Real-time testing of a WPT-based protection algorithm for three-phase power transformers
Real-time testing of a WPT-based protection algorithm for three-phase power transformers
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DOI：
10.1109/ias.2004.1348816
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发表时间：
2004-11
影响因子：
4.4
通讯作者：
S. Saleh;M. Rahman
中科院分区：
文献类型：
--
作者：
S. Saleh;M. Rahman
本文提出了一种基于小波包变换的电力Transformer保护算法的实时实现和测试。所提出的算法实现使用DS1102数字信号处理器板和两个不同的三相电力变压器上进行测试。不同的励磁涌流，正常（通过故障）和内部故障电流进行了研究，为不同的负载条件。结果表明，该方法完全独立于Transformer参数和电流Transformer饱和。此外，该算法具有计算量小、速度快、精度高、占用内存少、可靠性高等优点。在所有情况下的调查内部故障，所提出的算法是能够识别故障，并产生一个跳闸信号，在不到四分之一周期的基础上，60 Hz的系统。
This paper presents real-time implementation and testing of a wavelet-packet-transform-based algorithm for power transformer protection. The proposed algorithm is implemented using a DS1102 digital signal processor board and tested on two different three-phase power transformers. Different magnetizing inrush, normal (through-fault) and internal fault currents are investigated for different loading conditions. The results show a complete independence from both the transformer parameters and current transformer saturation. In addition, the proposed algorithm has reduced computational burden, high speed, high accuracy, small required memory, and high reliability. In all cases of the investigated internal faults, the proposed algorithm is capable of identifying the fault and generating a trip signal in less than a quarter cycle based on a 60-Hz system.