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首页> 外文期刊>Electric power systems research >An algorithm using a shape-based approach in Park's plane for transformer differential relaying on the basis of time-dependent symmetrical components
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An algorithm using a shape-based approach in Park's plane for transformer differential relaying on the basis of time-dependent symmetrical components

机译：基于时态对称分量的Park平面中基于形状的方法用于变压器差分继电的算法

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摘要

Discrimination between inrush transients and internal faults is an issue of most concern in differential relaying when protecting power and distribution transformers. Based on an analysis of the symmetrical components obtained during inrush and during internal fault conditions, a linkage between their instantaneous evolution and the shapes of plots in Park's plane is presented in this paper. The use of Park transformation allows to avoid conventional spectrum analysis, what results in a quite simplified protective technique. By introducing a vector, which is defined as the sum of the vectors corresponding to measurements in both sides of the transformer, a categorization of shapes of plots is done here. Thus, a shape-based rule is presented for discriminating between inrush and fault in this paper. In addition, an algorithm is presented for fast classification of shapes. The proposed algorithm is based on the periodicity generated by the modulus of the defined Park's vector. The approach presented in this paper has been tested in a laboratory transformer, showing a robust, accurate and fast performance.
机译：在保护电源和配电变压器时，区分瞬态和内部故障是差分继电器中最需要关注的问题。在分析突入和内部断层条件下获得的对称分量的基础上，本文提出了它们的瞬时演化与Park平面中的样点形状之间的联系。使用Park变换可以避免传统的频谱分析，从而可以简化保护技术。通过引入一个矢量，该矢量被定义为对应于变压器两侧测量值的矢量的总和，在此完成了图形形状的分类。因此，本文提出了一种基于形状的规则来区分涌入和断层。另外，提出了一种用于形状的快速分类的算法。所提出的算法基于由定义的Park向量的模数生成的周期性。本文介绍的方法已在实验室变压器中进行了测试，显示出稳定，准确和快速的性能。

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