Photovoltaic (PV) systems are among the renewable sources that electrical energy systems are adopting with increasing frequency. The majority of already-installed PV systems are decentralized units that are usually connected to lowvoltage (LV) distribution grids. The PV hosting capacity of an LV grid is usually limited by overvoltage, and the efficient control of distributed electrical energy storage systems (EESSs) can considerably increase this capacity. In this paper, a newcontrol approach based on the voltage sensitivity analysis isproposed to prevent overvoltage and increase the PV hostingcapacity of LV grids by determining dynamic set points for EESSmanagement. The method has the effectiveness of central controlmethods and can effectively decrease the energy storage requiredfor overvoltage prevention, yet it eliminates the need for abroadband and fast communication. The net power injected intothe grid and the amount of reactive power absorbed by PVinverters are estimated using the PV generation forecast and loadconsumption forecast, and the dynamic operating points forenergy storage management are determined for a specific periodof time by solving a linear optimization problem. Simulationsperformed on a realistic LV feeder of the Danish islandBornholm verify the performance of the proposed method.
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