Fitting method of amplitude-frequency distribution of spatial electric field of airport omnidirectional beacon
A space electric field and omnidirectional beacon technology, which is applied in the direction of measuring electricity, measuring electrical variables, and electromagnetic field characteristics.
Active Publication Date: 2019-10-22
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
In recent years, most of the studies on the high-speed rail electromagnetic interference amplitude-frequency fitting curve directly refer to the results of "Yang'an test": ballasted track is used; 80km / h freight marshalling; the test is only for the pantograph in the common area of the catenary. The space electric field generated by the off-line arc; the data acquisition instrument is not accurate enough; the test data processing adopts 80% no-exceeding rate; the analysis frequency is wide; there is no pertinence
These have not met the electromagnetic compatibility requirements of modern electrified high-speed railways
Chinese Invention Patent Publication No. CN 106324404A provides "A Test System and Analysis Method for Electromagnetic Interference of Electrified Railways to Oil and Gas Pipelines Along the Line", which mentions how to analyze the external electromagnetic interference of electrified railway pantograph-catenary offline arcs, but the test data is still limited to electrified railways The interference current and voltage does not involve space electric field interference
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Embodiment Construction
[0032] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0033] The process of drawing the fitting curve of the invention is as follows: figure 1 As shown, the specific operation steps are as follows:
[0034] A. Background test of space electric field
[0035] When no train passes by, test the electric field value around the airport along the electrified high-speed railway, and record the data;
[0036] B. On-site test of space electric field
[0037] When a train passes by, test the electric field value of the space around the airport along the electrified high-speed railway, and record the data;
[0038] C. Electric phase separation test
[0039] When a train passes by, test the space electric field value of the electrical separation phase of the electrified high-speed railway, and record the data; since the train must draw an arc when passing through the electrical separation ph...
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The invention provides a fitting method of the amplitude-frequency distribution of the spatial electric field of an airport omnidirectional beacon. The amplitude-frequency characteristic curve of thespatial electric field of an arc in the frequency band range of 108-117.975MHz is fitted out by mathematical statistics according to field test data, and the curve can effectively reflect the relationship between the amplitude and frequency of the spatial electric field of the offline arc of the modern electrified railway pantograph-catenary. Then, the fitted curve of amplitude and frequency of the spatial electric field in the frequency band of the airport omnidirectional beacon is drawn. According to the fitted curve, the interference between the amplitude and frequency of the spatial electric field caused by the offline arc of the electrified railway pantograph-catenary can be solved.
Description
Technical field: [0001] The invention relates to the technical field of electromagnetic field testing and analysis. Background technique: [0002] Since the pantograph-catenary offline arc of modern electrified railway high-speed trains emits different electric fields at different frequencies, solving the problem of the relationship between the amplitude and frequency of the pantograph-catenary offline arc space electric field emission can predict the pantograph-catenary offline arc space at different frequencies The amount of electric field emission has an important impact on the analysis of its omnidirectional beacon at the airport. The electromagnetic interference test of my country's electrified railway was carried out at Chenggu Airport on Yang'an Line in 1979, hereinafter referred to as "Yang'an Test". In recent years, most of the studies on the high-speed rail electromagnetic interference amplitude-frequency fitting curve directly refer to the results of "Yang'an tes...
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Login to View More IPC IPC(8): G01R31/00G01R29/08
CPCG01R29/0857G01R31/001
Inventor 朱峰鲁楠周涛陈迎迎
Owner SOUTHWEST JIAOTONG UNIV