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Double-side traction power supply double-tree-shaped external power supply backup power switch structure and control method

An external power supply, traction power supply technology, applied in power lines, emergency power supply arrangements, vehicle components, etc., can solve problems such as reducing power supply reliability, affecting pantograph-catenary status, and generating overvoltage, achieving good versatility, easy implementation, The effect of ensuring the power supply capacity

Active Publication Date: 2022-07-29
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems such as power loss, increased train running time, overvoltage, impact on pantograph-catenary state, and reduced power supply reliability when the train passes through the electric phase separation, which is also not conducive to the absorption of regenerative electric energy by the train

Method used

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  • Double-side traction power supply double-tree-shaped external power supply backup power switch structure and control method
  • Double-side traction power supply double-tree-shaped external power supply backup power switch structure and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1: as figure 1 As shown in the figure, the embodiment of the present invention provides a double-tree external power supply backup structure for bilateral traction power supply, which includes a bilateral power supply traction power supply system composed of two traction substations TS1 and TS2, and is characterized in that: a power grid The substation PS1 provides an external power supply to the two adjacent traction substations TS1 and TS2 respectively, and the grid substation PS2 provides two adjacent traction substations TS2 and TS2 respectively. Each TS1 provides one external power supply; the high-voltage side of the three-phase power transformer PB1 of the grid substation PS1 is connected to the three-phase power grid through the three-phase power line L11 to obtain power, and the low-voltage side is connected to the bus Pbus1; the three-phase power of the grid substation PS2 The high-voltage side of the transformer PB2 is connected to the three-phase pow...

Embodiment 2

[0041] Embodiment 2: When the bilateral power supply traction power supply system is in operation state 1, when the three-phase power line PL22 fails, the external power backup automatic switching device BZT detects that the circuit breaker QF24 is disconnected, and the current IA22, current IB22, and current IC22 are all 0. When the voltage UA22, voltage UB22, and voltage UC22 are all normal, send a command to the measurement and control device D3 to make the circuit breaker QF disconnect. After confirming that the circuit breaker QF is disconnected, the external power backup automatic switching device BZT sends a command to the measurement and control device D2. The circuit breaker QF22 is closed; at this time, the bilateral power supply is disconnected and operated, the grid substation PS1 supplies the external power supply of the traction substation TS2 through the three-phase power line PL21, and the grid substation PS2 supplies the traction substation through the three-pha...

Embodiment 3

[0043] Embodiment 3: When the bilateral power supply traction power supply system is in the running state 2, when the three-phase power line PL12 fails, the external power backup automatic switching device BZT detects that the circuit breaker QF14 is disconnected, and the current IA12, current IB12, and current IC12 are all 0 When the voltage UA11, voltage UB11, and voltage UC11 are all normal, send a command to the measurement and control device D3 to open the circuit breaker QF. After confirming that the circuit breaker QF is disconnected, the external power backup automatic switching device BZT sends a command to the measurement and control device D1 to close the circuit breaker At this time, the bilateral power supply is disconnected and operated, the grid substation PS1 supplies the external power supply of the traction substation TS2 through the three-phase power line PL21, and the grid substation PS1 supplies the traction substation TS1 through the three-phase power line ...

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Abstract

The invention discloses a bilateral traction power supply double-tree-shaped external power supply backup power switch structure and a control method, external power supplies of two traction substations for tree-shaped bilateral power supply are obtained from the same bus of the same substation of a power grid, and when an incoming line of the external power supply of a railway traction substation breaks down and a relay protection device cuts off the incoming line, the external power supply is switched off. The automatic switching of the standby power supply needs to consider the linkage of two traction station incoming lines for forming bilateral power supply, and needs to consider the linkage with a partition station switch according to an external power supply incoming line structure. According to the utility model, the communication technology is utilized, information of two traction substation incoming lines and partition posts in a bilateral power supply system is collected at the same time, intelligent judgment of standby power supply switching is carried out, and the technical problem of standby power supply automatic switching of external power supply incoming lines of bilateral power supply traction substations can be solved. The automatic switching device is widely suitable for automatic switching of the standby power supply of the double-tree-shaped external power supply incoming line of the bilateral power supply electrified railway traction substation.

Description

technical field [0001] The invention relates to the technical field of electric railway traction power supply. Background technique [0002] At present, my country's electrified railways are unilaterally powered, and electrical phase separation must be set between the traction substation and the traction substation. There are problems such as loss of power, increase of train running time, generation of overvoltage, influence of pantograph and catenary status, and reduction of power supply reliability when trains pass through electrical phase separation. Especially in complex and dangerous mountainous areas, large slopes, and heavy-duty railways, the influencing factors of electrical phase separation are increasingly concerned by all parties, and how to reduce (cancel) electrical separation often becomes the focus of attention of all parties. Projects such as the Gala Section of the Qinghai-Tibet Railway and the Sichuan-Tibet Railway, which are being actively promoted in my ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06B60M3/00
CPCH02J9/062B60M3/00Y04S20/20Y02B70/30
Inventor 易东李群湛张丽艳张丽
Owner SOUTHWEST JIAOTONG UNIV
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