Estimation Method of Center of Inertia Frequency based on Multiple Synchronized Phasor Measurement Data

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  • 多地点同期計測データに基づく慣性中心周波数の推定法
  • タチテン ドウキ ケイソク データ ニ モトズク カンセイ チュウシン シュウハスウ ノ スイテイホウ

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Open access and deregulation have been introduced into Japan and some independent power producers (IPP) and power producer and suppliers (PPS) are participating in the power generation business, which is possible to makes power system dynamics more complex. To maintain power system condition under various situations, it is essential that a real time measurement system over wide area is available. Therefore we started a project to construct an original measurement system by the use of phasor measurement units (PMU) in Japan. This paper describes the estimation method of a center of inertia frequency by applying actual measurement data. The application of this method enables us to extract power system oscillations from measurement data appropriately. Moreover, the analysis of power system dynamics for power system oscillations occurring in western Japan 60Hz system is shown. These results will lead to the clarification of power system dynamics and may make it possible to realize the monitoring of power system oscillations associated with power system stability.

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