Importance of renewable energy sources in the national energy system

Abstract

The article attempts to show the differences between the national power system and its subsystems, including the national electrical system. The terms often used interchangeably, i.e. the amount of installed power and the amount of produced power, are characterized. In addition, the specificity of the power system balancing is described. A comparative analysis was made of the installed capacity with the capacity generated in 2015– 2019, also makinga critical assessment, identifying the existing in this period, the phenomena and the importance of energy from RES for the NES.