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This work develops an under-frequency preventive control strategy for island power systems that are based on evaluating the initial one-hour-ahead operating status of the system and a real-time correction method. The developed preventive control system evaluates initial system flexibility using a forecast of net load, it includes a low-frequency preventive control strategy to ensure stable operation...
The Penghu archipelago, located at the Taiwan Straits, offers a great opportunity for developing large-scale offshore wind farm. However, the Penghu system represents a weak-grid characteristic, and the reactive power produced by the 59-km submarine cable connecting Taiwan and Penghu is high, which brings a severe challenge on the wind power integration. Therefore, in the initial planning phase, it...
In recent years, the equity ownership structure of the listed company has drawn the attention of the world. The paper introduces the nonfinancial indexes, for example equity ownership structure, to improve the financial early-warning study. Firstly, we have chosen 60 agricultural listed companies as the object of study. Secondly, we use the factor analysis method and SPSS15.0 software to establish...
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