Portable very-fast transient high-frequency magnetic field measurement system

Abstract

The invention provides a portable very-fast transient high-frequency magnetic field measurement system for measuring a GIS transformer substation high-frequency transient magnetic field. The measurement system comprises an electromagnetic wave receiving antenna for receiving a very-fast transient high-frequency magnetic field signal released by a GIS switch, a synchronous triggering device with aninput end connected with a tail end of the electromagnetic wave receiving antenna, wherein the synchronous triggering device is used for outputting a trigger signal under the condition that a receiving signal of the electromagnetic wave receiving antenna is located in the preset frequency range; a signal processing circuit with an input end connected with the tail end of the electromagnetic wavereceiving antenna, wherein the signal processing circuit is used for processing the receiving signal of the electromagnetic wave receiving antenna as a digital signal; and a signal processor separately connected with the synchronous triggering device and the signal processing circuit and configured to start according to the trigger signal, thereby processing the digital signal. Since the signal processor is started according to the synchronous trigger signal, the power consumption is reduced, the storage space is saved, and the storage capacity required by the measurement system is saved.

Description

technical field [0001] The invention relates to the technical field of power equipment measurement, in particular to a portable ultra-fast transient high-frequency magnetic field measurement system. Background technique [0002] As GIS (Gas Insulated Switchgear, gas insulated metal-enclosed switchgear) substations are more and more widely used in my country's power grids, the level of intelligence in power grids is getting higher and higher, and the problem of electromagnetic compatibility in substations is becoming more and more prominent. Since the secondary equipment such as the merging unit of the smart substation and the smart terminal are located near the primary equipment of the switchyard, they lose the shielding protection of the relay protection room. Therefore, these low-power electronic devices based on the principle of microcomputers are in the event of switching operations, system short circuits, or lightning strikes in the substation. It is susceptible to elec...

AI Technical Summary

Problems solved by technology

[0003] The magnetic field generated by the switching operation of GIS substation is a kind of ultra-fast transient high-frequency magnetic field that appears along with the electromagnetic transient state of switching operation. It has the characteristics of steep rising edge of magnetic field pulse, rapid amplitude change and high frequency. The main technical index parameters are: The frequency is mainly distributed in the range of 1MHz to 60MHz, and the field strength (peak-peak value) ranges from 80A / m to 110A / m. These characteristics of the ultra-fast transient high-frequency magnetic field make the existing magnetic field measurement technology and devices unable to meet its measurement requirements.

Images