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arXiv 2211.02776eess.SP
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使用机器学习的微电网高阻抗故障检测

Detection of High Impedance Faults in Microgrids using Machine Learning

Pallav Kumar Bera, Vajendra Kumar, Samita Rani Pani, Vivek Bargate

AI总结:

本文利用机器学习和小波特征构建差动保护模型,在5母线微电网仿真中有效区分含高阻抗故障的内部故障与CT饱和外部故障,提升微电网保护的安全性与可靠性。

摘要:

本文提出了连接微电网中风电场配电线路的差动保护方法。基于机器学习(ML)的模型利用从线路两端电流中提取的差动特征来辅助继电保护决策。通过对大量特征进行特征选择后获得的小波系数被用于训练分类器。内部故障与带有电流互感器(CT)饱和的外部故障被区分开来。内部故障包括高阻抗故障(HIF),其电流非常小,考验着传统继电器的可靠性。这些故障在PSCAD/EMTDC中的一个5母线系统中进行了仿真。结果表明,基于机器学习的模型能够有效区分故障和其他暂态现象,并有助于维持微电网运行的安全性和可靠性。

英文摘要:

This article presents differential protection of the distribution line connecting a wind farm in a microgrid. Machine Learning (ML) based models are built using differential features extracted from currents at both ends of the line to assist in relaying decisions. Wavelet coefficients obtained after feature selection from an extensive list of features are used to train the classifiers. Internal faults are distinguished from external faults with CT saturation. The internal faults include the high impedance faults (HIFs) which have very low currents and test the dependability of the conventional relays. The faults are simulated in a 5-bus system in PSCAD/EMTDC. The results show that ML-based models can effectively distinguish faults and other transients and help maintain security and dependability of the microgrid operation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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