It is shown that full-scale application of regenerative breaking in electric trains with asynchronous motors is has a large effect on electric-power efficiency in the traction power-supply system of the Moscow Metro. Particular lines of the Moscow Metro were considered (Filevskaya, Arbatsko-Pokrovskaya, Butovskaya, Kol'tsevaya), where trains are equipped with asynchronous motors of 81-740/741 Rusich series. The lines are able to save up to 10 12% of the traction energy in the regenerated energy. It is suggested to use a system of stationary energy storage to improve the efficiency of regenerative braking. A stationary uncontrolled storage system based on storage modules produced by the Russian company Elton was selected from among the multiple existing types of storage systems. A scheme of stationary energy-storage system for use in the traction power-supply system of the Moscow Metro is described. Electrotechnical characteristics of the storage system and its performance features and functionality are presented. The power indices of the stationary energy-storage system were measured experimentally for normal operation at a traction substation of the Filevskaya line of the Moscow Metro over several months. Maximum levels of the regenerated energy and the cycle and efficiency ratio were determined. Long-term monitoring of the normal operation confirmed high reliability of stationary energy storage. Every system, including the switching elements; diagnostic and control systems of storage modules; and control and signaling systems, including those at the dispatching office; operated in a failsafe fashion. The stationary energy-storage system exhibited more positive effects, such as stabilization of voltage at the traction substation bus and possible lower rated power capacity of a traction substation as an effect of a smooth power consumption. It is also possible to bring a train containing passengers from a tunnel to the nearest station in case of external power-supply failure. The correlation between the theoretical calculations and the experimental measurements is displayed.
Performance Indices of Stationary Energy Storage in the Traction Substations of the Moscow Metro
Russian Electrical Engineering ; 85 , 8 ; 493-497
2014
5 Seiten, Bilder, Tabellen, 5 Quellen
Article (Journal)
English
Engineering Index Backfile | 1950
|Rectifiers for railway-traction substations
Tema Archive | 1979
|Evolution of electric traction substations
Engineering Index Backfile | 1939
|Moscow Metro : a pictorial guide
SLUB | 1980
|London Underground and Moscow Metro
Online Contents | 1997
|