Study on Low Frequency Oscillatory Active Power Increment Distribution Based On Transmission Network Structure-Preserving Model

Based on the structure-preserving power system model, the linearized state space with detailed generator model, excitation system model and dynamic load model has developed. The novel method for calculating low frequency oscillatory active power increment distribution by employing the eigenvalues and eigenvectors of the linearized state matrix is presented. The method not only can be applied to calculate oscillatory active power increment distribution over generators, transmission lines and loads, but also can be used to analyze the effects of load on power system low frequency oscillatory. Simulations carried on four-machines example system testify the validation of the proposed method.