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High speed railway power supply network system and protection method thereof

A technology for power supply networks and high-speed railways, applied in the direction of overcurrent protection, emergency protection circuit devices, electrical components, etc. Missing selection issues

Active Publication Date: 2017-12-01
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially when there is a high-impedance grounding, there is no significant difference in the impedance angle, which leads to the lack of reliability and selectivity of the traction network protection, which may lead to protection refusal or malfunction, affecting the organization of railway transportation

Method used

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  • High speed railway power supply network system and protection method thereof
  • High speed railway power supply network system and protection method thereof
  • High speed railway power supply network system and protection method thereof

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Embodiment Construction

[0052] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0053] In order to solve the problems existing in the prior art, the embodiment of the present invention provides a high-speed railway power supply network system, including: traction substation, traction substation uplink and downlink feeder circuit breakers 1DL and 2DL, autotransformer AT station, AT substation uplink and downlink feeder circuit breakers 3DL and 4DL, AT partition substation, AT subsection uplink and downlink feede...

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Abstract

The invention discloses a high speed railway power supply network system comprising a traction substation, feed line breakers 1DL and 2DL, an AT station, feed line breakers 3DL and 4DL, an AT subarea station, feed line breakers 5DL and 6DL, an uplink traction network power supply arm and a downlink traction network power supply arm, a first protective relaying device, a second protective relaying device and a third protective relaying device; when detected 1DL and 2DL protection measured values are bigger than a setting value1, or the detected 1DL and 2DL protection measured values are defined between the setting value1 and a setting value2, and a control signal sent by the second or third protective relaying devices is received, the first protective relaying device can control the traction substation feed line breakers to make protection motions, thus breaking the traction substation power supply. The high speed railway power supply network system can solve the problems that a load current and a power supply arm end short circuit current cannot be effectively distinguished; the invention also discloses a high speed railway power supply network system protection method.

Description

technical field [0001] The invention relates to a high-speed railway power supply network system and a protection method thereof. Background technique [0002] At present, the protection principle of electrified railway traction network in my country is mostly based on the difference between load current and short-circuit current. After ensuring the sensitivity, impedance or overcurrent protection is used as traction network protection. When the difference between the load current and the short-circuit current is not large, the comprehensive harmonic suppression of the 2nd, 3rd, and 5th harmonics is used as the criterion of the load current and the short-circuit current to distinguish the load current from the short-circuit current, so as to realize the reliability and protection of the protection action. selective. [0003] However, with the large-scale construction of high-speed railways and a large number of high-speed EMU trains, problems arise: first, the transmission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22H02H3/08
CPCH02H3/08H02H7/22
Inventor 张华志温建民吕文利宁建斌
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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