Comparative analysis of energy efficiency of AC and DC power supply systems in different regions and buildings

Abstract

With the advantages of high-efficiency access to distributed photovoltaic power sources and energy storage, DC power distribution systems have gradually become one of the key power distribution forms for the development of net zero energy building structures. This research aims to explore the influencing factors of AC and DC energy efficiency improvement and find a distribution network system that is more in line with future net zero energy buildings under the premise of sustainable development. The energy efficiency and the improvement of AC and DC energy efficiency are compared after the factors that are in line with the characteristics of net zero energy buildings are substituted into various power grids. In terms of energy efficiency, find a more efficient topology of AC and DC systems. In order to better simulate the net zero energy building structure, the energy storage-friendly energy efficiency calculation method and fifteen different regional samples in Beijing, Shanghai and Shenzhen were used in the study. And through correlation analysis and control variable method to verify the advantages of different types of power distribution systems for different environments. Research has discovered a power distribution transmission system with a separate topology structure that is more in line with the efficient energy use of net zero energy buildings. The results provide theoretical support and calculation guidance basis for the future development of net zero energy buildings and the selection of power distribution systems with multi-regional structures.