Comprehensive compensation system for Vv wiring traction substation with out-of-phase and in-phase compatibility

Abstract

The invention discloses a comprehensive compensation system for a Vv wiring traction substation with out-of-phase and in-phase compatibility. On the secondary side of a traction substation, both a leading phase (T1-N) and a lagging phase (T2-N) supplies a traction load with power. The direct current sides of a first static var generator (SVG1) and a second static var generator (SVG2) are arranged in a back-to-back way, the alternating current sides of the SVG1 and the SVG2 are respectively connected with the leading phase (T1-N) and the lagging phase (T2-N) of a Vv traction transformer, the comprehensive compensation system which is compatible with out-of-phase and in-phase structures and easily develops and transforms from an out-of-phase mode to an in-phase mode is formed so as to generate a negative sequence power flow opposite to the traction load, and reactive compensation and harmonic suppression are combined through reasonable control. The application of the system is flexible, in-phase power supply is easy to realize, power phase splitting at the exit part of the traction substation is cancelled, and power supply bottleneck is eliminated.

Description

technical field [0001] The invention relates to the fields of traction power supply and power quality comprehensive compensation for electrified railways, in particular to a comprehensive compensation system compatible with out-of-phase and in-phase for Vv wiring traction substations. Background technique [0002] In recent years, due to the advantages of electric traction in energy saving, land saving, low carbon, and environmental protection, electrified railway, as a modern transportation mode, has played an increasingly important role in railway construction and operation. By the end of 2011, the national railway operating mileage had reached 93,000 kilometers, of which electrified railways accounted for about half, and accounted for more than 80% of the total railway transportation volume. According to the plan, the national railway operating mileage will increase to more than 120,000 kilometers in 2020, and the electrification rate of the railway network will increase ...

AI Technical Summary

Problems solved by technology

In the case of excessive phase separation, the loss of train speed is large, and at the same time, it is easy to cause accidents such as arcing, overvoltage, tripping of substations, and train parking on slopes. Excessive phase separation has become the bottleneck of traction power supply for the entire electrified railway

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