Electrified railway electromagnetic environment monitoring system

Abstract

The invention discloses an electrified railway electromagnetic environment monitoring system which comprises signal receiving and acquiring equipment used for performing signal acquisition and outputting five paths of acquired signals, a power synthesizer used for carrying out power synthesis and impedance matching processing on the first and second paths of acquired signals, a real-time frequencyspectrograph used for carrying out FFT operation processing on the power synthesis signal, a receiver used for carrying out detection processing on a third path of acquired signals, a power divider used for averagely distributing the fourth path of acquired signals to the frequency spectrograph and an oscilloscope for acquiring and processing respectively, the oscilloscope used for acquiring andprocessing the intensity of the fourth path of acquired signals according to a frequency sequence, the frequency spectrograph used for acquiring and processing the intensity of the fourth path of acquired signals according to a time sequence, and a control computer used for recording, storing and displaying the signals. According to the invention, electromagnetic environment data inside and outside a train can be accurately obtained in the normal running process of the train, and guarantee is provided for normal running of electrified railways.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility testing, in particular to an electromagnetic environment monitoring system for electrified railways. Background technique [0002] At present, my country's electrified railway adopts the power frequency single-phase AC 25kV power supply system. The power required by the train in the electrified railway is provided by the traction power supply system. The catenary in this system is a typical asymmetric high-voltage transmission line, which will generate an unbalanced electromagnetic field. Interference with train electronic equipment, especially the unbalanced traction current between the two tracks, pantograph-catenary off-line, excessive phase separation, lightning strikes, etc., will generate strong electrical voltage distortion and transient pulses and other electromagnetic interference, which will affect the electrical system; On the one hand, the electrified railway electr...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it cannot accurately obtain the electromagnetic environment inside the train, and cannot reflect the electromagnetic environment of the entire line

[0005] (2) Set monitoring points inside the train and measure according to the industry standard TB / T 3351 of the Ministry of Railways. Although this method can obtain the radiation emission of the low-frequency magnetic field in the train set to people and equipment, it does not take into account the train running speed, sparks, etc. Discharge and many other factors cannot measure the maximum radiation of the system

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