Simulation Study of AC and DC Distribution Efficiency in an Office Room in Shenzhen

DC power supply in building sector is a promising form of power supply. Compared with traditional AC power supply, it has potential in reducing power loss and integration with renewables energies. This paper presents a comparative analysis of the quantitative energy consumption of building DC power supply and traditional AC power supply. Based on the analysis of the energy consumption curve of the office space in Shenzhen, this study established an electrical load model in a typical office scenario, and at the same time established a DC microgrid system suitable for typical office environment, including energy storage, photovoltaic modules, and electrical energy conversion devices. Subsequently, PSIM and Simulink are used to realize the simulation analysis of the electric load model in the operation of the DC microgrid and the power consumption of the AC grid. Finally, it is concluded that the use of the DC microgrid system reduces the energy consumption by 17.57% compared to the AC power supply on a typical day. Moreover, the optimization direction and prospects of building DC power supply are given in terms of circuit topology and control algorithm.