Broadband pulse source circuit and transformer winding deformation detection device

Abstract

The invention provides a broadband pulse source circuit and a transformer winding deformation detection device, the circuit comprises a power supply module, a voltage stabilization filtering unit, a first pulse generation unit, a second pulse generation unit and a broadband pulse source output unit, and the directions of pulses emitted by the first pulse generation unit and the second pulse generation unit are opposite. After being input to the broadband pulse source output unit, the broadband pulses are mutually counteracted to send out broadband pulses, and the broadband pulses are transmitted to the transformer winding for detecting the deformation condition of the transformer winding; the device comprises a broadband pulse generation module, a measurement module, a signal processing module and a calculation output module. The pulse width is reduced to be less than 100ns, the frequency band range is expanded to cover the frequency band range of a response signal generated by deformation of a transformer winding, false detection and missing detection are prevented, and safe and stable operation of a power system is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of transformer fault detection, in particular to a broadband pulse source circuit and a transformer winding deformation detection device. Background technique [0002] When a short-circuit fault occurs in the transformer, a large short-circuit current flows in the transformer winding, and the short-circuit current interacts with the leakage magnetic field to generate a large electromotive force. Although the duration of this transient state is very short, the transformer will still damaged, its windings are likely to be deformed. After the transformer winding is deformed, some damage accidents will occur immediately, but most of them can still continue to operate, but there will be certain hidden dangers. After the transformer is subjected to the impact of short-circuit current, the usual way to check the deformation of the winding and the looseness of the pads is to check the hanging cover. However, due to...

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Problems solved by technology

[0004] The present invention aims to at least solve the problems existing in the prior art that the pulse frequency response method using a pulse source based on an all-solid-state Marx circuit is difficult to reduce the pulse width below 100 ns, the detection frequency range is narrow, and it is difficult to cover the frequency band of the response signal generated by the deformation of the transformer winding. range, prone to false and missed detection, technical problems that affect the safe and stable operation of the power system

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