Energy efficiency improvement based on the modernization of electrical grid infrastructure as a factor of economic grows in the southern Russian

In the paper the characteristics of the relationship between indexes of economic development and energy efficiency on the evidence from the electricity consumption is described. The results of quantitative analysis of the GDP dynamics and energy intensity in throughout the country and separate regions is described. The characteristics of the urgent problems of the electricity supply network development in Russia is described. The results of the calculation of the SAIDI index by the example of some electric grid companies in the RF are showed. The priority guide lines of strategic development of the electrical grid infrastructure in the southern of Russia are argued.