Pulse small current calibration device

Abstract

The invention relates to a pulse small current calibration device, in particular to an experiment device capable of generating and calibrating milliampere or microampere level pulse small current, and belongs to the field of high voltage and gas discharging. The calibration device comprises a pulse generator, a metal cavity body, an inner conductor A, a current limiting resistor, an inner conductor B, a coaxial current divider and a Rogowski coil. The inner conductor A, the current limiting resistor, the inner conductor B and the coaxial current divider are successively connected to and arranged in the interior of the metal cavity body. The Rogowski coil sleeves the current limiting resistor. The inner conductor A is connected with the pulse generator. Current signals of the coaxial current divider and the Rogowski coil are connected with an oscilloscope through a cable. According to the invention, stable and controllable pulse small current signals can be generated; and the calibration device can be used for calibration and standardization of pulse small current measurement systems in different fields.

Description

technical field [0001] The invention relates to the field of high voltage and gas discharge, in particular to an experimental device capable of generating and calibrating milliampere or microampere pulse small currents. Background technique [0002] Corona discharge is a localized self-sustained discharge that occurs in a non-uniform electric field. Corona discharge usually consists of a series of single discharge pulses with a high repetition rate; corona discharge can generate high-frequency pulse current and is an important source of electromagnetic interference. The corona on the wires of high-voltage transmission lines in the power system will not only cause the power loss of the line, but also generate strong radio interference and audible noise, which will affect the surrounding electromagnetic environment. Corona discharge or partial discharge of other high-voltage devices such as motors, transformers, gas-insulated substations and other electrical equipment will al...

AI Technical Summary

Problems solved by technology

At present, the problems existing in the measurement of corona current or other pulsed small currents are as follows: the current amplitude is small, the discharge stability is poor, it is easy to be disturbed by the outside world, and the repeatability of the current is poor; the discharge pulse is fast, and the high frequency response of the measurement system is required. High; there are many measurement methods, but due to the lack of effective calibration means, the measurement data is relatively poor

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