The minute-model is tested under certain added features. As a result, underestimation of levelized costs of energy of about 1.2 €/kWh (> 5%) is observed caused by the activation of MOT and SC. An investigation of optimal operation of the DGS set is of particular importance, as frequently switching on and off and MOTs are competitive strategies. The introduction of MOT leads to more realistic engine operations considering wear implications. However, PS by RES is replaced in this case, as DGs have to run under minimal loading anyway. While only a simple energy management system is implemented, a decrease of diesel consumption is noticeable. Further investigations should improve these results. Introducing the SR has a huge impact on hybrid systems and in particular on the installation of battery capacity. Enormous amounts of storage are added to the system. Since battery systems are able to provide SR and relieve PS by DGs, they highly contribute to stabilizing hybrid systems. An energy management system helps to increase renewable energy shares in combination with the battery. Nevertheless, rigorous definitions of SR restrict enhancement of renewable energy potential. It can be concluded that the minute-model is able to reflect more realistic energy system models than an hourly simulation. Especially short term operation of DG can be taken into account. The inclusion of the operational behavior of DG and stability criteria such as SR leads to high valuable results.
Techno-Economic Optimization of a Hybrid Mini-Grid Using a One-Minute Time Step Approach
2014
6 Seiten, Bilder, Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
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