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| Design of a Soft-Switching System Based on Single-Phase Grid-Connected Inverter |
| Cai Hui, Guo Yu, Chen Weimin, Li Qing, Yan Hong |
| 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 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.
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Received: 26 March 2014
Published: 28 April 2016
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2016, Vol. 31 
