Dynamic stability analysis of ac/dc power systems including nonlinear loads
Thesis/Dissertation
·
OSTI ID:5911638
This work analyses the effect of static and dynamic nonlinear loads on the dynamic stability and the design of stabilization controls for interconnected AC/DC power systems. Power system stabilizer, DC power modulation, and reactive power modulation controls are considered. Eigenvalue and eigenvalue sensitivity methods are used for dynamic stability prediction and linear optimal control theory is applied to the design of the gain of the modulation controllers. Dynamic simulation techniques are used to verify the results obtained from eigenvalue and eigenvalue sensitivity analysis. A new method is developed to calculate eigenvalue sensitivities of interconnected power systems. The proposed method is based on the component connection model (CCM) technique which allows a simple formulation of the partial derivatives of the system state variable A matrix which is necessary for eigenvalue sensitivity calculation. The method is applied to different problems in power system dynamic studies and the results show consistency with other published results. The effects of static and dynamic load characteristics are investigated, and it is shown that load characteristics have a significant effect on AC/DC system stability.
- Research Organization:
- West Virginia Univ., Morgantown, WV (USA)
- OSTI ID:
- 5911638
- Country of Publication:
- United States
- Language:
- English
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