Shanxi Fenxi Duancun: “Photovoltaic Storage DC Flexibility” Illuminates the “Zero-Carbon Village”

Recently, Duancun in Fenxi County, Linfen City, Shanxi Province, established a “photovoltaic-storage-directivity” intelligent microgrid, achieving 100% green electricity usage in the entire village. The total scale of rooftop photovoltaics in this village reaches 1.1 megawatts, and distributed and centralized photovoltaic grid connection is used to solve energy supply issues. To address problems such as reactive power return and fault troubleshooting, Duancun has installed energy storage devices to reduce peak loads and utilize surplus electricity locally; direct current distribution technology is used to improve transmission efficiency and reduce conversion losses; flexible interaction is utilized to achieve coordinated balance among power generation, grid connection, load, and storage. This system has increased the system conversion efficiency from 82% to 91%, effectively reducing the risk of overload and voltage violations, while also eliminating the need for inverter and rectifier equipment, thus reducing investment costs. In addition, Duancun has simultaneously implemented coal-to-electricity conversion projects, which are expected to reduce annual carbon dioxide emissions by 1,284 tons.