Fast Transient Stability Assessment Based on Data Mining for Large-Scale Power System

One of the most challenging problems in real-time operation of power system is the assessment of transient stability. Fast and accurate techniques are imperative to achieve on-line transient stability assessment (TSA). Based on the statistical learning theory, a novel learning-based nonlinear classifier, i.e., the support vector machines (SVMs) for TSA was presented here. In the approach, the feature variables, which describe the system state before and after the occurrence of a fault, were selected for TSA. Abundance of initial data was preprocessed by feature extraction to improve the data quality. By using SVM training, models were built and used to predict the operation state whether is stable or not for given operation data. The validity of the approach was verified by the simulation for the 4933-bus state grid of China system