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New control approach for four-wire active power filter based on the use of synchronous reference frame

机译：基于同步参考系的四线有源功率滤波器控制新方法

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Since the development of the first theories for the active power filters (APF) control, many efforts have been concentrated to improve their performances because the number of non-linear loads did not stop to increase. Moreover, the appearance of non-linear load of different types, three-phase or single-phase, provokes unbalanced system, which requires more elaborated controls especially in term of robustness. For the unbalanced non-linear loads, the reduction of neutral current is one of the two aims of different APF's controls studied in this paper. This will be highly appreciated by the distribution networks. The second aim is naturally to obtain an acceptable THD for each line current. In this paper, three control methods, all based on the instantaneous powers theory introduced by H. Akagi [H. Akagi, Y. Kanazawa, A. Nabae, Generalized theory of the instantaneous reactive power in three-phase circuits, in: Proceedings of International Power Electronics Conference, Tokyo, Japan (1983) 1375-1386.] are compared and advantages and drawbacks of each approach are discussed. Then, the improvements will be presented for these controls so as to obtain better results in case of unbalanced system. The simulation results will show the effectiveness of these improvements. Finally, in order to improve again the performances of APF, a new control is proposed. This approach is based on the use of synchronous reference frame and its effectiveness will be validated through numerical simulations.
机译：自从针对有源功率滤波器（APF）控制的第一个理论发展以来，由于非线性负载的数量没有停止增加，因此已经集中了很多努力来改善其性能。此外，三相或单相不同类型的非线性负载的出现引起了系统的不平衡，这需要更加精细的控制，尤其是在鲁棒性方面。对于不平衡的非线性负载，减少中性点电流是本文研究的不同APF控制的两个目标之一。分销网络将高度赞赏这一点。第二个目的自然是为每个线路电流获得可接受的THD。在本文中，三种控制方法均基于H. Akagi提出的瞬时功率理论。 Akagi，Y. Kanazawa，A. Nabae，三相电路中的瞬时无功功率的广义理论，在：International Power Electronics Conference的会议记录，东京，日本（1983）1375-1386。]比较了该方法的优缺点。讨论每种方法。然后，将对这些控件进行改进，以便在系统不平衡的情况下获得更好的结果。仿真结果将显示这些改进的有效性。最后，为再次提高APF的性能，提出了一种新的控制方法。该方法基于同步参考框架的使用，其有效性将通过数值模拟得到验证。

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