Islanding Detection of Distributed Generation Using Electrical Variables in Space Vector Domain
Islanding Detection of Distributed Generation Using Electrical Variables in Space Vector Domain
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DOI：
10.1109/tpwrd.2019.2929784
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发表时间：
2020-04
影响因子：
4.4
通讯作者：
M. Alam;M. H. A. Begum;B. Mather
中科院分区：
文献类型：
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作者：
M. Alam;M. H. A. Begum;B. Mather
本文提出了一种新的孤岛检测方法，在配电系统中，包括同步发电机为基础的分布式电源。该方法首先利用孤岛情况下的三个电气变量的动态方程。变量是：频率变化;频率变化率;和转子角度偏差。其次，在空间矢量域中对这些变量进行变换，得到三个参数，即半长轴、半短轴和倾角。最后，利用这些参数，一个决策边界的建立，以分类网格事件导致形成一个岛或没有。所提出的方法进行了全面的调查，在不同的操作条件下，其中包括过剩/赤字的无功/有功功率不平衡的情况下，在形成的岛屿包含不同的负载类型（恒定阻抗，恒定功率，恒定电流）与不同的品质因数。在OPAL-RT数字仿真平台上对一个实际配电网进行了真实的实时仿真，在上述运行条件下产生了大量的孤岛和非孤岛事件。详细的评估所提出的方法进行，它表明了该方法的有效性。
This paper presents a new approach for islanding detection in distribution systems incorporating synchronous generator-based distributed generations. The proposed method first utilizes the dynamic equations of three electrical variables under islanding situations. The variables are: change of frequency; rate of change of frequency; and rotor angle deviation. Second, transformation of these variables is conducted in the space vector domain, which gives rise to three parameters, namely, semi-major axis, semi-minor axis, and inclination angle. Finally, exploiting these parameters, a decision boundary is established to classify grid events resulting in the formation of an island or not. The proposed method is comprehensively investigated under different operating conditions, which include excess/deficit of reactive/active power imbalance scenarios in the formed island containing different load-types (constant impedance, constant power, and constant current) with varying quality factor. A large variety of islanding and non-islanding events are generated using a practical distribution network simulated in real time on OPAL-RT digital simulation platform under the aforementioned operating conditions. A detailed evaluation of the proposed approach is conducted and it demonstrates the effectiveness of the method.