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Overhead line system wire overheating protection method and system based on actually measured temperature

A technology of overheating protection and catenary, which is applied in the field of rail transit, can solve problems such as inability to apply, inaccurate current-temperature relationship curve, lack of online monitoring and relay protection functions, etc., to achieve good temperature detection and equipment installation Convenience and the effect of reducing the frequency of data transmission

Inactive Publication Date: 2020-08-04
CHENGDU GUOJIA ELECTRICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The mobile temperature monitoring is completed by the catenary inspection car or the monitoring device installed on the top of the locomotive, which does not have the functions of online monitoring and relay protection; the catenary overload protection uses current and environmental conditions to evaluate the temperature rise of the catenary, and the current-temperature relationship curve is extremely inaccurate , so it cannot be applied in the field at all

Method used

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  • Overhead line system wire overheating protection method and system based on actually measured temperature
  • Overhead line system wire overheating protection method and system based on actually measured temperature
  • Overhead line system wire overheating protection method and system based on actually measured temperature

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Embodiment

[0036] Please refer to figure 1 , this embodiment provides an overheating protection system for catenary wires based on actual measured temperatures, which includes temperature measuring equipment, data concentrators and protection devices, wherein the temperature measuring equipment is installed on the catenary pillar or load bearing on the outlet side of the substation cable, used for real-time detection of catenary cable temperature data and contact line temperature data at the outlet side of the substation; data concentrator, which communicates with the temperature measurement equipment; protection device, which communicates with the data concentrator The feeder circuit breaker is electrically connected to the substation automation system.

[0037] In this embodiment, the wire on the outlet side of the substation is where the maximum current of the line is located, which can reflect the maximum temperature of the catenary wire on the power supply arm to the greatest extent...

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Abstract

The invention discloses an overhead line system wire overheating protection method and system based on actually measured temperature, and relates to the technical field of rail transit. The temperature of a carrier cable and the temperature of a contact line on an outlet side of a substation are detected, the real-time temperature of an overhead line system wire at a head end of a power supply armcan be truly reflected, the tripping of a feeder circuit breaker of an overhead line system substation is controlled according to the temperature of the carrier cable and the temperature of the contact line on the outlet side of the substation, and the overheating protection on the overhead line system wire is achieved. Compared with a mobile temperature monitoring mode, the method can realize the real-time temperature on-line monitoring of the overhead line system wire at the head end of the power supply arm; compared with a method for evaluating the temperature rise of the overhead line system wire based on wire current and environmental conditions, the temperature detection is more direct, the accuracy is higher, and the method can be better applied to the overheating protection of theoverhead line system wire.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method and system for overheating protection of catenary conductors based on measured temperatures. Background technique [0002] With the rapid development of high-speed railways, the running speed of trains has been significantly improved. At the same time, with the significant increase in line traffic volume and the backlog of trains dispatched and dispatched, the catenary conductors will be in an overloaded state for a long time. The heat accumulation of long-term large load current will cause the temperature of the catenary wire to be too high, resulting in the deterioration of the current carrying capacity of the wire, the decrease of the mechanical strength, the increase of the latitude, etc., which will reduce the reliability of the catenary system. Disconnection accidents seriously endanger the safe operation of high-speed trains. [0003] At present, there are t...

Claims

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Application Information

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IPC IPC(8): H02H5/04H02H7/22B60M1/02G01J5/00G01K13/00
CPCH02H5/04H02H7/226G01J5/0096G01K13/00B60M1/02
Inventor 林国松冯烜智熊列彬陈德明
Owner CHENGDU GUOJIA ELECTRICAL ENG CO LTD
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