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Dynamic setting method and system of differential threshold for online monitoring of transformers

A technology of transforming thresholds for transformers, applied in the field of dynamic setting of differential thresholds for online monitoring of transformers, to achieve the effects of improving alarm accuracy, shortening calculation time, and improving data quality

Pending Publication Date: 2019-06-07
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, that is, in order to solve the problem that the existing system only considers the threshold or trend alarm, reduce the number of false alarms, and improve the accuracy of the alarm, the present invention provides a dynamic setting method for the differential threshold of transformer online monitoring , the method includes: classifying and identifying transformer historical data monitored in different operating environments and in different operating seasons

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  • Dynamic setting method and system of differential threshold for online monitoring of transformers
  • Dynamic setting method and system of differential threshold for online monitoring of transformers
  • Dynamic setting method and system of differential threshold for online monitoring of transformers

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Embodiment 2

[0069] An online monitoring differential threshold dynamic setting system 600, the system includes:

[0070] The acquisition unit 601 is used to classify and identify transformer historical data monitored in different operating environments and different operating seasons;

[0071] A preprocessing unit 602, configured to preprocess the historical data identified by the classification, and remove abnormal data in the historical data;

[0072] A generating unit 603, configured to dynamically calculate the discrimination threshold of the transformer by using the historical data from which abnormal data has been removed using a method based on K-means clustering;

[0073] The modeling unit 604 is configured to construct a comprehensive early warning model of the substation equipment based on the threshold alarm and trend analysis of the discrimination threshold based on the Spark distributed parallel computing framework, so as to differentially monitor the discrimination threshold...

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Abstract

The invention discloses a dynamic setting method of a differential threshold for online monitoring of transformers. The method includes the following steps: classifying and identifying the historicaldata of a transformer monitored in different operating environments and seasons; preprocessing the classified and identified historical data, and removing abnormal data from the historical data; usinga method based on K-Means clustering to dynamically calculate the discrimination threshold of the transformer based on the historical data with abnormal data removed; and based on a Spark distributedparallel computing framework, constructing a transformer equipment comprehensive warning model of threshold alarm based on the discrimination threshold and trend analysis, so as to differentially monitor the discrimination threshold of the transformer. The calculation time of the dynamic threshold is greatly shortened while the accuracy of alarm is improved.

Description

technical field [0001] The invention relates to the technical field of operation management of power transmission and transformation equipment, in particular to a method and system for dynamically setting differentiated thresholds for on-line monitoring of transformers. Background technique [0002] As one of the important power transmission and transformation equipment, the reliability of the transformer is directly related to the safe operation of the power system. The online monitoring system based on the analysis of dissolved gas in oil realizes early warning of transformer faults by monitoring the volume fraction of dissolved gas in transformer oil and the gas production rate in real time, that is, when the monitored gas volume fraction and gas production rate exceed the preset When a certain threshold is set, the monitoring system will give corresponding alarm information. Therefore, setting a reasonable threshold can effectively reduce false positives and false negat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/86G06K9/62
Inventor 王峰阎春雨毕建刚袁帅付德慧杨圆常文治是艳杰杜伟何宁辉弓艳朋李斐然吴旭涛邵明鑫许渊
Owner STATE GRID CORP OF CHINA
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