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Anchor section joint type segmental arc inhibiting device of railway overhead line and its method

A suppression device and electric segmentation technology, applied in the direction of power lines, transportation and packaging, vehicle parts, etc., can solve problems such as catenary disconnection, and achieve the effects of improved reliability, high reliability, and long life

Pending Publication Date: 2018-01-26
中国船舶重工集团公司第七一二研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the pantograph slides and the gap between No. 1 feeder and No. 2 feeder widens, due to the influence of the line inductance, the through current cannot change suddenly, and an overvoltage will break down the air gap to generate an arc. When the voltage difference is large, although the electric locomotive will The pantograph leaves the electric section, but the crossing current continues to pass through the arc, and the arc will continue to burn at this time, which will eventually lead to the disconnection of the catenary

Method used

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  • Anchor section joint type segmental arc inhibiting device of railway overhead line and its method
  • Anchor section joint type segmental arc inhibiting device of railway overhead line and its method
  • Anchor section joint type segmental arc inhibiting device of railway overhead line and its method

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Embodiment 1

[0031] Such as figure 2 As shown, the present invention discloses a railway catenary anchor section joint-type electric segment arc suppression device, through specific control, when the train is segmented by electricity, no arc and overvoltage will be generated, which can fundamentally solve the problem. At present, there are problems of overvoltage, electric arc, burning bow and disconnection in the catenary anchor type electric section, including the power electronic solid-state switch connected across the two ends of the electric section and connected in series with power electronic solid-state switches Internet isolation switch at both ends and , also includes two pairs of train position detection sensors J located on the rails on both sides of the electric segment 1 (J 1 ’ ) and J 2 (J 2 ’ ), detect and identify the wheelset signal through the sensor, detect whether the train has reached the detection interval P1-P2 of the electric segment, and the power el...

Embodiment 2

[0035] Such as image 3 As shown, the difference from Embodiment 1 is that the detection interval P1-P2 is identified in a different way. The realization method is to use high-precision voltage transformer PT 1 and high precision voltage transformer PT 2 The voltages at both ends of the jointed electrical segment of the anchor segment are measured respectively, and the voltage difference at both ends of the electrical segment is calculated by the difference measured by the two voltage transformers.

[0036] Due to the line impedance and load dispersion on the power supply partitions at both ends of the electric section in the project, there must be a voltage difference between the two ends of the electric section. As mentioned in the background, when the train pantograph passes through the electric section, there will be a voltage difference In the process of short-circuiting the two power supply partitions of the section, the voltage difference at both ends of the electric ...

Embodiment 3

[0039] Such as Figure 4 As shown, the difference from Embodiment 1 and Embodiment 2 is that the detection interval P1-P2 is identified in a different manner. The implementation is to install optical, microwave or radio frequency detection devices on the pillars beside the track at both ends of the electric section.

[0040] The optical identification device can be infrared or laser, and the basic principle is distance measurement, using the distance difference measured before and after the arrival of the train for identification.

[0041] Microwave and radio frequency identification devices are generally paired. The basic principle is to use radio waves to transmit and receive. When there is no object on the track, the radio wave signal can be received and sent normally. When there is an object on the track, the radio wave signal cannot be received and sent normally. Identification is detected by this method.

[0042] In order to improve the accuracy and reliability of this...

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Abstract

The invention discloses an anchor section joint type segmental arc inhibiting device of a railway overhead line, which comprises electric electronic solid switches spanned at two electric segmental ends and online isolating switches connected to both ends of the electric electronic solid switches in series. The anchor section joint type segmental arc inhibiting device further comprises two train position detecting sensors J1(J1') and J2 (J2') located on rails of two electric segmental ends; the electric electronic solid switches are valve units formed by linking multiple thyristor grades in series; the thyristor grades are linked in parallel in front and back directions; a resistance-capacitance absorbing circuit is linked to every thyristor grade in paralle, and driven by optical fiber isolation. The invention further discloses an arc inhibiting method; for a solid switch is naturally turned off by current zeroing, there is overvoltage, and arc cannot be generated; the network burningand line breaking accidents caused by continuous burning of the arc cannot be happened.

Description

technical field [0001] The invention belongs to the technical field of electrified railway catenary traction power supply, is suitable for the application occasion of electrified railway catenary electric segmental arc suppression, and in particular relates to an electrified railway catenary anchor section joint type electric segmental arc suppression device and its realization method. Background technique [0002] The electrified railway catenary is a special power supply line. In order to ensure the reliability and flexibility of power supply and reduce the scope of maintenance or blackout accidents, it is necessary to carry out electrical segmentation, between the same phases of different electrical partitions powered by the same substation The insulation is called electrical segmentation. There are two types of electrical segments: one is the device-type electrical segment, which achieves electrical insulation through insulators; the other is the anchor segment joint-typ...

Claims

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Application Information

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IPC IPC(8): B60M3/04
Inventor 方华松邱长青陈伟陈方亮杨帆刘金旭高晓峰
Owner 中国船舶重工集团公司第七一二研究所
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