The article describes the advantages and the procedure for applying the theory of real options analysis to the evaluation of investment projects. Also describes the disadvantages of traditional methods and attempt to apply the method of real options to the evaluation investments of energy projects. This method is based on the theory of financial options and allows decrease the uncertainty of the future course of events. Our results have demonstrated a new type of real options. This method has been successfully used in assessing the economic efficiency of the third unit Kharanorskaya Power Plant. The research identified a new type of embedded options and calculated parameters. Also, we conclude that the application of the theory of real options analysis in relation to investment projects in energy allows, first, to reduce the uncertainty of the source of information and, consequently, the amount of risk, and second, to evaluate the cost effectiveness of the project in view of the possible solutions in the future, and third, increase the investment attractiveness of the industry. Different companies, investment banks, and other stakeholders can apply the research results as a methodological apparatus evaluating the investment and the possibility to participate in their financing.

The purpose of research is a comparative analysis of economic mechanisms for the realization of investment projects for new construction and modernization power generation capacity in the energy sector and their effect on private investment. In this connection, planned and actual volumes of generating capacity, particular features of the industry, causing investment attractiveness are discussed. The necessity of using, and a comparison of primary economic mechanisms in order to guarantee the return of investments in the new construction and modernization of power generation capacity is shown. The method of calculating the tariff under the agreement of supply power capacity is analyzed. The study proved that the presence of an effective working mechanism of return on investment is a key element influencing the investment in new construction and modernization of power generation capacity. Also, it is shown that with the end of using agreement of supply power capacity, industry will face a significant reduction in investment. In this connection, it is recommended to speed up the formation of long-term capacity market, which involves the application of new investment incentives in the industry. The research results can be applied by investment banks, and other stakeholders as a methodological apparatus assessing investment and whether to participate in their financing.