Identification of Oscillation Characteristics Followed by White-Noise Perturbations Based on Multiple Synchronized Phasor Measurements

カテゴリ: 部門大会

論文No: 11

グループ名: 【B】平成19年電気学会電力・エネルギー部門大会講演論文集

発行日: 2007/09/12

タイトル(英語): Identification of Oscillation Characteristics Followed by White-Noise Perturbations Based on Multiple Synchronized Phasor Measurements

著者名: コムサン ホンソムバット(東京電力),多田 泰之(東京電力),三谷 康範(九州工業大学)

著者名(英語): Komsan Hongesombut(Tokyo Electric Power Co.),Yasuyuki Tada(Tokyo Electric Power Co.),Yasunori Mitani(Kyushu Institute of Technology)

キーワード: coupled vibration model|identification of oscillation characteristics|load modeling|phasor measurement unit|slow coherencywhite-noise perturbation|coupled vibration model|identification of oscillation characteristics|load modeling|phasor measurement unit|

要約(日本語): Effective assessment of the dynamic performance of the power system requires wide-area information from properly distributed phasor measurement units (PMUs). However, practically it is not necessary to place PMUs at all busses. The placement sites are limited by the available communication facilities, the cost of which may be higher than that of the PMUs. The concept of slow coherent group is used in this paper. The frequency variation of phasor in a coherent group is approximated by looking at a single phasor of a PMU installed at each slow coherent group. It is shown in this paper that when PMU location is chosen in the coherent group, there is no obvious different of PMU location in the mode identification of low frequencies. Firstly, a useful load model driven by the white-noise source is developed in MidFielder program for this studying. The proposed model is practical and is very fruitful for using in studying of power system oscillation identification. Then we apply this model with the slow coherency technique for partitioning a power system network into several groups of coherent generators including load buses. The groping information is useful for precise identification of critical weak tie-lines. We define the arrangement of PMUs as a coherent group with one randomly installed PMU and apply least-squares method for fitting into the coupled vibration model (CVM). The simulations have confirmed the validity of PMU placement in a coherent group and the effectiveness of a coupled vibration model technique to evaluate the stability of identified low frequency oscillations.

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