Abstract
This paper constructs decision tree (DT) using C4.5 algorithm for online voltage stability assessment. The entire process includes three steps: sample acquisition, attribute selection and DT construction. First, P-V curves analysis is performed to generate samples for DT. Participation factor analysis and relief algorithm are then used to select attributes for DT. C4.5 algorithm is finally applied to construct DT. The case study on a practical power system demonstrates that DT can extract operating guidelines from offline voltage stability analysis results, and helps system operators assess voltage stability status in real-time.
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