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Estimation of energy loss is an essential task for both operation and planning in electric distribution systems. The energy losses are considered to be uncertain due to measurements. A new method based on fuzzy-c-number clustering and fuzzy multiple linear regression analysis is proposed for developing energy loss formulas to estimate losses in this paper. The proposed method is implemented with three stages. A part of Taipower distribution system in Taipei is used for illustrating the performance of the proposed method.

Energy loss (kWh) estimation of distribution systems is an important task for the system operation and planning. Because the losses are obtained through estimation, providing a fuzzy range of losses to engineers is essential. A new method based on fuzzy-c-number (FCN) and cluster-wise fuzzy regression (CWFR) analysis is proposed for developing loss formulas to estimate losses in this paper. A realistic distribution system is used for illustrating the applicability of the proposed method.