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Distributed power supply system and control method for three-phase traction network

A distributed power generation and power supply system technology, applied in the direction of AC network circuits, AC network voltage adjustment, electrical components, etc., can solve problems such as waste, failure to consider new energy and renewable energy power generation schemes, and long power supply lines, etc., to achieve Improve the utilization rate, extend the power supply distance, and improve the effect of regenerative power utilization

Active Publication Date: 2021-11-23
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application number: 201711265295.5 discloses "A Three-phase Traction Power Supply System"), but this application does not consider the scheme of connecting new energy and renewable energy power generation to the three-phase traction power supply system
Due to the linear distribution of the railway, it is bound to cause the power supply line to be too long and wasteful

Method used

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  • Distributed power supply system and control method for three-phase traction network
  • Distributed power supply system and control method for three-phase traction network
  • Distributed power supply system and control method for three-phase traction network

Examples

Experimental program
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Effect test

Embodiment 1

[0034] like figure 1 As shown, this embodiment provides a three-phase traction network distributed power supply system, including the main substation MS, three-phase traction cable TC, traction substation and three-phase traction network TN, the three-phase traction network TN along the railway Laying of running rails, including power supply rail TNa, power supply rail TNb and steel rail TNc, main bus MBa, main bus MBb and main bus MBc of main substation MS are connected to three-phase traction cable TC through feeder Fa, feeder Fb and feeder Fc, The primary side of the traction substation is connected to the three-phase traction cable TC, and the secondary side is connected to the three-phase traction network TN. There are voltage transformers Ya, voltage transformer Yb, and voltage transformers corresponding to the main bus MBa, main bus MBb, and main bus MBc. The transformer Yc is equipped with current transformer La, current transformer Lb, and current transformer Lc corre...

Embodiment 2

[0048] like image 3 As shown, this embodiment provides a control method based on the distributed generation and power supply system of the three-phase traction network in Embodiment 1, which is applied to the central coordination controller CCC and realized through the following technical solutions:

[0049] The methods include:

[0050] The central coordinating controller CCC calculates the total number of power generators according to the installed capacity S1, S2, ..., Si, ..., Sn of n power generators G1, power generators G2, ..., power generators Gi, ..., power generators Gn Installed capacity S, where, S QUOTE ;

[0051] The central coordinating controller CCC measures the real-time total power of the traction network with n power generating devices through the voltage transformer PT, the current transformer Ca, the current transformer Cb and the current transformer Cc, and distinguishes the power consumption state and the power generation state;

[0052] Trains r...

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Abstract

The invention provides a three-phase traction network distributed power supply system and a control method, and relates to the technical field of electrified railway traction power supply. The main busbar of the main substation is connected to the three-phase traction cable through the feeder, the primary side of the traction substation is connected to the three-phase traction cable, and the secondary side is connected to the three-phase traction network. The substation is connected to the traction substation in a distributed manner, and the central coordination controller set in the main substation controls the operation mode of the power generation device, and controls the power generation and reactive power distribution; the use of a distributed power supply system is conducive to supporting the system network voltage and extending the The power supply distance is also conducive to the distributed access and nearby consumption of new energy, promotes the green development of the railway system, and can avoid related power quality problems. It is mainly used for the management of the distributed power supply system connected to the three-phase traction network.

Description

technical field [0001] The invention relates to the technical field of AC electrified railway power supply. Background technique [0002] There have been a large number of successful application cases of new energy and renewable energy power generation in the power system, and the railway system has also been explored. Promote and apply new energy and renewable energy power generation along the railway line according to the principles of adapting measures to local conditions and multi-energy complementarity. [0003] As a new generation rail transit traction power supply solution, three-phase traction power supply has a strong power supply capacity, which is 7 times that of overhead lines of the same voltage level. Compared with the traditional DC traction power supply system, it is possible to avoid stray current and its hazards, and can directly use the regenerative braking energy to the maximum extent; compared with the traditional AC traction power supply system, it can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/48H02J3/50H02J3/18H02J3/16H02J3/28H02J3/32H02J13/00
CPCH02J3/381H02J3/466H02J3/48H02J3/50H02J3/1821H02J3/16H02J3/28H02J3/32H02J13/00017H02J2300/20H02J2300/22H02J2300/28H02J2300/40Y02E70/30Y02E40/30
Inventor 李子晗黄小红李群湛郭锴吴波
Owner SOUTHWEST JIAOTONG UNIV
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