Devices for improving voltage conditions in low-voltage electrical distribution networks

The power quality is defined through the standard EN 50160. Consumer areas where the power quality of supplied falls outside the standard EN 50160 pose a problem, causing dissatisfaction among consumers and inefficiencies for distribution companies, leading to losses and system inefficiencies. The most vulnerable areas are primarily those farthest from the corresponding transformer station. Due to voltage drop along the lines, voltage values at the network’s end points may fall below the recommended minimum. In such locations, the network is sensitive to voltage sags. In these cases, rehabilitation of voltage conditions is necessary to bring the power quality parameters within prescribed values. This paper presents new solutions for improving voltage conditions in low-voltage electrical distribution networks and outlines the advantages of these solutions compared to previously used ones.