The paper considers various basic feeder schemes of urban distribution networks from the standpoint of economy, reliability, and technical limits. Presented are the mathematical models for the analysis of feeders’ annual costs, reliability performances, voltage drops and cable loading in normal and critical emergency situations. The suggested approach takes into account the uncertainty of various basic data by modeling them as grey inputs, which can have any value within the intervals of values experienced in practice. It was implied that adequate statistical data for the construction of probability distribution functions for uncertain parameters are missing, which is often the case. The proposed mathematical model could serve as a useful tool in planning new or expanding existing distribution networks. As a numerical illustration, the presented calculation methods have been applied for the analysis of the performances of the considered feeder schemes in the Belgrade area.

本文从经济性，可靠性和技术限制的角度考虑了城市配电网的各种基本馈线方案。提出了用于在正常和紧急情况下分析馈线年度成本，可靠性能，压降和电缆负载的数学模型。建议的方法通过将各种基本数据建模为灰色输入来考虑各种基本数据的不确定性，这些输入可以在实践中遇到的值的区间内具有任何值。这暗示了缺少足够的统计数据来构造不确定参数的概率分布函数，这是经常发生的情况。所提出的数学模型可以作为规划新的或扩展的现有分销网络的有用工具。作为数字说明，