A new methodology for small-signal stability analysis of FACTS system
ABSTRACT This paper puts forward a new methodology for the small signal stability analysis of power systems with FACTS devices. The analytical basis of the method is the Poincare map theory and automatic differentiation technique which offers an effective means to easily extend the conventional time domain digital simulation software to have the function of eigenvalue analysis. The Jacobian of the time-varying nonlinear systems is numerically calculated via automatic differentiation with high precision. The approach can handle large-scale system with power electronic devices and sophisticated control strategies and it is always approximation-free to model the entire system. The paper demonstrates the capability of proposed method on a SVC circuit and verifies the accuracy with theoretical result.
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ABSTRACT: The paper describes a method for system-level modeling and analysis in energy processing that does not rely on equations to capture global dynamics. Instead, it acts directly on component-level (micro) models, and thus avoids additional modeling assumptions that are often invoked on the system level to generate an explicit model. The equation-free framework is capable of directly answering key analytical questions about system dynamics, such as steady states, stability and bifurcations. The procedure is illustrated on a switched power electronic dc/dc converter.Power Symposium, 2007. NAPS '07. 39th North American; 01/2007