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This paper developed the theory of decoupled control of active and reactive power for a doubly fed induction generator and discussed the methods to determine the stator flux and the rotor position. A closed-loop observer of stator flux is constructed, to which the deviations of the observed and measured rotor current were fed back. The observer constructed in the paper can eliminate the original errors...
Quantitatively evaluating the service quality of power supply is significant in electricity market, and it is beneficial to improve service quality. This paper proposed an applicable method to assess service quality with four grades based on fuzzy set theory. Considering the attributes and main factors that influence service quality, a two-level evaluation index system was set up. It is effective...
The parameter identification based on Hopfield neural network (HNN) was applied to a static excitation system. The applicable algorithm of the identification method was given in detail. Nine-parameter excitation system was studied. The HNN of twenty neurons were designed in order to identify these parameters. Finally model validation was performed. Numerical simulation results testify that this method...
This paper introduces an electric power fault recorder integrated analyzing & application system, which interconnects digital fault recorders of several substations and power houses that are widespread in Jiangxi province of China and has the fault information gathered, processed, transmitted, shared and utilized automatically and effectively. A method based on the Newton iterative algorithm for...
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