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The substation load is the basic unit for calculating load distribution prediction, and its characteristic is the focus of research in classification and zone division. The growth of substation load depends on the composition change and individual growth of various loads within the substation. The substation load equals the algebraic sum of different types of loads, but requires correction with simultaneous coefficients. Due to data limitations, dividing the substation into smaller areas can be done by selecting boundary values and adjusting area sizes, making each area contain only similar-type loads. Substations with similar loads can be classified and analyzed based on their density and change patterns.