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A simplified fault currents analysis method considering transient of synchronous machine

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4 Author(s)
Kai, T. ; Syst. Technol. Div., Meidensha Corp., Tokyo, Japan ; Takeuchi, N. ; Funabashi, T. ; Sasaki, H.

The transient fault currents of a synchronous machine fault were mathematically analyzed by using the two-reaction theory, Clarke's components, etc. However, the methods were extremely complicated and the transient fault analysis of synchronous machine with a load was not carried out except for three-phase faults. This paper proposes a simplified fault currents analysis method considering synchronous machine transients. The method is based on the symmetrical components scheme. The advantages of the method are that the transient analysis is able to be accomplished more easily than the conventional method when the fault point is a synchronous machine terminal or a transmission line. The accuracy of the method is confirmed by comparing the analysis results with Electro-Magnetic Transient Program (EMTP) digital simulations

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Energy Conversion, IEEE Transactions on  (Volume:12 ,  Issue: 3 )