A method for optimal selection of voltage levels in building dc distribution systems
建筑直流配电系统的电压等级优选方法

摘要

建筑直流配电系统的电压等级优选是提高系统能效、降低损耗、保障供电安全的重要环节。根据建筑用电负荷特性、配电距离及设备兼容性等因素，合理选择电压等级可有效提升系统运行的稳定性与经济性。研究表明，不同应用场景下电压等级的优化需要综合考虑能量传输效率、线路损耗、设备投资及运维成本等多维指标。本文基于建筑直流配电的典型需求，提出一种多因素权衡的电压等级优选方法，构建技术经济综合评价模型，对多种电压方案进行比较分析，并通过实例验证方法的可行性与优越性。研究结果可为建筑直流配电系统设计提供参考，有助于推动绿色、高效、智能化建筑能源系统的发展。

Abstract

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.