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Increasing numbers of wind turbine units are connected to electrical power systems, the full model of wind farms with high number of wind turbines is a high order model which isn't appropriate for online system security analysis and stability margin computation. This paper presents a new way of aggregation of doubly fed induction generators(DFIGs) wind turbine units which have a four-quadrant ac-to-ac...
An improved time-domain online dynamic equivalent method is presented, which is suitable to shipboard power systems (SPS) and based on the coherency technique. It preserves the structure of the generator, excitation system and governor system, and the time-domain non-iterative algebraic operations process is used to calculate equivalent parameters. Sixth-order generator equation is used to reduce...
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