عنوان	Transient stability assessment model with sample selection method based on spatial distribution
نوع پژوهش	داوری و نظارت بر فعالیت‌های پژوهشی
کلیدواژه‌ها	deep learning, sample imbalance, sample selection, smart grid, transient stability assessment
چکیده	With the phasor measurement units (PMUs) are widely utilized in power systems, a large amount of data can be stored. If transient stability assessment (TSA) method based on deep learning model is trained by this dataset, it requires high computation cost. What’ more, the fact that unstable cases rarely occur would lead to an imbalanced dataset. Thus, power system transient stability status prediction has the bias problem caused by the imbalance of sample size and class importance. Faced with such a problem, a TSA model based on sample selection method is proposed in this paper. Sample selection aims to optimize the training set to speed up the training process while improve the preference of TSA model. The typical samples which can accurately express the spatial distribution of the raw dataset are selected by proposed method. Primarily, based on the location of training samples in the feature space, the border samples are selected by trained support vector machine (SVM) and the edge samples are selected by the assistance of the approximated tangent hyperplane of a class surface. Then, the selected samples are input to stacked sparse auto-encoder (SSAE) as the final classifier. Simulation results in IEEE 39-bus system and the realistic regional power system of Eastern China shows the high performance of the proposed method.
پژوهشگران	سید علیرضا بشیری موسوی (داور)