Wideband voltage signal acquisition device

Abstract

The invention discloses a wideband voltage signal acquisition device, which is characterized in that a resistance voltage dividing part of the device consists of a non-inductive high-voltage resistor (10) and a non-inductive low-voltage resistor (6)which are connected in series, wherein the non-inductive high-voltage resistor (10) is provided with more than one conductive plate (4) serving as a capacitance regulating part, the resistance value of the non-inductive high-voltage resistor (10) is 10-100 MOmega, the resistance value of the non-inductive low-voltage resistor (6) is 10-100 KOmega, the other end of the non-inductive high-voltage resistor (10) is electrically connected with a disc-like high-voltage connection terminal (1), when the number of the conductive plates (4) is one, the diameter of the plate is 5-20cm, the thickness of the plate is 2-10cm, the distance between the conductive plate (4) and the disc-like high-voltage connection terminal (1) is 2-10cm, when the number of the conductive plates (4) is two to ten, the diameter of the plates is 5-20cm, the thickness of the plates is 2-10cm, and the distance between each two plates is 2-10cm. The wideband voltage signal acquisition device can output 1-100MHZ voltage signal in a distortionless way and can be widely applied in an electric power system for acquiring various voltage signals.

Description

technical field [0001] The invention relates to a signal acquisition device, in particular to a broadband voltage signal acquisition device. Background technique [0002] In the power system, in order to understand the voltage changes in the power grid in real time, people often use voltage transformers, such as electromagnetic voltage transformers that are commonly used in power systems. Although this electromagnetic voltage transformer has the advantages of simple structure, stable and reliable operation, and sensitive response to power frequency voltage, it cannot respond to some high-frequency voltage signals that change rapidly in the system, such as the waveform of lightning strike overvoltage. Make a response, so that people cannot quickly, effectively and accurately collect the high-frequency voltage signals that appear in the system. However, in the power system, due to the objective existence of natural atmospheric overvoltage and man-made operating overvoltage, t...

AI Technical Summary

Problems solved by technology

However, due to the large difference between the voltage division ratio of the resistor divider in the high frequency band and the voltage division ratio of the power frequency band, the collected signal is distorted and cannot truly and objectively reflect the voltage waveform in the power grid The actual changes make the collection work useless

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