Fault Analysis and Power Supply Reliability Analysis Considering the Dual Impact of Microgrids

With the acceleration of the “dual carbon” process, microgrids are showing a trend of large-scale development. The microgrid has changed the original single and radial network structure of the distribution network, which will bring a series of positive and negative impacts on the operation characteristics and power supply reliability of the distribution network. How to adapt the distribution automation configuration to the large-scale microgrid access is an urgent research issue. This article starts with the study of the microgrid's impact on the process and effectiveness of distribution automation, and analyzes the influence of microgrids on line protection and fault location during equipment failures. On the basis of considering the dual impact of microgrids and traditional reliability analysis models, the load penetration rate of microgrids and the proportion of photovoltaic power generation periods are introduced to establish a power supply reliability analysis model that takes into account the dual impact of microgrids, quantifying the impact of increasing the proportion of microgrids on power supply reliability.