Abstract
As the quantity of direct current (DC) load and wireless power transmission (WPT) devices are continuously increasing in building, in order to efficiently utilize renewable energy (which outputs DC power) such as photovoltaic (PV), especially for building integrated photovoltaic (BIPV), and regeneration energy from elevators (which also outputs DC power), a novel building power distribution system architecture is explored in consideration of the characteristics of supply and demand-side in this paper. The proposed architecture is a hybrid framework integrated with conventional alternating current (AC) power distribution system, DC power distribution and WPT system. The applied AC and DC hybrid power distribution system has higher conversion efficiency than a single AC power system, which indicates that the former is becoming an important trend of building power distribution. In addition, the results of experimental test in a case study suggest that the proposed architecture can provide fine service for efficient application of renewable energy and regeneration energy in building. The obtained results also can serve as a foundation to promote the development of building power distribution system and related practical application in building.
Highlights
Since the 1880s, Tesla and Edison have had a drastic debate on the technology of direct current (DC) or alternating current (AC) power distribution
The existing building power distribution system is based on AC system, so that DC energy should be converted from DC to AC, AC to DC
This paper analyzes the three major changes in building power distribution system based on the demand-side: (1) The characteristics of distributed energy; (2) the increase of DC load; (3) the trend of wireless power transmission (WPT) demand
Summary
Since the 1880s, Tesla and Edison have had a drastic debate on the technology of direct current (DC) or alternating current (AC) power distribution. From the point of the demand-side, there are plenty of loads in building that require DC power supply, such as computer and network equipment, Light Emitting Diode (LED) lighting, elevators, inverter air-conditioners, and electric vehicle batteries which will be widely used in future. From the point of supply-side, there is a significant increase in the field of distributed energy [1,2,3,4,5,6,7] resources. These sources include renewable energy of elevators, photovoltaic power, micro turbines, wind power, and fuel cells, all of which can provide DC power to the building. It is urgent to develop a DC distribution system to adapt to the needs of DC renewable energy and DC load
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