A Low-Voltage Ride-Through Technique for Grid-Connected Converters With Reduced Power Transistors Stress

被引:49
|
作者
Chen, Hsin-Chih [1 ]
Lee, Chia-Tse [1 ]
Cheng, Po-Tai [1 ]
Teodorescu, Remus [2 ]
Blaabjerg, Frede [2 ]
机构
[1] Natl Tsing Hua Univ, Dept Elect Engn, Ctr Adv Power Technol, Hsinchu 300, Taiwan
[2] Aalborg Univ, DK-9100 Aalborg, Denmark
关键词
Active power ripple; distributed energy resources (DERs); grid-connected converter; low-voltage ride-through (LVRT); CONTROL STRATEGIES; CAPACITOR STRESS; CONTROL SCHEME; UNBALANCE; SAG;
D O I
10.1109/TPEL.2016.2522511
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
With more and more distributed energy resources being installed in the utility grid, grid operators start imposing the low-voltage ride-through requirement on such systems to remain grid-connected and inject reactive and/or active current to support grid voltage during fault conditions. This paper proposes a positive and negative sequence current injection method to meet such requirement. In the meantime, the proposed method can reduce the second harmonic ripples in the dc link of the power converter without violating the peak current constraint of the power transistors. The long-term reliability of the converter system can thus be improved.
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页码:8562 / 8571
页数:10
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