Provides information on the design of power grids, methods of technical and economic calculations, selection of parameters and network diagrams, data on electrical equipment, overhead and cable lines, and the cost of elements of electrical grids. This publication takes into account the latest changes in the structure of the Russian energy sector and the requirements of new regulatory documents; new technical data on cable lines, autotransformers, switching devices and other types of equipment, as well as updated cost indicators of network facilities; modern approaches to the formation of electricity tariffs are considered.