Performance Improvement of Shunt Active Power Filter With Dual Parallel Topology
Performance Improvement of Shunt Active Power Filter With Dual Parallel Topology
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DOI：
10.1109/tpel.2006.888912
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发表时间：
2007-01
影响因子：
6.7
通讯作者：
L. Asiminoaei;C. Lascu;Frede Blaabjerg;Ion Boldea
中科院分区：
文献类型：
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作者：
L. Asiminoaei;C. Lascu;Frede Blaabjerg;Ion Boldea
本文介绍了两个有源电力滤波器的控制和并联运行。研究了两个apf可能并行运行的情况，并对所提出的拓扑结构进行了分析。滤波器耦合在一个组合拓扑中，其中一个滤波器连接在反馈回路中，另一个连接在前馈回路中进行谐波补偿。因此，两种有源电力滤波器都有各自的特性优势，即反馈滤波器改善了谐波缓解的稳态性能，前馈滤波器改善了动态响应。所提出的拓扑结构的另一个特点是两个滤波器的联合操作的可能性，无论是频率共享或负载共享，有或没有冗余。该控制算法基于等效谐波积分器的选择性谐波补偿，实现了频率共享。给出了实现细节和对各种开关频率下效率提高的讨论。对所提出的拓扑结构的评估表明，该方法对于实现低阶和高阶谐波补偿和电网稳定运行都是非常实用的。在15kva实验室装置上的广泛测量结果支持了这一点，表明在典型的可调速驱动应用中，总谐波电流畸变从现有的30%减少到不到2%
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