Abstract
This paper investigates the application of AC multi-period optimal power flow in local energy communities for a high degree of self-sufficiency using a combination of a hydrogen storage system and a battery storage. A residential subnetwork with installed photovoltaic systems and a central storage within the CIGRÉ low voltage network is taken as reference. An electrolyser, a fuel cell and a hydrogen pressure storage are added to the model, which determines the global solution of the multi-period optimal power flow problem. Different households and photovoltaic power supply scenarios are analysed and seasonal influences considered for an optimization horizon of an entire year. Results show that photovoltaic and battery storage size decrease significantly by using a seasonal storage. Paper's second part deals with optimal operation for both cases. It becomes clear that the H2 storage has a positive influence on both: operation of the technologies and operation of the network. Economic benefits of installing a combined energy system is currently not given, but may be the case if technology costs decrease.
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