摘要
针对储能电站无法基于可充放功率、可充放能量进行荷电状态(SOC)区间标定的问题,提出一种基于能量窗的SOC区间标定算法。首先,通过分析储能电站应用场景对电池模型进行简化,重新定义SOC计算方法。通过对充放试验数据进行Wh积分,将开路电压(OCV)曲线的能量积分作为能量窗基准,按一定的算法确定不同能量窗宽度系数的最优充放电区间。最后将基于OCV曲线计算的能量窗区间映射到特定功率下的电压区间,完成SOC标定。基于现场储能电站的SOC标定测试表明,该算法标定的SOC运行区间能够同时确定可充放功率及可充放能量,为调度运行提供准确的参考。
Aiming at the problem that energy storage power station cannot calibrate the state of charge(SOC)interval based on chargeable and dischargeable power and energy,an energy window-based SOC interval calibration algorithm is proposed.Firstly,the battery model is simplified by analyzing the application scenarios of energy storage power stations and the SOC calculation method is redefined.By performing Wh integration on the charging and discharging test data,the energy integral of the open circuit voltage(OCV)curve is used as the energy window reference,and the optimal charging and discharging interval for different energy window width coefficients is determined according to a certain algorithm.Finally,the energy window interval calculated based on the OCV curve is mapped to the voltage interval at a specific power to complete the SOC calibration.The SOC calibration test based on the on-site energy storage power station shows that the SOC operation range calibrated by the algorithm can determine the chargeable and dischargeable power and the chargeable and dischargeable energy at the same time,providing an accurate reference for the dispatching operation.
作者
李理
宋兴荣
吴晋波
贺晨
LI Li;SONG Xing-rong;WU Jin-bo;HE Chen(Electric Popwer Science Research Institute,State Grid Hunan Electric Power Co.,Ltd.,Changsha 410007,China;不详)
出处
《电力电子技术》
CSCD
北大核心
2022年第10期100-103,共4页
Power Electronics
基金
国网湖南省电力公司科技项目(5216A5210038)
关键词
储能电站
荷电状态
标定
energy storage power station
state of charge
calibration