Experimental study on the control strategies of DC power supply and storage in buildings

In order to improve the electricity generation and distribution efficiency, it is very import to shave electricity load peak and to fill the load valley. Direct current (DC) power supply and distributed electricity storage is considered to be a promising way to achieve the electricity load shift. This paper studies the control strategies of the DC power supply and distributed electricity storage in buildings. Three types of control strategies are developed, which are constant power from grid, demand response mode, and minimum electricity cost mode. The three control strategies are verified both at a small test bed and at an actual office building using DC power. Experiment results show that the developed three control strategies all can achieve the expected load shift purposes. In addition, through the power supply performance test of the DC power supply and distributed electricity storage system at the test bed and actual DC power building, the power supply stability and energy saving potential of the DC power distribution system as well as the applicability of the three control strategies are further verified.