Abstract: With the widespread application of renewable energy, the application of microgrid technology in distribution networks is receiving increasing attention. Taking a microgrid project in a certain region of Jilin Province as an example, this paper explores the design and application of microgrid systems. Research has shown that microgrids can quickly respond to load fluctuations with a response time of less than 5 seconds, and energy storage systems can quickly provide support during sudden load increases. During the high load period in winter 2023, the system did not shut down, and photovoltaic and wind power generation effectively complemented each other, ensuring stable power supply. The microgrid system has increased the acceptance capacity of renewable energy, with wind and solar contributing 45% and 35% respectively, and reducing carbon emissions by 8.5%. In addition, it effectively alleviates the pressure on the main power grid, providing empirical reference for the promotion and application of microgrid technology in the distribution network.