電力系統の予防制御のための定態安定限界の高速探索　　―モード結合法の応用―

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  • High Speed Searching of Steady State Stability Limit for Preventive Control of Power System -Application of Mode Coupling Method-
  • デンリョク ケイトウ ノ ヨボウ セイギョ ノ タメ ノ テイタイ アンテイ ゲンカイ ノ コウソク タンサク モード ケツゴウホウ ノ オウヨウ
  • —Application of Mode Coupling Method—
  • —モード結合法の応用—

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In this paper, high speed searching of stability limit output for preventive control of a power system is proposed. It is necessary to understand a range of stability limits of a generator in various possible operating conditions to execute preventive control. The possibility of an accident increases as a power system becomes large. Therefore, it takes a certain amount of time to conduct a stability analysis. Then, we propose three kinds of searching techniques (straight line method, quadratic curve method and spline curve method) to search for a stability limit in the power system at high speed, and the most effective method is identified through comparison of these methods. In this case, the mode coupling method (MC method) was used for the presumption of the eigenvalue that evaluated stability in the steady state stability analysis of the power system. Moreover, the MC method used this time selects major modes for that we pay attention and highly related modes. Next, these two or more selected modes are coupled and new eigenvalues of the coupled matrix are calculated. The size of the coupled matrix is very small. As a result, it found to be an effective method in which non-liner estimation of the eigenvalue is possible. Also, it became possible to search for the limit of the output in high accuracy by setting the estimated error as the situation demands.

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