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The order reduction for special modes of large power systems under single operating condition is presented in this paper. The system matrix is rearranged by eigenvalue sensitivities, and reduced in dimension with only the strong correlation generators reserved, the computation of the reduced system matrix is carried out by the improved rayleigh quotient inverse iteration. To improve the efficiency...
In this paper, when the stator fault, the stator input voltage of motor are deduced, based on the mathematical model of induction motor in the αβ reference frame. Establish and simulate the stator fault three-phase induction motor model to get the stator fault currents. Using filters to remove the 50 Hz fundamental component of stator fault currents, then do the spectral analysis of these currents...
Squirrel-cage asynchronous motors are modeled and analyzed by combining the basic modules and S-function from Matlab/Simulink. And the algorithm of solving stator current and flux are improved to increase the accuracy of model. The simulation results of the stator current, flux and rotor speed torque under the condition of increasing load are given. The simulations demonstrate that the model built...
Based on mathematical analysis, the dynamic mathematical model of asynchronous motor with iron loss and the model without iron loss are deduced. Using the basic modules and S-function of MATLAB/SIMULINK, the simulation models of three phase asynchronous motor with iron loss and without iron loss are built. Compare the two models with the results of simulations, and give the influence on stator current,...
A single neuron controller including flexible AC transmission systems (FACTS) devices in power system is introduced. SVC and TCSC are plugged into the network as additional modules for small perturbation studies. The single neuron model is employed to form the composite model for improving the electro-mechanical mode of power system under probabilistic condition, and genetic algorithm is used to optimize...
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