Abstract
A novel method of power system transient stability assessment based on principal component analysis is proposed. Firstly, rotor angles after fault removal measured by wide area measurement system (WAMS) are utilized as the original data. Secondly, do principal component analysis on these data., obtaining the covariance matrix and its eigenvalues and eigenvectors. Next, PCA transform is used to construct principal component virtual generator. After that, equal area criterion (EAC) is used to evaluate the transient stability of the first principal component virtual generator, which is consistent with the stability of the original system. Case studies are conducted on the New England 10-machine 39-bus system, IEEE 16-machine 68-bus system and Northeast Power Coordinated Council 48-machine 140-bus system respectively to verify the similarity of transient stability between the original system and the first component virtual generator.
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