DG-demonet smart LV grid - increasing hosting capacity of LV grids by extended planning and voltage control

This paper describes the impact of different voltage control strategies on low voltage grids with a high share of decentralized generation. These control strategies use the on-load-tap-change capability of new MV/LV-transformers as well as the capability of new PV inverters and other flexible devices to control active and reactive power. The control strategies were operated in field tests in three Austrian LV grids. The demonstrated impact of these control strategies on voltage band usage is faced with an extended planning approach that uses all available measurement data from the grid for a more accurate prediction and optimization of grid voltages.