There is a wide range of tools that are used to manage the energy sector, and the number of these tools is constantly growing. These tools include integrated energy planning. A tool of great importance for the energy system operation at the level of increased performance, integrated planning of energy resources can contribute to the acceleration of this sector’s evolution strategy, to changes in the behaviour of operational management, to choosing and imposing an energy system architecture, which could functionally overlap with the national energy system. Through the present research, the authors have set themselves the objective to identify viable solutions regarding the development of the country’s energy sector, using the integrated planning tool of energy resources, as an optimal way to make the energy sector more efficient.