Performance improvement of shunt active power filter with dual parallel topology

被引:78
作者
Asiminoaei, Lucian [1 ]
Lascu, Cristian
Blaabjerg, Frede
Boldea, Ion
机构
[1] Danfoss Dr AS, DK-6300 Grasten, Denmark
[2] Univ Politehn Timisoara, Fac Elect Engn, RO-1900 Timisoara, Romania
[3] Aalborg Univ, Inst Energy Technol, DK-9220 Aalborg, Denmark
关键词
active filters; harmonic analysis; interconnected power systems; power system harmonic; pulse width modulated inverters;
D O I
10.1109/TPEL.2006.888912
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
This paper describes the control and parallel operation of two active power filters (APFs). Possible parallel operation situations of two APFs are investigated, and then the proposed topology is analyzed. The filters are coupled in a combined topology in which one filter is connected in a feedback loop and the other is in a feedforward loop for harmonic compensation. Thus, both active power filters bring their own characteristic advantages, i.e., the feedback filter improves the steady-state performance of the harmonic mitigation and the feedforward filter improves the dynamic response. Another characteristic of the proposed topology is the possibility of joint operation of both filters either as frequency-sharing or load-sharing, with or without redundancy. The frequency-sharing operation is possible due to the control algorithm, which is based on selective harmonic compensation using equivalent harmonic integrators. Implementation details and a discussion on the efficiency improvement for various switching, frequencies are provided. The evaluation of the proposed topology concludes that this approach is very practical for achieving both low and high order harmonic compensation and stable grid operation. This is supported by extensive measurement results on a 15-kVA laboratory setup, indicating a reduction in total harmonic current distortion from the existing 30 % to less than 2 % for a typical adjustable speed drive application.
引用
收藏
页码:247 / 259
页数:13
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