Integrated power supply network architecture for railway power system and cooperative control method thereof

Abstract

The invention provides an integrated power supply network architecture for a railway power system and a cooperative control method thereof. The integrated power supply network architecture is characterized in that the integrated power supply network architecture comprises a traction transformer, an uplink power supply arm, a downlink power supply arm, a left-right migration type energy router EMR, a railway power supply and distribution network and a network interconnection type backbone router NCBR, wherein the traction transformer and the uplink and downlink power supply arms supply power to up and down trains; the EMR is used for connection of the uplink and downlink power supply arms of the same traction transformer and connection of power supply arms between different traction transformers; and the NCBR is connected with a railway traction 27.5-kV power supply network, realizes conversion into a three-phase three-wire 10-kV or 35-kV power supply, is connected to the railway power supply and distribution network and supplies power to loads in the railway power supply and distribution network. According to the invention, the cooperative operation of the integrated power supply network architecture of the railway power system is realized through traction state, a braking state and power supply state control.

Description

technical field [0001] The invention relates to the technical field of railway power system power supply, in particular to an integrated railway power system power supply network architecture and a collaborative control method thereof. Background technique [0002] The railway power system generally consists of a railway traction power supply system (27.5kV single-phase power supply) and a railway power supply and distribution system (10kV or 35kV three-phase three-wire power supply). [0003] The power source of the railway traction power supply system: 110kV or 220kV of the public grid is transformed into 27.5kV by a transformer, and the 27.5kV is divided into two power supply arms, uplink and downlink, to supply power for uplink and downlink locomotives. Moreover, there are sections between the upper and lower bridge arms of the same railway traction substation, and there is no direct connection. There are sections between the power supply bridge arms of different tracti...

AI Technical Summary

Problems solved by technology

[0006] After the power supply of the existing railway power supply and distribution system is in operation, its power supply continuity and reliability are affected by the public power grid

Too long lines lead to poor power supply quality, which can easily cause no-load capacitance effects and operating overvoltages

The operation and maintenance of the line is also facing great difficulties. Once a fault occurs, it will take a long time to locate and troubleshoot the fault

[0007] In addition, after the power supply of the existing railway power supply and distribution system is running, the line loss wastes a lot of energy and electricity costs every year

[0008] The traction transformer of the railway traction substation outputs the uplink and downlink bridge arms to supply power to the railway locomotive, and when the locomotive is running, due to single-phase power supply, the current of the uplink and downlink bridge arms is unbalanced, and the traction transformer faces the risk of imbalance. Exacerbated losses in traction transformers

[0009] The traction transformer of the railway traction substation outputs the uplink and downlink two bridge arms to supply power for the railway locomotive, and the railway locomotive generates power in the opposite direction when braking, which can easily cause short-term overvoltage in the railway traction power supply system

[0010] The railway traction substation and the railway power supply and distribution station are constructed separately, and are operated and maintained independently by different personnel, which consumes a lot of manpower, material resources and financial resources

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