1. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan 250061 China; 2. Electric Vehicle Engineering Laboratory of Shandong Province Shandong University Jinan 250061 China; 3. State Grid Qinghai Electric Power Research Institute Xining 810003 China; 4. Qinghai Province Key Laboratory of Photovoltaic Grid Connected Power Generation Technology Xining 810003 China
Abstract：Due to the spatial scale effect, battery energy storage station (BESS) in adjacent wind farms has advantages in capacity and investment compared with the distributed energy storage systems. Besides, BESS has centralized supervisory control, which bears higher controllability when participating in dispatching and control. Therefore, this paper analyzes the operation pattern and working mode of BESS. It is shown that the current BESS scale can participate in the fluctuation smoothing and peak shaving in power grid. After that, the cost optimization mathematical model is set up based on charging and discharging strategy, to minimize the sum of operating cost. So the optimal BESS capacity can be determined. According to the seasonal differences of wind power outputs, the BESS operating strategy for fluctuation smoothing and peak shaving has been discussed. Taken the maximal benefit of real time operation as the target, the optimal operating model has been built. Thus BESS can adjust the operating mode in accordance with the wind power output differences. The actual wind power data show that this method can optimize the capacity and operating strategy of BESS, and has high feasibility.
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2016, Vol. 31 
