Design of Low Carbon AC/DC Distribution Network for Coal Mines Based on Electrical Energy Routers Cluster

The goal of “optimizing coal mine energy consumption” is clearly proposed in the intelligent coal mine construction guide (2021 version). In the “Evaluation and Management Measures for Intelligent Construction of Coal Mines” (2023 version) issued by Shanxi Province, it is explicitly mentioned that “green energy such as photovoltaic, wind, and gas should be used to achieve energy self-circulation”. In order to achieve the above goals and meet the growing high power demand in the coal mines, the paper adopted the high-voltage DC power supply line constructed by the dual electrical energy router cluster, and constituted with the existing AC supply line in the coal mine, formed a low-carbon, autonomous, and efficient coal mine hybrid distribution network. The topology and connection relationship of the electrical energy router and power quality management device were exampled. Also, the management platform function of the mixed distribution network was explained. The results indicated that the construction of the mixed low-carbon distribution network for coal mines can effectively reduce the cost in production activities, improve the proportion and efficiency of renewable energy, and reduce energy consumption costs in the coal mine production process without reducing the reliability of the power supply system.