AN ADAPTIVE ADDITIONAL CONTROL STRATEGY FOR SUPPRESSING LOW-FREQUENCY GRID OSCILLATIONS IN DOUBLY-FED WIND FARMS

An Adaptive Additional Control Strategy for Suppressing Low-Frequency Grid Oscillations in Doubly-Fed Wind Farms

Aiming at the problem of weakly or negatively damped low-frequency oscillations caused by cross-zone transmission of electricity from large wind farms, this paper proposes a fast terminal sliding-mode additional damping controller based on the Lyapunov stability theory.By investigating the flexible power regulation characteristics and the capabilit

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Attitudes towards English in Ghana

The paper considers official and individual attitudes towards bilingualism in English and a Ghanaian language.We ask whether bilingualism in English and Ghanaian languages is a social handicap, without merit, or an important indicator of ethnic identity.Ghana has about 50 non-mutually intelligible languages, yet there are Goal Stick bag no statisti

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