Converting unit of capacitor reserves for metro power-supply system

Abstract

Ways of conserving energy in the Moscow metro using capacitor reserves are considered. The scheme of a converting unit for the capacitor reserve is described. The results of simulating the operation of the converter in different variants are presented. Test measurements of the work of electrorolling stock in a recuperation mode and the simulation of the operation of a converter prove the reliability of the new tech niques from the point of view of the functioning of safety system of train movement of automatic speed con trol and signaling, centralization, and blocking.

Electric power accumulators in system of supplying railways with traction energy by direct current

“…Energy accumulating devices of an uncontrolled type are those whose accumulating element is connected to traction sub-station tiers, and the modes of charge or discharge of power accumulators are determined by the conditions of the circulating energy in the traction network and the voltage therein. Energy storage are belong to the type of power accumulators which accumulating element is connected to traction substation tiers due to converting unit, that sets the operating modes of the drive in accordance with the selected algorithm [7]. The choice of type and functionality of power accumulator is determined by the specific conditions of their operation.…”

“…Stationary energy accumulators of an uncontrolled type were installed at two railway sub-station T-23 and T-24 with the main functional purpose of accepting excess energy recovery, ensuring the rolling-out of the rolling stock on its own with the main power disconnected, increasing energy reliability and saving electricity. Experimental operation of storage devices lasted about 1.5 years, but work on the study of drive efficiency was interrupted [8][9][10][11]. To assess the operating results of traction substation and stationary energy storages, a long-term monitoring of the currents and voltages of the objects under investigation was carried out.…”