A method and device for evaluating the operating state of a power transformer
A technology of power transformers and operating states, which is applied in the direction of instruments, data processing applications, calculations, etc., and can solve problems such as low accuracy
Active Publication Date: 2022-04-22
北京智盟信通科技有限公司
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Problems solved by technology
In the prior art, the operating state of the power transformer is generally judged directly by the sound or temperature of the power transformer, but due to the influence of normal factors, the accuracy of judging the operating state simply from the operating sound and operating temperature of the power transformer is not high
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[0033] The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0034] Such as figure 1 As shown, the embodiment of the present invention provides a method for evaluating the operating state of a power transformer, including:
[0035] Pre-collect the standard operating sound information of the power transformer under various loads and the standard average temperature information under the average load of various set durations and various ambient temperatures, perform feature extraction on the standard operating sound information, and extract the standard The corresponding relationship between the characteristics of the running sound information and ...
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The invention discloses a method and equipment for evaluating the operating state of a power transformer. The method includes collecting the current operating sound information, current temperature information, voltage information, current information and ambient temperature information of the power transformer; calculating the current load and the average load of the set time based on the voltage information and current information; The fixed-time average load and ambient temperature information are respectively matched with the characteristics of the corresponding standard operating sound information and the standard average temperature information; the feature extraction is performed on the current operating sound information of the power transformer, and the similarity with the characteristics of the standard operating sound information; Calculate the average temperature information according to the current temperature information within the set time period, and calculate the deviation rate between the average temperature information and the standard average temperature information; evaluate the current operating status of the power transformer according to the deviation rate and similarity, and output the status evaluation results. The invention can provide the basis for the maintenance operation of the power transformer.
Description
technical field [0001] The invention relates to the technical field of evaluating the operating state of a power transformer, in particular to a method and equipment for evaluating the operating state of a power transformer. Background technique [0002] Power transformers are widely used equipment in distribution networks, mainly used to change the AC voltage of a certain value into another or several different voltages. When the transformer is in normal operation, there is generally a uniform humming sound, which is the sound caused by the vibration of the iron core caused by the alternating magnetic flux. The operating sound of a power transformer will change with the load and working state, and its operating temperature will not only be affected by the load, but also be affected by the ambient temperature and operating state. When the power transformer has problems such as loose parts, poor contact, insulation degradation and poor heat dissipation caused by aging windin...
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 孙杨陈操艾丽娜王海龙
Owner 北京智盟信通科技有限公司