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Two basic types of low voltage (LV) distribution exist in practice. The systems based on the European approach have long LV feeders whose sizing requires more careful design consideration than systems based on North American practice with shorter LV feeders. The most important criterion in conductor sizing is the correct estimation of the design loads. This paper describes the development and application of a probabilistic design method based on the Beta probability density function (pdf). The paper investigates an approximate approach for estimating load parameters in countries where a large load database is not available. This approach estimates the Beta parameters from the group after-diversity-maximum-demand (ADMD) for the customers. [ABSTRACT FROM AUTHOR]

This paper presents a practical thermal loading guide for distribution transformers feeding residential customers. Extensive load research data were used to estimate the thermal response of a "standard IEC distribution transformer." A strong relation- ship between the parameters of a load modeled by load current as a function of time and the hotspot temperature was found. Using this type of load model, a method was developed for estimating the hotspot temperature of a transformer for customers from different load classes. A method was derived to translate the thermal response of a standard IEC distribution transformer to any practical transformer. [ABSTRACT FROM AUTHOR]

Describes a proposed probabilistic model for residential electric power loads. Use of beta probability distribution function to describe the load uncertainty; Information on the modeling of the load probability uncertainty as a bivariate distribution of load current means and standard deviations; Analysis of distribution systems where residential consumers are connected.