Data filling method for intelligent electric meter based on variational auto-encoder

A smart meter and self-encoder technology, which is applied in the direction of instruments, character and pattern recognition, computer components, etc., to achieve the effect of filling accurate data

Pending Publication Date: 2020-12-11
STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD HARBIN POWER SUPPLY CO +2
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  • Application Information

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Problems solved by technology

[0003] At present, there are few studies on filling the missing data of smart meters. Therefore, it is n

Method used

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  • Data filling method for intelligent electric meter based on variational auto-encoder
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  • Data filling method for intelligent electric meter based on variational auto-encoder

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Embodiment

[0116] Extract the load data of a power grid in Northeast China, and use the above method to cluster and generate scenarios. After clustering, the cluster centers of various internal loads are as follows: figure 2 As shown, four clusters are obtained. After clustering, various intraday load scenarios are as follows: image 3 As shown, seven original data curves were selected from each cluster, and different missing data time periods were set for them, that is, a total of 96 data points were obtained every day, one every 15 minutes, and the seven curves were respectively Set different missing time periods from 0:00 to 1:00, 3:00 to 4:00, 6:00 to 7:00, etc. Table 1 shows the filling effect of one of the two curves, and the missing time of curve one The segment is from 0:00 to 1:00, and the missing time segment of curve 2 is from 3:00 to 4:00;

[0117] Table 1

[0118]

[0119] The error in comparing the imputed data with the corresponding original data is measured as the m...

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Abstract

The invention discloses a data filling method for an intelligent electric meter based on a variation auto-encoder, and the method is specifically implemented according to the following steps: taking ahistorical daily load data set obtained in an intelligent electric meter as a clustering sample for clustering analysis, and obtaining type days with different power utilization characteristics, namely, clustering results; taking historical load data in dates contained in the clustering result as input, and generating a VAE-based massive daily load curve; establishing a mathematical model of discrete curve similarity, selecting a group with the highest daily similarity with the missing data by comparing with each clustering center, and finding out ten curves similar to the daily load curve ofthe missing data in shape from the group with the highest similarity to serve as historical daily load curves; and processing data corresponding to the similar historical daily load curve through animproved weighted average method to obtain a corresponding missing data prediction value, thereby realizing missing day intelligent electric meter load data filling. Missing data can be accurately filled through historical load data.

Description

technical field [0001] The invention belongs to the technical field of electrical data monitoring, and in particular relates to a method for filling data of an intelligent electric meter based on a variational autoencoder. Background technique [0002] The deployment and application of a large number of smart meters enables power companies to obtain measured data at the end of the distribution network with high frequency, wide coverage and consistent time scale. However, the observed value of the user's electricity load data is affected by various factors, and may be missing during collection and transmission. The lack of these data has a great negative impact on the correct establishment of load models, the mining of the intrinsic correlation and deep value of smart meter data, and the provision of decision support for power companies' commercial operations, grid planning, and operation and maintenance. Therefore, before analyzing the smart meter data, it is necessary to e...

Claims

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/23G06F18/10
Inventor 唐晓博王东郭玉崔春徐新亮于喆张鑫鹏李字霞刘晶淳
Owner STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD HARBIN POWER SUPPLY CO
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