Real-time supply-demand schedule update and operation for generators and battery energy storage system based on forecasted and actual photovoltaic power outputs |
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Authors: | Taisei Yoshioka Koji Nishio Kohei Takahashi Taisuke Masuta Rajitha Udawalpola Hideaki Ohtake |
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Affiliation: | 1. Department of Electrical and Electronic Engineering, Faculty of Science and Technology, Meijo University, Nagoya, Japan;2. Department of Electrical and Information Engineering, Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka;3. Fukushima Renewable Energy Institute (FREA), National Institute of Advanced Industrial Science and Technology (AIST), Koriyama, Japan |
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Abstract: | The photovoltaic (PV) power output might be frequently curtailed to maintain electricity supply-demand balance in future power systems. In our previous study, we proposed a new method for updating the battery energy storage system (BESS) charge/discharge and the generator unit commitment (UC) schedules based on the forecasted and actual PV power outputs. The forecast dataset was updated every 3 h (eight times a day). Although the simulation results showed that the proposed method could reduce the supply-demand imbalances, it was not clear whether the forecasted or actual values made contributions. Therefore, in this study, we propose and evaluate a real-time scheduling and operation method using the forecasted and actual PV power outputs assuming that the forecasted dataset is updated only once a day. Numerical simulations of supply-demand operations are conducted on the power system model of the Kanto area of Japan for one year. The results show that the previous study method has a slight advantage over proposed method in terms of curtailed PV energy and operational cost of thermal generators reduction, but the difference is very small, indicating that the contribution of the actual PV power outputs is greater than that of the forecasted PV power outputs. |
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Keywords: | battery energy storage system (BESS) current-day operation photovoltaic (PV) power generation PV power generation forecast unit commitment (UC) |
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