Analysis of DFIG Differential Protection based on Park Transform

Janailson Maciel De Queiroz, L. S. Barros, D. Barbosa
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Abstract

In recent years, the use of wind energy in the world has grown. Consequently, the need for studies related to the impact of wind turbines on the electrical system has increased including protection of them and associated equipment. For DFIG-based wind turbines, differential protection has recently been proposed, however, there are few studies on this type of application and in this paper it proposes criteria in the decision-making using the Park transform in which, in addition to the restriction current, voltage level and current direction at the stator terminals are considered. In a DFIG operating with 1.51 MW tests of faults internal and external to the protection zone were made, of the single-phase and three-phase type with various levels of voltage drops. Interturn faults in the rotor and stator of the machine were also tested with various levels of defects. So, with the proper definition of the operating logic, it was possible to show the effectiveness of the protection.
基于Park变换的DFIG差动保护分析
近年来,世界上对风能的利用有所增长。因此,需要对风力涡轮机对电力系统的影响进行研究,包括对它们和相关设备的保护。对于基于dfige的风力发电机组,差动保护最近被提出,然而,对这类应用的研究很少,本文提出了使用Park变换进行决策的准则,其中除了限制电流外,还考虑了定子端电压水平和电流方向。在运行功率为1.51 MW的DFIG中,对具有不同电压降水平的单相和三相型保护区内和保护区外的故障进行了试验。转子和定子的匝间故障也进行了不同程度的缺陷测试。因此,通过对操作逻辑的适当定义,可以显示保护的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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