Ultrasonically local discharging metering system under onsite environment and method

Abstract

The invention discloses an ultrasonically local discharging metering system under an onsite environment. The system comprises a background control platform and a far-end measuring device, wherein the background control platform comprises an upper computer and a first optical emitting receiving module; the upper computer is connected with the first optical emitting receiving module; the far-end measuring device comprises a second optical emitting receiving module, a standard signal generating module, a standard signal modulating module, a broadband power amplifying module, an impedance matcher, an ultrasonic transducer, a standard sound sender, a broadband sound emitting collecting module, a digital encoder and a far-end battery power supply module. The ultrasonically local discharging metering system under the onsite environment provided by the invention can enhance the technical management capacity for the accuracy and reliability of ultrasonic local discharging overhaul measuring data, can efficiently monitor the reliability of the measuring data of an electrifying detector and an online monitoring device in a running process and can monitor the accuracy and reliability of the measuring data of an ultrasonic local discharging online monitoring device.

Description

technical field [0001] The invention relates to the field of measurement, in particular to an ultrasonic partial discharge measurement system in a field environment. Background technique [0002] The on-site environment is very different from the laboratory environment. Interferences such as temperature, humidity, electromagnetic interference and radiation are likely to cause changes in measurement errors. The impact of the on-site environment on electrical devices is as follows: figure 1 .1. At present, in the field of partial discharge detection of power equipment in my country, the method of ultrasonic detection of partial discharge has been popularized and applied on a large scale. In terms of reliability and reliability, there are still many problems such as uneven performance parameters and low degree of standardization, which have largely affected the standardization, standardization, and practical development of ultrasonic partial discharge detection technology. [...

AI Technical Summary

Problems solved by technology

[0004] (1) The accuracy of the measurement data is poor, and the historical data and adjacent data cannot be compared;

[0005] (2) The reliability of the measurement data is poor. Due to the poor stability of the online monitoring equipment, the reliability of the measurement results is poor;

[0006] (3) The reliability of electromagnetic compatibility is poor, and the measurement results and even the basic functions have large deviations after the electromagnetic compatibility test is applied, and some samples cannot work normally;

[0007] (4) On-site conditions and laboratory conditions are very different. Many live detection instruments and online monitoring devices have not passed the strict assessment of "on-site use environment" before they are put into operation. The usability of the equipment is low after being put into operation, and some even seriously affect the Safe operation of primary equipment

However, offline tests are generally carried out after a fault occurs or periodically, lacking long-term effective tracking and supervision; in addition, the conditions of offline tests are also quite different from the conditions of the equipment during operation, which cannot accurately reflect the operating status

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