voltage fluctuation is one of the important types of power quality aspects originated from heavy fluctuating loads. this phenomenon can influence the behavior of induction motors, produce excessive vibration and increase the ohmic losses. in this paper a simplified model to evaluate the electrical characteristics of three phase induction motors under voltage fluctuation conditions will be prese...

in this paper, sufficient conditions are proposed to investigate the robust stability of arbitrary switched linear systems with uncertain parameters belongs to the known intervals. in addition, a method is then established to determine the maximum intervals of parameters' variations which guarantee robust exponential stability of uncertain switched linear systems under arbitrary switching. in t...

Integration of power electronic switching systems into electric utility systems and electric motion systems creates the possibility of new instabilities in these systems. The analysis of these systems is a challenging problem since it is difficult to develop a high fidelity analytical model that captures the complex dynamical interaction of these systems. Averaging models often do not provide t...

This paper deals with a new method based on neural networks for eigenvalue predictions of critical stability modes of power systems. Our special interest is focused on inter-area oscillations in the European interconnected power system. The existing methods for eigenvalue computations are time-consuming and require the entire system model that includes an extensive number of states.

| This paper presents a new general method for computing the diierent speciic power system small signal stability conditions. The conditions include the points of minimum and maximum damping of oscillations, saddle node and Hopf bifurcations, and load ow feasibility boundaries. All these characteristic points are located by optimizing an eigenvalue objective function along the rays speciied in ...

I. I N T R O D U C T I O N Modern power grid:; are becoming more and more stressed with the load demands increasing rapidly. The voltage collapses which occurred recently have again drawn much attention to the issue of stability security margins in power systems [I]. The small signal stability margins are highly dependent upon such system factors as load flow feasibility boundaries, minimum and...

Abstract— This article investigates the performance of the generator excitation loop equipped with a PID controlled AVR system, and of the dam automaton consisting of a PID controlled water flow regulation system in the southern interconnected grid (SIG) of the Cameroonian power system, when subjected to small perturbations, using linearized state-space models of the power plant. A fifth order ...

A new small signal stability analysis method is presented. The method is based on the computation of the transition matrix over a specified time interval that normally corresponds to one cycle operation of the system. The method is applicable to any system and it is especially suited to switching systems with or without nonlinear elements. A examples of the method application is presented. The ...