A protection method for high-speed railway regenerative braking energy feedback system

A technology of regenerative braking and energy feedback, applied in electric braking systems, emergency protection devices with automatic disconnection, emergency protection circuit devices, etc., can solve overcurrent and overvoltage, affecting the normal operation of traction power supply system, and failure of feedback devices and other problems to achieve the effect of preventing the operation of isolated islands

Active Publication Date: 2021-04-13
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 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, which cannot solve the problem of fault protection of the system

Method used

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  • A protection method for high-speed railway regenerative braking energy feedback system
  • A protection method for high-speed railway regenerative braking energy feedback system

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Embodiment Construction

[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, comprising: detecting real-time signals at key positions of the system; a control module judging the location and type of a fault; and performing tripping, reclosing, and joint tripping protection actions according to the fault type. Beneficial effects of the present invention: (1) Arrange detection sensors at key positions of the high-speed railway regenerative braking energy feedback system, through detection, judgment and action, the protection of the high-speed railway regenerative braking energy feedback system is completed, and the protection of the system is filled. Method vacancy. (2) Fault detection and protection joint jump logic, which can timely and accurately handle different types of faults that occur in the high-speed rail regenerative braking energy feedback system under different operating conditions, and realize the self-protection of fault feedback equipment in substations and the failure of feedback equipment Does not affect the function of the power supply of the substation. (3) By detecting the operation status of the railway 10kV power supply system, the island status can be identified in time to prevent the grid-connected inverter from running in an island.

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 rail 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, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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