Co-located storage systems with renewable energy sources for voltage support in distribution networks

Recently, new standards and incentives are spreading the installation of energy storage systems (ESSs) to promote, inter alia, the renewable energy sources (RES) penetration. ESSs can be used for supporting producers and distribution system operators to give more flexibility to the grid in terms of dispatching capability of RES, load shifting, peak shaving, ancillary services. This paper proposes a local voltage control method based on the capability of ESSs to exchange power with the network in order to maximize, as much as possible, the active power production avoiding the disconnection of generators when voltage limits are violated. The method is applied to a real Italian test MV network and the obtained results are encouraging.