Protection method for high-speed rail regenerative braking energy feedback system

A regenerative braking and energy feedback technology, applied in electric braking systems, emergency protection devices with automatic disconnection, emergency protection circuit devices, etc., can solve overcurrent and overvoltage, affect the normal operation of traction power supply system, and cannot Fault protection and other issues to achieve the effect of preventing island operation

Active Publication Date: 2020-01-03
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

However, during the operation of the feedback system, faults such as overcurrent and overvoltage may occur, which may lead to failure of the feedback device, or affect the normal operation of the traction power supply system and

Method used

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  • Protection method for high-speed rail regenerative braking energy feedback system
  • Protection method for high-speed rail regenerative braking energy feedback system

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Example Embodiment

[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] figure 1 Shown is a schematic diagram of the electrical topology of the high-speed rail regenerative energy feedback system protection system. The system consists of traction power supply system, multi-winding step-down transformer, multiple four-quadrant converter, three-phase inverter, grid-connected step-up transformer, railway 10kV power supply system, sensors and switch cabinets. The main functions of the system are:

[0028] 1) Feed back the regenerative braking energy generated by regenerative braking of high-speed rail trains to the railway 10kV power supply system;

[0029] 2) Transfer the load from the high-power bridge arm to the low-power bridge arm, realize the load balance of the two power supply arms, and control the negative sequence current;

[0030] 3) Carry out reactive power compensation and harmonic control.

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Abstract

The invention discloses a protection method for a high-speed rail regenerative braking energy feedback system, which comprises the following steps of detecting a real-time signal of a key position ofthe system, judging a fault occurrence position and a type by a control module, and performing tripping, reclosing and inter-tripping protection actions according to the fault type. The protection method for the high-speed rail regenerative braking energy feedback system has the beneficial effects that (1) a detection sensor is arranged at the key position of the high-speed rail regenerative braking energy feedback system, protection of the high-speed rail regenerative braking energy feedback system is completed through detection, judgment and action, and the vacancy of the system protection method is filled up; (2) fault detection and protection inter-tripping logic can be used for timely and accurately processing different types of faults of the regenerative braking energy feedback system of the high-speed rail under different operation conditions, so that the self-protection of the fault feedback equipment of the substation is realized, and the fault of the feedback equipment does not influence the power supply of the substation; and (3) by detecting the running state of the 10kV power supply system of the rail, the island state can be recognized in time, and island running of the grid-connected inverter is prevented.

Description

technical field [0001] The invention relates to the field of traction power supply systems, in particular to a protection method for a high-speed railway regenerative braking energy feedback system. Background technique [0002] The high-speed railway regenerative braking energy feedback system can feed back the regenerative braking energy generated by the high-speed train during the braking process to the railway 10kV power grid, and can detect the 10kV load power and match the feedback power, realizing the recycling of regenerative energy and improving the economic benefits. However, during the operation of the feedback system, faults such as overcurrent and overvoltage may occur, which may lead to the failure of the feedback device, or affect the normal operation of the traction power supply system and the railway 10kV power supply system. [0003] At present, there is no protection system designed for the high-speed railway regenerative braking energy feedback system, w...

Claims

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Application Information

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IPC IPC(8): H02H7/00H02H3/00H02H3/04H02H3/06H02J3/38B60L7/10
CPCB60L7/10H02H3/00H02H3/042H02H3/066H02H7/00H02J3/38Y02T10/72
Inventor 胡海涛黄文龙陈俊宇耿安琪何正友
Owner SOUTHWEST JIAOTONG UNIV
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