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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
    
Design of soft-switching system on three-phase load balance for IDC electric power
CAI Hui, GUO Yu, YAN Hong, CHEN Wei-min, LI Qing
College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
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Abstract  

A soft-switching system based on single-phase inverter power was proposed to improve the safety and efficiency of internet data center（IDC). This system balances three-phase power supply by adjusting the power supply of the electric equipments. Before switching, the inverter tracks the original access phase. The system switches the load from the original access phase to the inverter supply after the synchronization. At the inverter supplying time, the inverter tracks the alternative access phase. The system switches the load from the inverter to the alternative access phase supply after the synchronization. The cause of the impulse current and the inhibition method were analyzed. Simulation and experiment were used to carry out verification for this system. The result shows that there is no impulse current when the electric equipments are switched when the voltage passes zero. The system achieves “soft-switching” well without impulse current during the load being switched among different power supply phases.

Published: 01 December 2014
CLC:  TM 734  
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CAI Hui, GUO Yu, YAN Hong, CHEN Wei-min, LI Qing. Design of soft-switching system on three-phase load balance for IDC electric power. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(12): 2210-2215.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.12.015     OR     http://www.zjujournals.com/eng/Y2014/V48/I12/2210


IDC电力三相平衡配电柔性切换系统的设计

为提高网络数据中心（IDC）的供电安全和供电效率,提出一种基于单相逆变电源的柔性切换系统.该系统通过调整用电设备的供电相来达到三相平衡配电的目的.切换前,让逆变器跟踪原接入相电压,同步后将负载切换到逆变器供电；逆变器供电时,跟踪备选接入相电压,同步后将负载切换到备选接入相供电,完成切换.分析了冲击电流产生的原因及抑制方法,并通过仿真和实验对理论分析及系统性能进行验证.结果表明：当系统在电压过零点时切换,负载上几乎没有冲击电流,该系统能很好地完成负载在相间的无跳动柔性切换.

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