An assessment of the sustainability and security of energy systems: an analysis of the energy trilemma index on the example of Russia, Kazakhstan and Armenia

: Ensuring access to sustainable, affordable and clean energy sources is a top priority of the glo - bal energy agenda. It is reflected in the seventh goal of the UN Sustainable Development Agenda with the three dimensions of economic growth, social inclusion and environmental protection. The seventh goal is aimed at providing the sustainable development of energy systems whilst taking into account these dimensions. To assess the development trends of national energy systems within the framework of the global energy agenda, certain methods of quantitative measurement have acquired particular relevance. Approaches to assessing energy security mainly depend on the in - terpretation of the “energy security” concept. The main methods for the integrated assessment of the energy security of states are generally compiled by international organizations. An important indicator for the measurement of the sustainable development