Optimisation of the Level of Reliability of Field Distribution Networks in the Context of the Need to Provide a Reserve For Their Individual Elements

The paper presents the methodology for optimisation of the power network structure, based on the selection of the number of reserve elements of individual network devices. This method takes into account the minimum acceptable level of network reliability and the economic criterion. Current reliability indices of medium voltage field distribution networks are presented. The required level of reservation of individual network devices is established on the basis of the described method and the determined reliability and economic parameters.