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Based on the wavelet transform and artificial neuron network, a new method is presented to determine parameters of synchronous machine from sudden line-to-line short-circuit test. An appropriate wavelet function is chosen to analyze the sudden line-to-line short-circuit transient current and the DC and fundamental component of the transient short-circuit currents are obtained by the wavelet transform...
The switching transient course of IGBT, which is its basic dynamic performance index and one of the main cause of inner loop current in a paralleled source system, determines the source system well-running and stability. In this paper, an amended and extended IGBT switching transient course is raised based on an existing model, as well as a flexible modeling rule with corresponding parameters fitting...
Multi-phase synchronous machines with AC and DC outputs are being used in independent power system ever-increasingly. Several independent Y-connected windings are equipped on the stator of the machine, one of which delivers AC power, and the others named as DC windings are connected to the bridge rectifier. As there are two windings in this kind of generator providing AC and DC currents respectively,...
Double-winding AC-DC generators are used in self-contained electrical systems. A 3-phase winding and a 12 phase winding set are installed on the stator of the machine, the former delivering AC power and the latter supplying DC power through a bridge rectifier. In this paper, mathematical models are set up in d-q coordinates and the corresponding electromagnetic parameters are proposed for studying...
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