Abstract: To save energy and protect environment and reduce the apparatus room construction cost of data center, this paper introduces new energy into the power supply system and establishes the power supply system of green data center. This paper introduces the existing data center power supply modes, analyzes the deficiency of the traditional power supply mode, and designs DC power supply system of data center including PV generation, energy storage device, AC grid and load. On the basis of bus voltage stability control, the system operation is divided into eight operating modes to control the corresponding converter according to system operating mode and local information. This paper proposes the energy control strategy for the DC power supply system of green data center, which can ensure the reliability of power supply by coordinating and controlling the active power. Via Matlab/Simulink software, the simulation models of system are built respectively under grid-connection and grid-disconnection operations, the result of which verifies the feasibility of the proposes control strategy.

Key words: green data center, DC power supply, energy saving, coordinated control, reliability