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    COMPARATIVE EVALUATION OF STAND-ALONE HYBRID POWER SYSTEM WITH DIFFERENT ENERGY STORAGES
    (Parlar Scientific Publications (P S P), 2021) Ozturk, Zafer; Tosun, Salih; Ozturk, Ali; Akar, Onur
    Nowadays, increasingly technological improvements and population augmentation lead to searching for new energy resources. The limited energy resources against growing energy demand lead increase in the trend towards Renewable Energy Resources (RES) such as solar and wind. The lack of continuity in energy generation of RES due to weather conditions causes fluctuations in the power network. The energy surplus from RES can be charged, and then the stored energy can be discharged if needed to prevent the fluctuation. The utilization of storage increases energy costs. However, it is possible to reduce this cost thanks to proper energy management. Thus, it is of great importance to determine the most appropriate storage management according to generation and loading profile. In this study, management of a hybrid power system (HPS) is proposed for the facility location in Balikesir, Turkey. The proposed HPS includes modeling of solar panels (PV), wind turbine (WT), diesel generators (DC), and six different battery types. The technical and economic performances of HPS configurations containing six different battery types are optimized. Besides, the sensitivity of the results is analyzed. A new approach for optimal battery selection is presented to increase the efficiency of HPS.
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    Technical-environmental-economic evaluation of biomass-based hybrid power system with energy storage for rural electrification
    (Pergamon-Elsevier Science Ltd, 2022) Demirci, Alpaslan; Akar, Onur; Öztürk, Ali
    In recent years, higher penetrations of renewable energy generations helped persuade sustainable energy and environmental targets, although their intermittent and fluctuated nature raised technical challenges. However, hybrid power system can minimize these technical issues by integrating flexible generation capable renewable energy sources like biomass. This study deals with optimizing gridintegrated and stand-alone biomass-based hybrid power system for the energy demand of a rural region containing poultry farms. Besides solar and wind energy, energy storage integration is evaluated regarding overall technical-environmental-economic performance, considering the actual manure potential using HOMER Pro. In addition, sensitivity analyses are performed, considering the estimated load and inflations using an artificial neural network method. Using biomass and solar hybrid options offers more autonomous, environmentally friendly, and economic advantages. Biomass-based hybrid power system with solar energy reduced net present cost by around 12% and increased renewable fraction by 7%, and grid-connected options can provide 88.9% renewable fraction. In addition, the energy storage integration increased renewable fraction by around 10% and reduced excess energy by 16%. The proposed biomass-based hybrid power system achieves cost-effective sizing of solar or wind-based hybrid systems, empowers the reliability of renewable energy and presents good consistency of decarbonization targets.