CN104316847A - On-line monitoring and positioning system for partial discharge of transformer station - Google Patents

Abstract

The invention discloses an on-line partial discharge monitoring and positioning system of a substation. The front-end sound collection equipment collects the accompanying sound when the partial discharge of the substation is generated, filters the collected sound and transmits it to a background server, and the background server combines the filtered sound signal with the server. Spectrum matching is performed on the sound samples in the whitelist of the server. If they can be matched, ignore the sound collected this time and start to collect the sound of the next period. The samples are matched. If the match is successful, the on-site sound will be recorded and saved, and an alarm will be output at the same time. If no matching sound is found after traversing the blacklist, the on-site sound will also be recorded and saved, and a suspicious alarm will be output at the same time. The invention has reasonable structure and good application effect. It can reduce the workload of daily on-site inspections, detect and locate defects early, and improve the operational reliability of on-site equipment.

Description

Substation Partial Discharge Online Monitoring and Locating System

technical field

The invention relates to a monitoring method for substation partial discharge.

Background technique

With the increasing rate of unattended substations in the power system, intelligent substations will be the main development direction of the power grid in the future. Through all-round automatic monitoring methods, the operation reliability of the power grid will be continuously improved, and the cost of daily operation and maintenance will be reduced. It is a key project that needs to be explored and explored in the future. This research project focuses on the corresponding research in the field of enhanced substation on-line monitoring.

At present, the substations in the system are basically unattended, and the electrical quantity of the actual equipment on site is controlled by means of "three remotes". Another phenomenon: sound, but it is a blind spot in the monitoring of substations today. The abnormal sound of actual equipment is also an important part of the inspection of substations on duty.

Contents of the invention

The object of the present invention is to provide an on-line partial discharge monitoring and positioning system for substations that reduces accidents and improves equipment operation reliability.

Technical solution of the present invention is:

A substation partial discharge online monitoring and positioning system, characterized in that it includes a front-end sound acquisition device installed at the substation monitoring site, the front-end sound acquisition device collects the accompanying sound when the substation partial discharge occurs, and transmits the collected sound to the background after filtering The server, the background server will perform spectrum matching on the server to filter the sound signal and the sound samples in the server white list, if it can match, ignore the sound collected this time and start to collect the sound of the next period, if it matches all the sound samples in the white list No samples match, and then match with the samples in the server blacklist. If the match is successful, the on-site sound will be recorded and saved, and an alarm will be output at the same time. If no matching sound is found after traversing the blacklist, the on-site sound will also be recorded and saved. , At the same time output suspicious alarm.

The invention has reasonable structure and good application effect. It can reduce the workload of daily on-site inspections, find and locate defects early, provide a basis for regular inspections of equipment to condition-based maintenance, and further reduce the occurrence of accidents, especially the probability of developing faults, so as to improve the reliability of on-site equipment. operational reliability.

This system is mainly based on the detection of abnormal sound in substations. Do a good job in the online monitoring of abnormal sounds in the substation site, and accurately locate the location of the abnormality. The transformation of detection into condition-based maintenance provides a basis to further reduce the occurrence of accidents, especially the probability of developing faults, so as to improve the operational reliability of field equipment.

The invention can automatically distinguish the abnormal trend of the switch cabinet and the transformer in real time through the abnormal sound, and realize the positioning.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments.

Fig. 1 is a structural schematic diagram of an embodiment of the present invention.

Fig. 2 is a flow chart of the present invention.

Detailed ways

A substation partial discharge online monitoring and positioning system, including a front-end sound acquisition device 1 installed at the substation monitoring site, the front-end sound acquisition device collects the accompanying sound when the substation partial discharge occurs, and transmits the collected sound to the background server 2 after filtering, The background server will perform spectral matching of the filtered sound signal with the sound samples in the server whitelist (normal sound list). If the match can be found, the sound collected this time will be ignored and the sound of the next period will be collected. If it matches the whitelist All the samples in the file do not match, and then match with the samples in the server blacklist (abnormal sound list). If the match is successful, the on-site sound will be recorded and saved, and an alarm will be output at the same time. If no matching sound is found after traversing the blacklist , also record and save the on-site sound, and output suspicious alarms at the same time.

Claims (1)

1. transformer station's partial discharge monitoring and positioning system, it is characterized in that: comprise the front-end voice acquisition equipment being arranged on supervisory control of substation scene, front-end voice acquisition equipment gathers the sound adjoint when transformer station's shelf depreciation produces, background server is transferred to by after the sound filtering of collection, filtered sound signal and the sample sound in server white list are carried out frequency spectrum and mate by server by background server, if can mate, then ignore this sound gathered and start to gather the sound of subsequent period, if with all samples in white list do not mate, mate with the sample in server blacklist again, if the match is successful, then on-the-spot sound recorded and preserve, output alarm simultaneously, if traversal blacklist does not find the sound of coupling yet, also on-the-spot sound recorded and preserve, export suspicious warning simultaneously.