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Real-time fault analysis of transmission lines using wavelet multi-resolution analysis based frequency-domain approach

机译：基于小波多分辨率分析的频域实时传输线故障分析

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摘要

In a power system, transmission lines are prone to faults of different nature, which challenge the system stability and reliability. Thus system performance analysis under such fault conditions has drawn attention of researchers. Particularly, the advent of fast and efficient data acquisition using higher sampling rates combined with high speed digital signal processors has paved the way for efficient digital real-time simulations. Though sustained efforts have been made by different researchers to develop some good real-time digital simulators, this study is an attempt to implement a laboratory prototype model of a 20 V, 200 km transmission line, representing a 400 kV extra-high voltage transmission line, so as to improve the real time performance. In addition, efficient National Instruments based data acquisition system in conjunction with LabVIEW has been incorporated to acquire the best possible representative data with commensurate characterisation and transmission with fidelity. The unique contributions of this real-time fault analysis laboratory hybrid model are accurate fault detection and classification using a frequency-domain approach having immunity to fault impedance and fault inception angle, which affect the time-domain analyses severely. It is also equipped with visual displays so that even non-experts can use it for planning and decision-making purposes.
机译：在电力系统中，传输线容易​​出现不同性质的故障，这会挑战系统的稳定性和可靠性。因此，在这种故障条件下的系统性能分析引起了研究人员的关注。特别是，结合使用更高的采样率和高速数字信号处理器进行快速，高效的数据采集的出现，为高效的数字实时仿真铺平了道路。尽管不同的研究人员一直在努力开发一些良好的实时数字仿真器，但本研究试图实现代表20 kV 200 km传输线（代表400 kV超高压传输线）的实验室原型模型。 ，以提高实时性能。此外，高效的基于National Instruments的数据采集系统与LabVIEW结合使用，可通过适当的表征和保真度传输来采集最佳的代表性数据。这种实时故障分析实验室混合模型的独特贡献是使用对故障阻抗和故障起始角度具有免疫力的频域方法进行准确的故障检测和分类，从而严重影响了时域分析。它还配备了可视显示器，因此，即使非专业人士也可以将其用于计划和决策目的。

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