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A New Clustering Approach for Automatic Oscillographic Records Segmentation

Author

Listed:
  • Vitor Hugo Ferreira

    (Electrical Engineering Department, Universidade Federal Fluminense, Rua Passo da Pátria, 156, Bloco D, Niterói 24210-240, Brazil)

  • André da Costa Pinho

    (Electrical Engineering Department, Universidade Federal Fluminense, Rua Passo da Pátria, 156, Bloco D, Niterói 24210-240, Brazil)

  • Dickson Silva de Souza

    (Centro de Pesquisas de Energia Elétrica, Av. Horácio Macedo, 354-Cidade Universitária, Rio de Janeiro 21941-911, Brazil)

  • Bárbara Siqueira Rodrigues

    (Electrical Engineering Department, Pontifícia Universidade Católica, Rua Marquês de São Vicente, 225, Gávea, Rio de Janeiro 20050-901, Brazil)

Abstract

The analysis of waveforms related to transient events is an important task in power system maintenance. Currently, electric power systems are monitored by several event recorders called phasor measurement units (PMUs) which generate a large amount of data. The number of records is so high that it makes human analysis infeasible. An alternative way of solving this problem is to group events in similar classes so that it is no longer necessary to analyze all the events, but only the most representative of each class. Several automatic clustering algorithms have been proposed in the literature. Most of these algorithms use validation indexes to rank the partitioning quality and, consequently, find the optimal number of clusters. However, this issue remains open, as each index has its own performance highly dependent on the data spatial distribution. The main contribution of this paper is the development of a methodology that optimizes the results of any clustering algorithm, regardless of data spatial distribution. The proposal is to evaluate the internal correlation of each cluster to proceed or not in a new partitioning round. In summary, the traditional validation indexes will continue to be used in the cluster’s partition process, but it is the internal correlation measure of each one that will define the stopping splitting criteria. This approach was tested in a real waveforms database using the K-means algorithm with the Silhouette and also the Davies–Bouldin validation indexes. The results were compared with a specific methodology for that database and were shown to be totally consistent.

Suggested Citation

  • Vitor Hugo Ferreira & André da Costa Pinho & Dickson Silva de Souza & Bárbara Siqueira Rodrigues, 2021. "A New Clustering Approach for Automatic Oscillographic Records Segmentation," Energies, MDPI, vol. 14(20), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6778-:d:658616
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    References listed on IDEAS

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    1. Sang-Keun Moon & Jin-O Kim & Charles Kim, 2019. "Multi-Labeled Recognition of Distribution System Conditions by a Waveform Feature Learning Model," Energies, MDPI, vol. 12(6), pages 1-14, March.
    2. Atanu Sengupta & Sanjoy De, 2020. "Review of Literature," India Studies in Business and Economics, in: Assessing Performance of Banks in India Fifty Years After Nationalization, chapter 0, pages 15-30, Springer.
    3. Meng-Hui Wang & Her-Terng Yau, 2014. "New Power Quality Analysis Method Based on Chaos Synchronization and Extension Neural Network," Energies, MDPI, vol. 7(10), pages 1-18, October.
    4. Miguel Louro & Luís Ferreira, 2021. "Underground MV Network Failures’ Waveform Characteristics—An Investigation," Energies, MDPI, vol. 14(5), pages 1-14, February.
    5. David Källberg & Nikolaj Leonenko & Oleg Seleznjev, 2014. "Statistical estimation of quadratic Rényi entropy for a stationary m -dependent sequence," Journal of Nonparametric Statistics, Taylor & Francis Journals, vol. 26(2), pages 385-411, June.
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