Load estimation for microgrid planning based on a self-organizing map methodology

Jacqueline Llanos, Raúl Morales, Alfredo Núñez, Doris Sáez, Matías Lacalle, Luis Gabriel Marín, Roberto Hernández, Fernando Lanas

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)
24 Downloads (Pure)


This study presents a novel load estimation method for isolated communities that do not receive energy or only receive it for a limited time each day. These profiles have been used to determine the installed capacity of generating units for microgrid electrification projects. The social characteristics and lifestyles of isolated communities differ from those in urban areas; therefore, the load profiles of microgrids are sensitive to minor variations in generation and/or consumption. The proposed methodology for obtaining the residential profiles is based on clustering algorithms such as k-means, a self-organizing map (SOM) or others. In this work, SOM clustering is considered because it allows a better interpretation of results that can be contrasted with social aspects. The proposed methodology includes the following components. First, the inputs are processed based on surveys of residents that live in each socio-economic level of housing and the community. Second, family types are clustered using an SOM, from which relevant information is derived that distinguishes one family from another. Third, the load profiles of each cluster are selected from a database. Additionally, social aspects and relevant energy supply information from communities with similar characteristics are used to generate the required database. The SOM for the clustering of families of the community with available energy measurements is used as an initial guess for the clustering of the families in the community with unknown energy measurements. The methodology is applied and tested in the community of El Romeral, Chile, where a microgrid will be installed. The SOM technique compares favorably with a benchmark method that uses the average load profile of a community; furthermore, the SOM clustering algorithm for the methodology is favorably compared with the k-means algorithm because the results obtained by SOM are consistent with the social aspects.

Original languageEnglish
Pages (from-to)323-335
Number of pages13
JournalApplied Soft Computing
Publication statusPublished - 1 Apr 2017


  • Load profile
  • Microgrid
  • Planning
  • Self-organizing map (SOM)

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