On the model granularity and temporal resolution of residential PV-battery system simulation

Abstract

This paper investigates the impact of model granularity and temporal resolution on simulated energy flow items, self-sufficiency and self-consumption of grid-connected residential PV-battery systems. For such a purpose, three models with increasing levels of granularity are implemented for both PV modules and batteries. In addition, three temporal resolutions (i.e., 1 s, 1 min, and 1 h) of weather data and building electrical loads are considered. The simulation results for a PV-battery system in Lindenberg, Germany show that temporal resolutions have negligible impact on self-consumption and self-sufficiency, but cause noticeable differences of most power profiles observed in the PV-battery system. As for the impact of model granularity, the self-consumption is approximately 44% for the coarsest models, 48% for the models with the intermediate level of granularity, and 52% for the most refined models; the self-sufficiency is 83%, 78%, and 80%, respectively, for the three models.