Optimal operation of microgrid considering operation characteristics of battery energy storage
FU Xiaomei1, WEN Buying1, TANG Yuchen2
1. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108; 2. Economic Technology Research Institute, State Grid Fujian Electric Power Co., Ltd, Fuzhou 350012
Abstract：At present, energy storage system has become an important part of microgrid. In this paper, in allusion to the microgrid containing battery energy storage system, an optimized operation model is established, which takes into account the aging of the energy storage battery and the initial value of its state of charge (SOC) and other two operating characteristics. This model aims to minimize the total operating cost of the microgrid. In order to describe the aging degree of energy storage battery, according to the relation curve between the aging degree of energy storage battery and SOC, a method to calculate the aging cost of battery is proposed. In addition, initial SOC of energy storage has a certain influence on its charging and discharging capacity. In this paper, initial SOC is added to the microgrid operation model as an optimization variable. Finally, a micro-network consisting of a micro turbine (MT), photovoltaic power generation and battery energy storage system is taken as an example for analysis. The simulation results demonstrate the effectiveness of the proposed model.
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2021, Vol. 22 
