Reliability Analysis of WTG-PV-ESS Microgrid System

Increasing the proportion of renewable energy connected to the grid is the one way to achieve "2030 carbon peak" and "2060 carbon neutral", but the intermittent, volatility and randomness of renewable energy output will bring severe challenges to the stable operation of the microgrid. Through reliability analysis, it can not only qualitatively describe the impact of renewable energy output on the microgrid reliability, but also give a quantitative basis for microgrid planning. Therefore, this paper first established a wind, solar, energy storage system model, and then introduced reliability indicators and written evaluation procedures as the basis for analysis. Finally, an example system was built with the improved IEEE-RBTS BUS6 F4 system to evaluate the changes in the proportion of photovoltaic capacity, the influence of wind and solar proportion rate and ESS capacity changes on system reliability. The results show that the combined effect of the wind and solar proportion rate and the ESS capacity will have a significant impact on the reliability of the system.