A novel feature selection and extraction method for neural network based transfer capability assessment of power systems

Muhammad Murtadha Othman, A. Mohamed, A. Hussain
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引用次数: 1

Abstract

A new feature selection and extraction method is presented in this paper for the neural network (NN) based available transfer capability assessment in the deregulated power system. The objective of feature selection and extraction is to speed up the NN training process and to achieve a more accurate NN results. The proposed method is known as the SDFT method in which it is a combination of the sensitivity and discrete Fourier transform methods. The sensitivity analysis is first used in selecting the input features and then followed by the discrete Fourier transform (DFT) method for extracting NN input features. The hypothesis set of pre-selected data performed by the sensitivity method only offers no improvement in the NN training performance in such cases where many features are highly correlated. Thus, the DFT method is considered so as to extract the pre-selected data to a set of meaningful extracted data. To illustrate the effectiveness of the proposed method, a comparative study of the SDFT, DFT and sensitivity methods is made so as to investigate the effectiveness of the methods in extracting and selecting the NN features. In this study, the NN based available transfer capability assessment has been performed on the Malaysian power system.
一种新的基于神经网络的电力系统传输能力评估特征选择与提取方法
提出了一种基于神经网络的电力系统可用传输能力评估的特征选择与提取方法。特征选择和提取的目的是为了加快神经网络的训练速度,获得更准确的神经网络训练结果。所提出的方法被称为SDFT方法,它是灵敏度和离散傅里叶变换方法的结合。首先采用灵敏度分析选择输入特征,然后采用离散傅立叶变换(DFT)方法提取神经网络输入特征。灵敏度法对预选数据进行假设集,仅在许多特征高度相关的情况下,对神经网络的训练性能没有改善。因此,考虑使用DFT方法将预先选择的数据提取为一组有意义的提取数据。为了说明所提方法的有效性,对SDFT、DFT和灵敏度方法进行了比较研究,以考察这些方法在提取和选择神经网络特征方面的有效性。本文对马来西亚电力系统进行了基于神经网络的可用输电能力评估。
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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