Analysis of Forced Power Oscillation Under Stochastic Disturbance

作者：Xu, Jin; Wang, Keyou^*; Li, Guojie; Zhang, Bangling; Gao, Shengyu

来源：Journal of Shanghai Jiaotong University, 2017, 51(5): 563-569.

DOI：10.16183/j.cnki.jsjtu.2017.05.008

• Central frequency
• Forced oscillations
• Forced power oscillations
• Modal superposition
• Power spectral densities (PSD)
• Resonance frequencies
• Stochastic disturbances
• Synchronous machine

In order to study the forced power oscillation under stochastic disturbance, the mechanical power disturbance of synchronous machine was described by power spectral density (PSD), and the frequency response model of power system in the form of modal superposition was established. Based on PSD expression of synchronous machine power angle acquired by spectral analysis, four influence factors of forced power oscillation under stochastic disturbance were analyzed. In the New England 39-bus test system, the PSDs of power angle under the excitation of different stochastic disturbances were compared. Results showed that, when the PSD central frequency of disturbance coincides with the natural frequency of power system, the forced oscillation will have a high intensity and turn into a resonance from stochastic point of view. When the resonance happens, a higher centralization degree on the central frequency will lead to a more intensive oscillation. When the central frequency is near the resonance frequency, forced oscillations tend to be inspired by a lower centralization degree.

• 出版日期2017
• 单位上海交通大学