System and method for electrified railway overhead line online ice resistance

A technology for electrified railways and anti-icing systems, applied in the installation of flexible AC power transmission systems, electrical components, cables, etc., can solve problems such as affecting the normal operation of trains, soil environmental pollution, and no application cases, and achieves a simple determination method. Anti-icing function, easy to implement effect

Active Publication Date: 2013-09-25
SOUTHWEST JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a practice of directly throwing deicing agent at airports and expressways in China, but there is no application case of applying deicing agent to contact wires.
In addition, the pollution of the soil and the environment caused by chemical agents is also a problem that needs to be considered.
Catenary hot slippery, manual removal of ice has the advantages of simplicity, but it will affect the normal operation of the train

Method used

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  • System and method for electrified railway overhead line online ice resistance

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is shown that a specific implementation of the present invention is an on-line anti-icing system for an electrified railway catenary, which consists of a static var generator SVG and a voltage transformer at the end of the power supply arm of the electrified railway traction substation SS YH, contact wire temperature sensor TC and control unit CU; the control terminal of the static var generator SVG, the output terminal of the voltage transformer YH and the output terminal of the contact wire temperature sensor TC are connected to the control unit CU; at the same time the remote control device YD It is also connected to the control unit CU.

[0025] The method of using the catenary online anti-icing system for electrified railways of this example to perform catenary online anti-icing is as follows:

[0026] A. When the remote control device YD does not issue an anti-icing command and the temperature value output by the contact wire temperature sensor TC is highe...

Embodiment 2

[0031] This example is the situation where two sets of static var generators are installed in the SS power supply arm of the traction substation when the weather conditions are bad or the power supply arm is long, and the anti-icing current (capacity) of a set of static reactive power generators cannot meet the needs of anti-icing. . That is, the static reactive power generator SVG at the end of the SS power supply arm of the traction substation is limited by the lowest grid voltage at the end of the power supply arm where it is installed, and the anti-icing working current generated is less than the calculated current required for the catenary anti-icing; therefore, To meet the anti-icing requirements, in this example, on the basis of Example 1, a set of mid-section static reactive power generators, mid-section voltage transformers, mid-section contact wire temperature sensors and mid-section control units are added to the middle section of the power supply arm. The control te...

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Abstract

The invention discloses a system and method for electrified railway overhead line online ice resistance. According to the system, a static var generator, a voltage transformer, an overhead line temperature sensor and a control unit are arranged at the tail end of an electrified railway traction substation power supply arm. A control end of the static var generator, an output end of the voltage transformer and an output end of the overhead line temperature sensor are connected with the control unit. Meanwhile, a telecontrol device is connected with the control unit as well. The static var generator in the system is usually used for network voltage compensation and is in an ice resistant work condition when the system is possibly frozen, a network voltage measured by the voltage transformer is compared with an average network voltage, whether a train is on the power supply arm or not and the loading condition of the power supply arm are judged, and therefore the static var generator is controlled to generate capacitive or sensitive ice resistant currents. Online efficient ice resistance can be conducted under the conditions that the operation of overhead lines is not stopped and the train operates normally and the safety of the operation of the train is guaranteed.

Description

Technical field [0001] The invention relates to an online anti-icing system for an electrified railway contact net. Background technique [0002] Catenary is an important part of electrified railway, and the icing of catenary seriously affects driving safety. Ice coating will not only affect static parameters such as the height of the catenary wire, but also affect the dynamic mechanical parameters of the catenary, change its mechanical properties, and degrade the following performance of the pantograph and the catenary (pantograph), frequent offline, and even At the same time, the icing increases the hard point of the catenary, which not only intensifies the arc of the pantograph, but also accelerates the wear of the pantograph skateboard. In severe cases, it even causes the catenary to lose power, affecting the safety and good operation of the train. [0003] The deicing methods currently used in engineering practice include resistive wire heating deicing technology, chemical ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/16H02J3/18
CPCY02E40/10
Inventor 李群湛易东舒泽亮郭蕾解绍锋贺建闽郭锴刘炜李子晗李亚楠陈民武周福林张丽艳
Owner SOUTHWEST JIAOTONG UNIV
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