Power System Simulation by Phase Coordinate Method

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  • 相座標法による電力系統シミュレーション法
  • ソウ ザヒョウホウ ニヨル デンリョク ケイトウ シミュレーションホウ

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Abstract

This paper presents a new method of simulation for unsymmetrical faults in power system. The new method is based on the phase coordinate method. The symmetrical component method has been used traditionally for unbalanced faults in power system. This is mainly because the synchronous generators can be easily treated by the method. However, when analyzing a system that has elements with unsymmetrical impedance, the symmetrical component method can not be used. In such cases, the simulations can be easily executed by using the phase coordinate method. However, there are few papers that present detailed procedures of simulation based on the phase coordinate method. This paper, at first, presents phase coordinate models of the elements in power system; i.e., synchronous generator, transmission line, transformer and load. Next it presents a method of power flow calculation of a power system including elements with unsymmetrical impedances. Finally it presents detailed procedures of simulations based on the phase coordinate models derived.

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