Renewable energy sources, such as the Sun and wind, have a continuously increasing influence on the power system. With the development of awareness about climate change and the desire to reduce greenhouse gas emissions, there is an increase in the need for renewable sources in the production of electricity. However, electricity produced, for example, from solar panels depends on the insolation of the Sun, energy production in wind farms depends on the strength of the wind, which means that production from renewable sources is not always constant and represents a challenge in stabilizing the power system. On the other hand, solar and wind farms, depending on the installed power, are connected to the existing transmission and distribution network. However, this creates congestion and load on the existing power system network and at the same time requires significant investments in the existing power network infrastructure. The goal is to analyze how the energy system "behaves" after the implementation of a power plant based on renewable sources. Recent research has led to conclusions about the impact of electricity production from renewable sources on the environment and its implementation in the power system from the aspect of peak load monitoring and the generation of excess energy from existing power plants. Namely, renewable sources (sun, wind, etc.) are unpredictable and create problems in planning the production and consumption of electricity.