Abstract
The combined operation of hybrid wind power and a battery energy storage system can be used to convert cheap valley energy to expensive peak energy, thus improving the economic benefits of wind farms. Considering the peak–valley electricity price, an optimization model of the economic benefits of a combined wind–storage system was developed. A charging/discharging strategy of the battery storage system was proposed to maximize the economic benefits of the combined wind–storage system based on the forecast wind power. The maximal economic benefits were obtained based on scenario analysis, taking into account the wind-power forecast error, and costs associated with the loss of battery life, battery operation, and maintenance. Case simulation results highlight the effectiveness of the proposed model. The results show that the hybrid wind–storage system is not only able to convert cheap electricity in the valley period into expensive electricity in the peak period, thus resulting in higher economic benefits, but can also balance the deviation between actual output and plans for the wind power generator to decrease the loss penalty. The analyzed examples show that, following an increase in the deviation of the forecast wind power, the profit of the combined wind–storage system can increase by up to 45% using the charging/discharging strategy, compared with a wind farm that does not utilize energy storage. In addition, the profit of the combined wind–storage system can increase by up to 16% compared with separate systems, following an increase in the deviation penalty deviation coefficient.
Highlights
Introduction with regard to jurisdictional claims inDue to the shortage of traditional fossil energies, and increasing concerns regarding protection of the environment and the safe use of nuclear power sources, renewable energy is receiving increased attention from all aspects of society
China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Abstract: The combined operation of hybrid wind power and a battery energy storage system can be used to convert cheap valley energy to expensive peak energy, improving the economic benefits of wind farms
The battery energy storage system (BESS) has flexible charge/discharge capacity, which can be used to coordinate the wind power output, thereby reducing the loss caused by any deviation from the wind power plan, and increasing the economic benefits of the combined generation system
Summary
Due to the shortage of traditional fossil energies, and increasing concerns regarding protection of the environment and the safe use of nuclear power sources, renewable energy is receiving increased attention from all aspects of society. [2] describes an optimal multi-use operation strategy for a wind farm with a battery energy storage system (BESS). The BESS has flexible charge/discharge capacity, which can be used to coordinate the wind power output, thereby reducing the loss caused by any deviation from the wind power plan, and increasing the economic benefits of the combined generation system. This study developed a systematic optimized model of a wind–storage co-work system and, using a simulation experiment, verified the increase in wind farm profit via the use of storage batteries. The current research was based on the predicted value of wind power, and the deviation in this prediction, for the calculation of the next-day valley electricity price and the working curve of the storage batteries, considering the costs of BESS consumption. The aim was to increase the wind farm profit and lower the deviation between the actual and planned wind power
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