Thyristors current rectifier I-PTE

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. Advantages Application of regenerators allows to: improve metro energy indicators by regeneration of energy released during train braking (having regenerative braking mode in electric rolling stock); reduce overvoltage level occurring during regenerative braking; facilitate metro ventilation modes (studies show that application of dynamic braking dissipating the braking energy as heat in resistors leads to a marked increase of power required for metro ventilation); save up to 30% of power consumed by rolling stock, depending on the terrain. 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