IEEE PVSC 49
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SPLTRAK Abstract Submission
Decentralized BESS Control on a Real Low Voltage System with a Large Number of Prosumers
Bruno Cortes1, Ricardo Torquato1, Tiago Ricciardi1, Fernanda C. L. Trindade1, Walmir Freitas1, Victor Riboldi2, Kunlin Wu2
1University of Campinas, Campinas, Brazil
/2CPFL Energia, Campinas, Brazil

Battery Energy Storage Systems (BESS) are becoming increasingly common in modern low-voltage (LV) systems. A pilot project in a real Brazilian LV system, for instance, has a medium-size, 100 kW/225 kWh BESS at the LV side of the service transformer, and 27 customers with photovoltaic (PV) generation. This paper investigates the operation of this system if the PV owners also install small 5 kW/12.5 kWh BESS in their residences. Different control modes for the medium and small BESS are analyzed through quasi-static time series simulations. Results indicate that, if the control parameters of these multiple BESS are determined independently, with no coordination among them, there may have significant adverse effects on the operating indices of the grid. The paper then proposes a simplified strategy based on historical measurement data to determine the operating parameters of the medium-size BESS, so that the adverse impacts on the grid can be mitigated even without knowledge of the detailed operation of the small-size BESS. Details of the proposed method will be provided in the full version of this work.