The trend of liberalization and changes in the Estonian energy market, related to the European Union’s strict technological and environmental requirements, implies the need to develop the modelling of new scenarios for the energy sector in Estonia by mitigating the environmental impacts of electricity production and using a new, less environment-damaging technology. The easiest way to develop such scenarios is to use energy planning modelling.
Modeling is one of the complicated methods of forecast. In recent years, a large number of energy planning models have been developed. They vary considerably, and the question arises which model is the best for a certain purpose or situation.
This paper presents part of a study carried out under a PhD thesis at the Department of Thermal Engineering of Tallinn Technical University. The objectives of the study were analysis and evaluation of the energy models existing in the world; development of selection criteria and selection of several energy models for the analysis of energy market in Estonia; practical testing of the applicability of the selected models to Estonia.
The first part of this paper gives an overview of the current energy supply in Estonia and the future changes of the Estonian energy production system related to restrictions in technology and environment. The second part presents the result of testing the LEAP model adaptability for elaborating scenarios of the Estonian energy system development.

Keywords: energy planning model, electricity market, LEAP, reference energy system, liberalization, energy demand, electricity production