Battery loss prediction using various loss models: A case study for a residential building

卷:70

Article

关键词: LITHIUM-ION;    SELF-CONSUMPTION;    PHOTOVOLTAIC SYSTEMS;    ECONOMIC-BENEFITS;    STORAGE;    PV;    PROFITABILITY;    OPTIMIZATION;    PERFORMANCE;    LOAD;   

DOI  :  10.1016/j.est.2023.108048

来源: SCIE

【 摘 要 】

This work compares and quantifies the annual losses for three battery system loss representations in a case study for a residential building with solar photovoltaic (PV). Two loss representations consider the varying operating conditions and use the measured performance of battery power electronic converters (PECs) but differ in using either a constant or current-dependent internal battery cell resistance. The third representation is load-independent and uses a (fixed) round trip efficiency. The work uses sub-hourly measurements of the load and PV profiles and includes the results from varying PV and battery size combinations. The results reveal an inadequacy of using a constant battery internal resistance and quantify the annual loss discrepancy to -38.6%, compared to a case with current-dependent internal resistance. The results also show the flaw of modelling the battery system's efficiency with a fixed round trip efficiency, with loss discrepancy variation between -5 to 17% depending on the scenario. Furthermore, the necessity of accounting for the cell's loss is highlighted, and its dependence on converter loading is quantified.

【 授权许可】

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