Handheld partial discharge detector of transformer

Abstract

The invention provides a handheld partial discharge detector of a transformer. The handheld partial discharge detector comprises an ultrasonic sensor, a high-frequency current sensor, a data acquisition module, a signal conditioning unit and a data diagnosis and analysis module, wherein the data acquisition module is used for acquiring detection data according to a discharge signal and a high-frequency current pulse signal, wherein the detection data comprise ultrasonic sensor data and high-frequency current sensor data; the signal conditioning unit is used for receiving the detection data transmitted by the data acquisition module and carrying out the pre-process on the detection data to generate data to be analyzed; and the data diagnosis and analysis module is sued for carrying out local discharge detection analysis according to the data to be analyzed. The handheld partial discharge detector of the transformer, disclosed by the invention, can carry out effective detection and analysis on a local discharge signal of the transformer generated to a field transformer and judges whether the interior of the transformer generates local discharge or not through sound and electricity combined analysis, and carries out qualitative estimation on the intensity of the local discharge signal so as to have the advantages of compact structure, handheld type, portability, convenience in detection and the like.

Description

technical field [0001] The invention belongs to the technical field of electric equipment insulation live detection, in particular to a transformer partial discharge detection device, in particular to a hand-held transformer partial discharge detection device. technical background [0002] With the rapid development of my country's power industry construction, the modern power system is developing in the direction of large power grids, large units, ultra-high voltage, and large capacity. In order to ensure the stability and reliability of the power system, more safety requirements for power equipment are also proposed high demands. [0003] In recent years, transformers have been widely used in urban power grids. Once some defects appear in the transformer equipment, equipment failures are very easy to occur. With the increase in the number of transformer substations, the probability of transformer equipment failure is also increasing. In the past, people thought that trans...

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Problems solved by technology

[0005] The partial discharge detection equipment in the prior art, from the perspective of the domestic market, most partial discharge detectors can only extract a small amount of effective signals from the abundant partial discharge signals, and most of the products are fixed, and the volume is large, the structure Complicated and poor in portability, it is not suitable for general testing of a large number of transformers

In the current market, high-end portable partial discharge detectors are monopolized by some foreign manufacturers of traditional partial discharge detectors. The function of the detector is not perfect, so it is necessary to develop a hand-held detector with relatively low cost, which can eliminate various interferences in the detection process, and judge the strength of partial discharge signals, and has good portability.

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