Research on Energy Storage Type of Uninterruptible Power Supply Technology in Internet Data Center

As the batteries of Uninterruptible Power Supply (UPS) in the Internet Data Center (IDC) is only effective in the case of power failures, the large amounts of batteries are idle during normal operation. To meet the efficient, green and reliable power supply requirements of IDC, and activate the "sunk asset" of UPS batteries, the Energy storage type of UPS (EUPS) architecture with bidirectional power regulation and active grid support is proposed in this paper. The main target is to maximize the use of batteries in UPS through the function upgrading from backup to energy storage. The topology and control strategy of EUPS are analyzed first. And the cooperative mechanism of EUPS participating in the grid fast frequency and voltage regulation, AGC, AVC, peak-valley shaving and their combined is interpreted accordingly. Finally, the effectiveness of EUPS and its control strategy are verified through simulation cases.