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Rail transit alternating-current online ice melting system and method

A rail transit and ice-melting technology, applied in the installation of power lines, electrical components, cables, etc., can solve complex switching operations, train outages, affecting people's travel, etc., to achieve a simple ice-melting path and prevent catenary Effects of icing, avoidance of complex switching operations and risks

Pending Publication Date: 2021-01-22
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing ice-melting schemes all need to be carried out under the condition of catenary power failure, which requires complex switching operations, and the catenary power failure will cause trains to stop running, affecting people's travel and causing traffic congestion

Method used

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  • Rail transit alternating-current online ice melting system and method
  • Rail transit alternating-current online ice melting system and method

Examples

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Embodiment 1

[0065]The present invention provides a rail transit AC on-line ice melting system and method, which can realize the anti-icing and melting of the rail transit contact network without affecting the power supply of the rail transit contact network. Compared with the traditional ice melting method, there is no need for catenary power outage and switch operation, and it does not affect the operation of the train. This method uses the skin effect of the high frequency AC power supply to increase the line impedance and reduce the ice melting current value.

[0066]The present invention proposes a rail transit multifunctional AC online ice melting system. A dedicated AC online ice melting device is installed in a specific place. The AC online ice melting device forms an ice melting path together with the upstream and downstream catenary of the line that needs to melt ice. , Realize the exchange of online ice melting.

[0067]The AC on-line ice melting device is essentially a dedicated high-frequ...

Embodiment 2

[0073]figure 1 It is a structural diagram of a rail transit exchange online ice melting system provided by an embodiment of the present invention, such asfigure 1 As shown, the AC online ice melting device (1) is installed at a station in the middle of the ice melting line, and this station includes a step-down substation (8), and the first and last station of the ice melting line should be the traction substation (7). This is to avoid the short-circuit of the ice melting device due to the formation of a passage between the upper and lower catenaries in the intermediate stations.

[0074]The AC on-line AC ice melting device (1) provides high frequency AC current, which is loaded into the ice melting path to generate skin effect and realize electric ice melting. One end of the output of the AC on-line AC ice melting device (1) is connected to the midpoint of the upstream catenary (2) of the ice melting line, and the other end is connected to the midpoint of the downstream catenary (3) o...

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Abstract

The invention provides a rail transit alternating-current online ice melting system and method. The system comprises an alternating-current online ice melting device, which is installed in a middle station of a line needing ice melting, wherein the middle station comprises a voltage reduction substation, the head station and the tail station of the line needing ice melting are traction substations, alternating-current input of the alternating-current online ice melting device is connected with a three-phase alternating-current power grid, one output end of the alternating-current online ice melting device is connected to the midpoint of the uplink contact network of the line needing ice melting, the other end of the alternating-current online ice melting device is connected to the midpointof the downlink contact network of the line needing ice melting, the alternating-current online ice melting device and the uplink and downlink contact networks of the line needing ice melting form anice melting passage together, and when ice melting is needed, the voltage provided by the alternating-current online ice melting device is an ice melting voltage and forms a passage, and ice meltingcurrent flows through the ice melting passage, so that alternating-current online ice melting is achieved. According to the invention, the ice melting of the contact network is realized under the condition of not influencing the power supply of the contact network, the complex switching operation required by the traditional ice melting method is avoided, and contact network icing is prevented.

Description

Technical field[0001]The invention relates to the technical field of rail transit safety control, in particular to a rail transit exchange online ice melting system and method.Background technique[0002]Urban rail transit is an important infrastructure related to the national economy and people’s livelihood. Lines built on the ground and in the car depot are prone to contact net icing under low temperature, freezing rain, wet snow, freezing and other climatic conditions. When the catenary is iced, there will be an arc between the contact wire and the pantograph, which will cause the train to fail to take the flow normally, the network pressure is unstable, and even cause major accidents such as disconnection and bowing, which affects train operations and may cause Serious economic loss and social impact.[0003]At present, the most commonly adopted measure to deal with catenary icing in the prior art is thermal ice melting. The so-called thermal ice melting is to apply a melting curren...

Claims

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Application Information

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IPC IPC(8): H02G7/16B60M3/00
CPCH02G7/16B60M3/00
Inventor 张钢刘志刚龙赤宇陈杰邱瑞昌牟富强漆良波赵春柳王运达李进吕海臣魏路路亮孙星亮
Owner BEIJING JIAOTONG UNIV
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