Overview of the Clustering Algorithms for the Formation of the Bidding Zones

This paper presents an overview of the concepts, features and methods used in model-based approaches for the determination of the bidding zones in multi-regional interconnected networks. The main aspects are discussed on the basis of a set of selected articles taken from the scientific literature. The solution schemes are mainly based on clustering algorithms. The main conclusions are that no prevailing solution emerges, and that further insights are needed, also with the incorporation of specific knowledge taken from the nature of the problem in the solution methods and indicators.