DYNAMIC FUZZY CLUSTERING METHOD FOR DECISION SUPPORT IN ELECTRICITY MARKETS NEGOTIATION

General information

Authors:
Ricardo FAIA, Tiago PINTO, Zita VALE

DOI:
10.14201/ADCAIJ2016512336

Volume:
Regular Issue 5 (1), 2016

Keywords:

Artificial Intelligence; Clustering; Electricity Markets; Fuzzy Logic

Artificial Intelligence (AI) methods contribute to the construction of systems where there is a need to automate the tasks. They are typically used for problems that have a large response time, or when a mathematical method cannot be used to solve the problem. However, the application of AI brings an added complexity to the development of such applications. AI has been frequently applied in the power systems field, namely in Electricity Markets (EM). In this area, AI applications are essentially used to forecast / estimate the prices of electricity or to search for the best opportunity to sell the product. This paper proposes a clustering methodology that is combined with fuzzy logic in order to perform the estimation of EM prices. The proposed method is based on the application of a clustering methodology that groups historic energy contracts according to their prices’ similarity. The optimal number of groups is automatically calculated taking into account the preference for the balance between the estimation error and the number of groups. The centroids of each cluster are used to define a dynamic fuzzy variable that approximates the tendency of contracts’ history. The resulting fuzzy variable allows estimating expected prices for contracts instantaneously and approximating missing values in the historic contracts.

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