【摘要】 基于网络数据中心(IDC)的三相供电系统,提出一种基于单相逆变器的柔性切换系统。该系统通过调整各个设备组所在电网供电相位置来达到三相平衡配电的目的。分析了该系统的逆变器并网控制策略,对逆变器采用电压控制模式,并提出在负载电压过零点时进行切换,可以避免负载中产生冲击电流。同时分析了逆变器并网过程中,环流产生的原因及其影响。该系统可很好地完成IDC设备在不同电网相位间的无跳动柔性切换。更多还原

【Abstract】 A soft-switching system based on single-phase inverter is proposed for the three-phase power supply system of internet data center(IDC) in this paper. By adjusting the grid phase of which each equipment group is connected, the system can reach the purpose of three-phase equilibrium distribution. This paper analyses the control strategy of grid-connected inverter in this system. The inverter adopts voltage control mode and switches at the crossing point of load voltage that can prevent load from producing impact current. The causes and effects of circulating current during the grid-connected process are also analyzed. The system can realize IDC equipment’s soft-switch in different grid phases without dash current.更多还原