Journal of Electrical Engineering and Automation

The optimal selection of voltage levels in building DC distribution systems is a crucial link for improving system energy efficiency, reducing losses, and ensuring power supply safety. Reasonable selection of voltage levels based on factors such as building electrical load characteristics, distribution distance, and equipment compatibility can effectively enhance the stability and economy of system operation. Studies have shown that the optimization of voltage levels in different application scenarios requires comprehensive consideration of multi-dimensional indicators, including energy transmission efficiency, line losses, equipment investment, and operation and maintenance costs. Based on the typical requirements of building DC distribution, this paper proposes a voltage level optimization method that balances multiple factors, constructs a comprehensive technical and economic evaluation model, conducts comparative analysis of various voltage schemes, and verifies the feasibility and superiority of the method through practical examples. The research results can provide a reference for the design of building DC distribution systems and help promote the development of green, efficient, and intelligent building energy systems.

Building DC distribution system; Voltage level; Optimal selection method; Energy efficiency improvement; Economic analysis