系統周波数の変動抑制を目的とした風力発電機群の解列制御

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  • Disconnection Control of Wind Power Generators for the Purpose of Reducing Frequency Fluctuation
  • ケイトウ シュウハスウ ノ ヘンドウ ヨクセイ オ モクテキ ト シタ フウリョク ハツデンキグン ノ カイレツ セイギョ

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This paper proposes a new approach for disconnection control of wind power generators to reduce the frequency fluctuation caused by wind power. The approach is based on the correlation between frequency and total output of wind power generators and the turbulence degrees of individual wind power generators. At a control center, frequency and all the outputs of wind power generators are monitored, and the correlation and the turbulence degrees are computed on-line. If the large variation of frequency is detected, then whether the variation comes from the wind power generators or loads is checked by using the correlation. When the wind power generators cause the frequency variation, the wind power generator with maximum turbulence degree is searched and disconnected from the power systems. This search and disconnection process is repeated until the correlation reaches the level where the frequency variation observed is not caused by the wind power generators. The effectiveness of the proposed approach was confirmed with the simulation studies of a two-area interconnected power system including a lot of wind power generators. The results show that the correlation and the turbulence degree are useful for the reduction of frequency fluctuation so as not to disconnect too many wind power generators.

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