Until the early 1990s, the domestic power industry was a natural monopoly. This was caused by the specificity of the operation of the electricity transmission and distribution sub sectors, technical challenges of coordinating the operation of generating units and transmission networks, requirements regarding long-term forecasting of the industry development, and returns to scale. In view of the above, the objective of the presented paper is to assess the economic situation of energy companies operating in a competitive electricity market. The article analyses the main areas of activity of the energy companies, i.e.: the areas of production, transmission, distribution, and sales. In addition, the market shares of the various energy companies, in terms of generating capacity and the amount of the energy produced, were analyzed. Furthermore, the technical and economic situation of enterprises operating in the power sector was also subjected to analysis. The mentioned analysis has revealed that the profit received from the main activity of the enterprises (i.e. the sale of electricity) has decreased in recent years. What is more, the energy sector must adapt to legal and regulatory changes related to the intensification of the decarbonization policy pursued by the European Commission. Therefore, national energy should focus on developing skills in the areas of innovation, such as: electro mobility, energy storage, energy management, etc.

Energy is a basic industry for any economy and ensures the country’s security, including economic

security. The purpose of the article is to analyze the reform of the energy sector in Ukraine

for successful integration into the energy sector of the European Union. The state of the energy

industry from 2003 to 2018 is analyzed. The following main reasons for the decrease in electricity

generation in Ukraine are identified – a decrease in production volumes, the annexation of Crimea

and the anti-terrorist operation in the east of Ukraine, a decrease in the volume of energy output

from Thermal Power Plants due to aging capacities, difficulties with raw materials, low efficiency,

which, however, has a good effect on the environment due to a decrease carbon dioxide emissions.

The directions of reforming the electric power industry of Ukraine are considered in the context of

“industry-market-company”. Four electricity market models are analyzed and the new model of the

competitor’s market for electricity in Ukraine with contract market, spot market, the balancing market

is substantiated. The structure of the segments of the new electricity market and the participants

are proposed. More than half of the electricity market is provided by nuclear power, which ranks

the 5th in the world in terms of installed capacity. The analysis of the performance indicators of the

nuclear company for 2007–2019 showed significant reserves for the company’s growth, which are

being successfully implemented through strategic development projects and phased corporatization

of the company as a tool of unbundling. The main challenges of implementation a new market

model are analyzed and solutions are proposed.