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Power supply automatic switching method, monitoring system and track medium voltage ring network system

A technology of automatic switching and power supply system, which is applied in the field of rail transit and can solve problems such as inappropriate

Active Publication Date: 2022-04-15
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the above method requires the master station to identify the fault area through the current direction, and then the master station needs to trip and isolate the fault area; this control strategy is not suitable for the medium-voltage ring network system of rubber-tyred trams in the rail transit industry

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  • Power supply automatic switching method, monitoring system and track medium voltage ring network system
  • Power supply automatic switching method, monitoring system and track medium voltage ring network system
  • Power supply automatic switching method, monitoring system and track medium voltage ring network system

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Embodiment Construction

[0037] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary, and the embodiments of the present invention will be described in detail below.

[0038] figure 1 It is a schematic diagram of an operation scenario of a rail transit medium-voltage single-ring network to which the embodiment of the present invention is applicable, such as figure 1 As shown in the figure, the rail transit adopts a single ring network power supply mode. L1, L2, and L3 are the external power supply lines of the rail transit, providing the power of the substations of the railway stations. The power of the external power supply lines comes from the substations of the local power grid company. CB1, CB8, CB15 are external power supply incoming circuit breakers, CB2~CB7, CB9~CB14 are ring network circuit breakers. In the normal power supply mode, CB5 and CB11 are in the open position, and the other ci...

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Abstract

The invention discloses a power supply automatic switching method, a monitoring system and a track medium-voltage ring network system. The power supply automatic switching method includes: obtaining power supply detection data of each power supply area in the medium-voltage ring network power supply system; according to the The power supply detection data identifies the fault power supply area and the fault type, and determines the switching control mode adopted according to the fault type, wherein the switching control mode includes the external power supply fault switching mode and the single-ring network internal fault switching mode; according to the switching control mode The power supply of the faulty power supply area is switched. The method can be applied to the rail transit medium-voltage ring network power supply system, and can perform automatic switchover to realize self-restoring power supply.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an automatic switching method for power supply, a monitoring system and a medium-voltage ring network system for rail transit. Background technique [0002] At present, in the power industry, distribution network automation technology is widely used. In the related art, for the isolation and recovery of distribution network faults, the distribution network automation master station system is usually used to isolate and recover feeder faults. The main technology is to use the FTU (Feeder Terminal Unit, Feeder Terminal Unit, Feeder terminal equipment) judges the fault current direction, and sends the result to the main station system of the control center, and then the main station system calculates the fault area, and then separates the switches on both sides of the fault line through remote control. [0003] However, the above method requires the master station to identify ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/28
CPCH02H7/261H02H7/28
Inventor 杨志荣颜学刚何中主崔桃华潘灿辉
Owner BYD CO LTD