Novel AFD method with pulsation of chopping fraction for islanding prevention of grid-connected photovoltaic inverter
Novel AFD method with pulsation of chopping fraction for islanding prevention of grid-connected photovoltaic inverter
复制标题
并网光伏逆变器防孤岛效应的斩波分数脉动AFD新方法
DOI：
10.1109/epe.2005.219631
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Gwon
中科院分区：
文献类型：
--
作者：
Jae;Youngseok Jung;Gwon
提出了一种新的主动频率漂移（AFD）方法，用于光伏并网逆变器的孤岛预防。为了检测光伏并网逆变器的孤岛现象，考虑到孤岛现象对安全的危害以及对其他用电设备的损害，提出了多种反孤岛方法。其中，使用斩波分数（cf）的AFD方法使得孤岛检测能够在孤岛情况期间向上（或向下）漂移电压的频率。然而，传统的AFD方法的性能，其中只有一定的cf值，是低效的，并且难以设计合适的cf值分析，以满足谐波的限制。本文提出了一种基于AFD方法的周期斩波比。该方法显示了cf的分析设计值，以满足IEEE标准的测试程序。929-2000中的电能质量和孤岛检测时间。为了验证所提出的方法的有效性，孤岛测试结果。实验结果表明，与传统的AFD方法相比，该方法不仅具有更小的谐波失真，而且具有更好的孤岛检测性能
This paper proposes a novel active frequency drift (AFD) method for the islanding prevention of grid-connected photovoltaic inverter. To detect the islanding phenomenon of grid-connected photovoltaic (PV) inverters concerning about the safety hazards and the damage to other electric equipments, many kinds of anti-islanding methods have been presented. Among them, AFD method using chopping fraction (cf) enables the islanding detection to drift up (or down) the frequency of the voltage during the islanding situation. However, the performance of the conventional AFD methods, which have a certain value of cf only, is inefficient and difficult to design the appropriate cf value analytically to meet the limit of harmonics. In this paper, the periodic chopping fraction based on an AFD method is proposed. This proposed method shows the analytical design value of cf to meet the test procedure of IEEE Std. 929-2000 with the power quality and islanding detection time. To verify the validation of the proposed method, the islanding test results are presented. It is confirmed that the proposed method has not only less harmonic distortion but also good performance of islanding detection compare with the conventional AFD method