Three-stage Filter Compensating Installation of Traction Network of Alternating Current

Abstract

The description of the three-stage filter-compensating installation (FCI) in the traction AC network with voltage of 25 kV is given. The first stage-sequential inclusion of three LC sections is activated at low and medium loads, the second stage-sequential inclusion of two LC one LC section - at loads greater than the average and the third stage - one LC section - when driving heavy trains. The proposed installation allows providing a given capacity of the railway and reducing power losses in the traction network. When shunting FCI sections with thyristor switches, it is recommended to turn them on in order to reduce the current and voltage surges in the maximum current of the corresponding section. On the positions of the partitioning filter-compensating installation must be performed adjustable with 2–3 levels of power. It is desirable to commute switches, shunt FCI sections, while using the thyristor. In case of three-step FCI, it is advisable to design a traction network 6 – 9 MVAr for posts partition with the average reactive load. Commuting a section of the filter compensating unit should be shorted at zero voltage on the capacitor and the maximum current.