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Abstract:
Aiming at the problem that single typical curve cannot satisfy the demand of load uncertainty analysis, a typical interval scene mining method for consumer load based on haar wavelet coding and improved K-medoids algorithm aggregation is proposed. The low dimensional load approximate sequences are obtained by haar wavelet transform of the original load curve. The feature set of load approximate sequence in each dimension is clustered separately, the boundary values of the features contained in the clusters are extracted, and numerical intervals are obtained and coded. The non-significant numerical intervals are eliminated according to the feature proportion, and the significant numerical intervals with different dimensions are combined to obtain the load interval sequences represented by strings. The string difference is defined to measure the similarity of load interval sequences, the improved K-medoids algorithm aggregation is used to obtain the clusters of load interval sequences, and the boundary values of load approximate sequences in the clusters are extracted to obtain the typical interval scenes. The difference threshold is set to realize granularity adjustment of typical interval scenes. The measured load data of a user in Ireland is used for verification, and the experimental results show that the proposed method can realize mining of typical load interval scenes with different granularities. © 2022, Electric Power Automation Equipment Press. All right reserved.
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Electric Power Automation Equipment
ISSN: 1006-6047
CN: 32-1318/TM
Year: 2022
Issue: 6
Volume: 42
Page: 154-160
Cited Count:
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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