A Three-Dimensional Transient Magnetic Field Measurement System

Abstract

The invention discloses a three-dimensional transient magnetic field measuring system which comprises a three-dimensional magnetic field measuring probe, a three-dimensional signal synthesis unit, anoptical fiber transmission unit and a signal processing unit that are successively connected; the three-dimensional magnetic field measuring probe comprises an insulating counterweight base, an organic glass supporting column and three magnetic field probes; the organic glass supporting column is vertically fixed on the insulating counterweight base, and the three magnetic field probes are respectively a three-dimensional Y-axis vertical direction magnetic field B-dot probe, a three-dimensional Z-axis vertical direction magnetic field B-dot probe and a three-dimensional X-axis vertical direction magnetic field B-dot probe. The three magnetic field probes are fixed on the organic glass supporting column. According to the invention, the transient magnetic field measurement is carried out byadopting three-dimensional hardware synthesis under severe electromagnetic working conditions, and the system can be applied to the fields of electric power, military, aviation, aerospace, and railways needing three-dimensional transient magnetic field measurement.

Description

technical field [0001] The invention belongs to the technical field of high voltage and electromagnetic compatibility, and relates to a three-dimensional transient magnetic field measurement system. Background technique [0002] With the development of smart grid and UHV technology, there are more and more intelligent equipment in the power grid, and the withstand voltage level requirements of high-voltage equipment are getting higher and higher. However, the influence mechanism and protective measures of these equipment's electromagnetic transient process are not very clear. , in the construction of the smart grid, there have been many accidents where the substation cannot be put into operation due to transient electromagnetic disturbance, and the damage to the electronic equipment in operation has caused the protection device to malfunction or refuse to operate; in the construction of the UHV grid, due to the voltage level High, the influence of the transient magnetic fiel...

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Problems solved by technology

[0009] Since the on-site magnetic field signal is emitted by the electromagnetic disturbance source and then emitted into the space, there are reflections, refractions, etc., which will produce a very complex three-dimensional space transient magnetic field condition. The transient magnetic field signal at a certain point in the space may come from all directions. If only one-dimensional The measurement method can only measure the transient magnetic field signal in one direction. This direction may not be the strongest direction in the three-dimensional magnetic field, so it is likely to cause a very large measurement error

[0010] At present, the measurement of the three-dimensional transient magnetic field basically uses three antennas, which are placed in the three-dimensional directions of X, Y, and Z, respectively, and the signals are collected separately, and then synthesized by the background software. Due to the high-frequency transient signal data The volume is very large, and it is difficult to achieve real-time signal acquisition and processing. For example, for the on-site open isolating switch, the opening and closing process is basically above the second level. With a 50M acquisition card, the data volume has reached 1 in 0.66 seconds. G. The amount of on-site test data is very large. How to realize the acquisition and processing of large data volumes of real-time 3D transient magnetic field signals is now a difficult point

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