55kV static reactive compensation device used for electrified railway AT tractive power supply system

Abstract

The invention relates to the field of electrified railways, in particular to a 55kV static reactive compensation device used for an electrified railway AT tractive power supply system. The device comprises a TCR branch and an FC branch which are connected in parallel, wherein the TCR branch and the FC branch are both directly hung below a 55kV bus. The device is connected between a contact line and a positive feeder of an AT power supply system railway traction network in parallel. An AT power supply system comprises a 55kV traction transformer, the railway traction network, the contact line and the positive feeder. An output end of a secondary side of the 55kV traction transformer is connected with the contact line of the railway traction network, and another output end of the 55kV traction transformer is connected with the positive feeder of the railway traction network. By the adoption of the static reactive compensation device directly hung under a 55kV voltage class, power quality management action of a dynamic compensation device is played to the maximum degree, the service life of the traction transformer is prolonged, stability of the power supply system is improved, and stability and safety of operation of an SVC device are guaranteed through design of a thyristor valve group and the heat pipe cooling heat dissipation technology.

Description

technical field [0001] The invention relates to the field of electrified railways, in particular to a 55kV static var compensation device for an AT traction power supply system of an electrified railway. Background technique [0002] Power quality problems such as harmonics, three-phase unbalance, and low power factor will occur during the operation of electrified railways. For this reason, all countries attach great importance to the governance of the power quality of electrified railways. In the case of heavy-duty transportation, the train load is heavy, and the power quality is even worse. At this time, the governance and control of power quality is more important. The SVC installed in the traction substation can be used to support the voltage of the traction network to improve the traction capacity of the electric railway; due to technical and cost reasons, the SVC devices currently used in the electric railway power supply system in my country are mainly connected in p...

AI Technical Summary

Problems solved by technology

[0003] In view of the power consumption characteristics and power quality problems of the 55kV power supply system of the AT traction substation and the electrified railway, the purpose of the present invention is to provide a 55kV static var compensation device for the AT traction power supply system of the electrified railway to solve the problem based on the AT power supply mode. The power quality problem of heavy-duty railways can effectively improve the low power factor problem of electrified railways, stabilize the voltage at the end of the power supply arm, and provide strong support for the safe and reliable operation of railways

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