LOW-VOLTAGE GRIDS IN TRANSITION - AUTO-MATIC GRID RECONFIGURATION APPROACH FOR FUTURE SMART GRIDS CHALLENGES

Current trends, such as the increasing spread of electric vehicle charging stations (EVCSs) with and without battery storage combined with heat pumps (HPs) and air conditioning systems, replacing classical heat supply, are challenging the operation of low-voltage (LV) grids. This can result in noteworthy load flow and short circuit problems in traditional existing power LV grids. A crucial example is the overloading of line segments by loads with significant simultaneity (e.g. EVCSs, HPs, air conditioning systems). Moreover, high local infeed caused by decentralised power generators (e.g. photovoltaic (PV) systems, small hydropower plants, battery energy storage systems (BESSs)) can lead to power quality problems (e.g. voltage limit violations, voltage drop, very short interruption). The project ‘Power System Cognification’ (PoSyCo) defines six Use Cases (UCs) to tackle these challenges. It aims to implement a ‘SOFTprotection’ system, which contributes to fault prevention and serves as an add-on for the conventional ‘HARDprotection’ (fuses, circuit breakers (CBs)). This paper presents an overview of PoSyCo's UCs but is focusing on algorithm for UC4: overload prevention by temporary meshing.