Optimization of distribution network mode by voltage under modern conditions

The article examines a fragment of a real distribution electrical network with a voltage level of 35–110 kV, consisting of a closed-loop 110 kV network with 35 kV branches. Real technical parameters of transformers installed at load nodes and the characteristics of power line conductors were used. The analysis took into account the actual load values, considering the operation of alternative energy sources connected to each node. Under the influence of these factors, some load nodes transform into generator nodes. A calculated equivalent circuit of this network was obtained, considering both longitudinal and transverse parameters. The calculation algorithm used for analyzing the operating modes of the electrical network is described. Numerical calculations of the normal operating modes of the network were performed using a simulation program, enabling the study of the impact of voltage regulation on electrical energy losses. Specifically, the study examined how changes in the voltage level at the base and balancing nodes of the 110 kV network affect the steady-state normal operation of the entire network. The research includes a comparative analysis of energy losses for different components: active and reactive power. This approach allows conclusions to be drawn regarding the influence of voltage regulation measures on energy losses. Based on the performed calculations, the quantitative and qualitative impact of increasing voltage levels at the base node on reducing energy losses across the entire network was determined. Thus, a conclusion was made about the potential for optimizing the operating mode of the electrical network through voltage regulation.