A comprehensive study on reliability performance of photovoltaic-battery-based microgrids under different energy management strategies

As the demand for power reliability keeps rising in modern society, the integration of energy storage systems into power networks increases at an unprecedented rate. Meanwhile, reliability analysis and enhancement of a power network attracts more and more attention. This paper explores the impact of four different energy management strategies (EMSs) on the reliability of microgrids, which play an important role in future distribution networks. The reliability performance is analysed on different levels, including converter interfaces and battery storage units on device level as well as power supply reliability on system level. The numerical analysis has shown that the employed EMS can remarkably affect the reliability indices of the system. The battery lifetime can be increased by more than 50% and annual energy loss can be reduced by up to 92%. Since the economic decision-making depends on the components lifetime and overall system performance, this paper provides deep insights for power engineers to properly design, plan and control future microgrids.