Method and device for monitoring geomagnetically induced current of high-speed rails

A technology of geomagnetic induction current and high-speed rail, applied in the direction of measurement using digital measurement technology, to achieve accurate measurement, wide frequency range, and low price

Inactive Publication Date: 2015-07-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Since the monitoring of the high-iron magnetic storm effect has not yet been carried out at home and abroad, the project hopes to learn from the research results of the power grid GIC to study and analyze the monitoring methods and technologies for the high-iron magnetic storm effect

Method used

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  • Method and device for monitoring geomagnetically induced current of high-speed rails
  • Method and device for monitoring geomagnetically induced current of high-speed rails

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Embodiment Construction

[0027] The invention provides a high-speed rail geomagnetic induction current monitoring method and device, which uses a high-speed rail geomagnetic storm infringement monitoring and recording device to monitor the high-speed rail geomagnetic induction current. Be described below in conjunction with accompanying drawing.

[0028] figure 1 It is the circulation path diagram of GIC traction power supply system in AT mode. In the figure, the high-speed rail geomagnetic storm violation monitoring and recording device includes the traction main transformer connected to the three-phase power supply in the traction substation, and the grounding box equipped with traction return current collection; The midpoint lead wire of the choke transformer, the PW protection wire and the traction return wire through the ground wire are connected to the ground pole of the traction transformer for the return flow of a small number of traction currents that return through the positive feeder line;...

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Abstract

The invention belongs to the technical field of monitoring of high-speed rail electrical systems and discloses a method and a device for monitoring geomagnetically induced current of high-speed rails. A high-speed rail geomagnetic storm damage monitoring and recording device comprises a traction main transformer and an earth box with a traction backflow collection function, a three-phase power source is connected into a traction substation, a traction backflow wire running through an earth wire, a PW protection wire and a choke transformer midpoint lead connected with two rail bars are arranged in the earth box which is an independent box structure , and the earth box is connected with an earth electrode of the traction transformer. Since interference exists in GIC (geomagnetically induced current) sampling signals, local high-frequency noise interference can be effectively eliminated by adopting a wavelet analysis method for variable-size localization analysis of time domain and frequency domain windows. The device comprises a signal acquisition sensor, a synchronous signal acquisition card and an industrial control computer. The device with a threshold alarming function is capable of sending alarm signals when monitoring quantity exceeds a threshold, so that influences of geomagnetic storm on a railway system can be known timely and conveniently. By monitoring for a period of time, direct-current magnetic bias current of the traction transformer is recorded to provide data for analysis on safety operation of a high-speed rail tractive power supply system.

Description

technical field [0001] The invention belongs to the technical field of monitoring high-speed rail electrical systems, and in particular relates to a monitoring method and device for high-speed rail geomagnetic induction current. Background technique [0002] Accompanied by the occurrence of strong space weather storms, the space current system in the magnetosphere-ionosphere produces strong disturbances to the Earth's magnetic field. At this time, a global strong change in the geomagnetic field can be observed on the ground, which is called a "magnetic storm". According to the law of electromagnetic induction, it can be known that the time-varying magnetic field will induce an electric field in the earth and form a ground current due to the conductance of the earth. A geomagnetically induced current (GIC for short) will be generated in it. In the past, because most of my country's land is located in the middle and low latitudes, and the railway operation mileage is short, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
Inventor 明晓航宗伟周游马云风
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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