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This article considers national energy security as a component of foreign policy and diplomacy and analyses the current state of Russian energy policy, the role of Russia in global energy geopolitics and the factors affecting it. The author examines energy diplomacy as an instrument of foreign policy at both global and regional levels taking into account the changes in the corporate policy of energy companies

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Although the question of energy security is regarded as an integral part of the contemporary political agenda, there is no single definition that has been agreed among the international community. The term itself has been evolving for more than 40 years of use. This article reviewes and compares existing definitions of the concept at global, regional, and national levels as well as from scientific point of view. It is commonly accepted that security is related to risk. Identifying and measuring energy security risks is a difficult task as the term contains elements whose meaning often depends on the context. Since the energy system cannot be fully protected, it is appropriate to consider energy security as a risk management problem. This article analyses existing energy security assessment literature and proposes a complemented approach for measuring and evaluating national energy security.