first glance, electricity consumption of an electric locomotive with asynchronous traction drive should be less than that of an electric locomotive with a collector traction drive. The same is declared by manufacturers of traction rolling stock [1, 2]. But the answer to the question which electric locomotive is more economical in freight traffic: with a collector or asynchronous traction drive? - is far from being unambiguous [3, 4, 5]. In order to determine which electric locomotives have the best energy efficiency regarding the traction drive, a comparison of electric energy costs for traction of freight trains by electric locomotives of the VL80S series with collector traction drive, operated in two- and three-section versions, and a promising two-section electric locomotive of the 2ES7 series with asynchronous traction drive was performed. The energy efficiency assessment was carried out using methods based on elements of mathematical statistics and probability theory, including estimation of the distribution parameters of the studied quantities, statistical hypothesis testing and variance analysis. This article presents the main results of the research carried out at the testing area of the Gorky Railway during the pilot operation of the 2ES7 series electric locomotive on the Druzhinino - Vekovka section.