Metro is one of the most important means for ensuring population mobility in large cities. However, having a number of metro advantages: high mobility, environmental friendliness, maintaining city architecture, high security, there is a negative factor — high power consumption.
With passenger transportation volume rising and constant growing of tariffs for electric power, reduction of power consumption by this kind of transport becomes especially actual.
One of the measures to reduce power consumption in metro is the use of metro train braking kinetic power by installation of additional regenerators in traction substations.
Application of regenerators allows to:
Converter sections (hereinafter CS), series I-PTE, produced by Pluton together with dry-type transformers, manufactured by RESIBLOC® technology are applied as regenerators for metro traction substations.
Regenerator CS is a thyristor six-valve bridge, rated current 800 A. 12-pulse inversion circuit is traditionally used, i.e. two sections of 800 A each, switched with a shift of 30 electrical degrees. Total current of two sections is 1600 A.
Such circuit has an advantage in comparison with traditional 6-pulse inversion circuit in terms of harmonic composition of inverted current and voltage.
Regenerator capacity can be expanded by connection of two additional sections to the existing two. It will provide rated current of 3200 A.
CS series I-PTE, were developed and manufactured using the most modern technologies, materials and components from leading world manufacturers. CS are based on power pill thyristors 2760 A, class 28, produced by Dynex. CS cooling is natural or forced air, depending on CS operating conditions.
Generally, existing substations cannot provide regeneration of braking energy due to unidirectionality of their rectifier units. After regenerator installation excess of energy arising during train braking automatically returns to network.
Any time braking energy can be given via regenerator to medium voltage network, transferred over long distances and used by different consumers both auxiliaries (escalators, lighting, ventilation) and outside consumers.
Advantages of thyristor regenerators:
Control system is based on microprocessor module developed by PLUTON. This module fulfills control, diagnostic and protection functions of regenerator.
CS has measuring instruments for input voltage Ud, input current Id and regenerated energy meter.
Please contact us in case you have any technical queries, requests regarding customized procurement or delivery time of equipment.