The green energy transition and the energy crisis bring new challenges for the energy system of the European Union, which emphasize the need to reduce import dependence and complete decarbonization of the energy system. Achieving goals brings many challenges. It is necessary to preserve the economy and preserve and improve the availability of energy. The accelerated transition includes an increasing number of renewable energy plants connected to the energy system. Due to its stochastic nature, the power system is not adapted to work with the full potential of renewable energy sources. In order for the system to be sustainable in the long term, it is necessary to make adjustments that will enable the smooth operation of renewable energy sources, guarantee a reliable supply, and at the same time, reduce adjustment costs as much as possible. This graduate thesis provides an overview of the current state of supply from renewable energy sources, an overview of possible solutions for adjusting the energy system and an example of adjusting the supply in one industrial zone. The adaptation of the industrial zone is based on flexible energy supply made possible by: the zone's participation in the electricity exchange, the use of a battery system and flexible management of the biogas plant. Flexible energy supply is shown by a mathematical model created in the Matlab program. The aim of the model is to show the way of management that achieves the minimum costs of electricity supply. To create the supply model, industrial consumption profiles of the zone were used based on available data on similar plants, and a photovoltaic system model of the industrial zone was created in the PVSol program.