  This paper proposes a novel algorithm to optimally size and place storage in
low voltage (LV) networks based on a linearized multiperiod optimal power flow
method which we call forward backward sweep optimal power flow (FBS-OPF). We
show that this method has good convergence properties, its solution deviates
slightly from the optimum and makes the storage sizing and placement problem
tractable for longer investment horizons. We demonstrate the usefulness of our
method by assessing the economic viability of distributed and centralized
storage in LV grids with a high photovoltaic penetration (PV). As a main
result, we quantify that for the CIGRE LV test grid distributed storage
configurations are preferable, since they allow for less PV curtailment due to
grid constraints.
