A distributed power transformer noise detection system and its noise detection method

Abstract

The invention discloses a noise detection system for a distributed power transformer and a noise detection method for a distributed power transformer. The noise detection system comprises a detection center unit and a plurality of detection terminals, wherein each detection terminal includes a noise sensing module, a signal acquisition and A / D conversion module, a digital signal processing module, a signal remote transmission module, a clock module and a power supply module. The noise detection method comprises the steps: preinstall the detection terminals; sending a request to the detection terminals by the detection center unit; acquiring noise signals after the detection terminals receive the request, and performing background noise filtering, 1 / 3 octave frequency spectrum calculation, sound pressure level calculation and detection result coding successively; and finally sending the detection result after coding to the detection center unit, and storing the received detection result in a database by the detection center unit. The noise detection system for a distributed power transformer and the noise detection method for a distributed power transformer can realize distributed detection of the noise of a power transformer in a large area and classification of the detection data, and have no need for staff on the site, and have the advantages of being wide in detection range, being low in cost and being convenient in operation.

Description

technical field [0001] The invention relates to a power transformer noise detection technology, in particular to a distributed power transformer noise detection system and a noise detection method thereof. Background technique [0002] With the continuous increase of the scale of the power grid and the continuous improvement of the voltage level, the problem of noise impact of power equipment has become increasingly prominent. In recent years, the number of complaints related to the noise of power equipment has been increasing, and the noise impact of power equipment has become an urgent problem that must be faced in the process of power grid construction. Transformer is one of the most important noise sources in power equipment, and its noise detection is the prerequisite for the analysis and control of transformer noise characteristics. In addition, power transformer noise is closely related to its operating state, and different noise characteristics correspond to differe...

AI Technical Summary

Problems solved by technology

At present, in order to detect the noise of the transformer, the staff need to carry a large number of equipment to the substation site, such as sound level meter, calibrator, extension rod, cable, tripod, etc., which is inconvenient to carry and needs to be installed on site

For relatively remote substations, it takes a long time for the staff to go to and from the substation, which is likely to cause waste of manpower and material resources

In the case of many substations to be tested, the test period required to complete all transformer noise detection is longer

In addition, after each noise detection is completed, the staff need to sort out and analyze the data separately. There are many data to be sorted out, which is not conducive to improving work efficiency, and it is difficult to carry out a certain time range for a certain transformer in a specific area or a specific substation. Statistical analysis of historical noise data characteristics within

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