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RIBIČ, J., PIHLER, J., VORŠIČ, J., VORŠIČ, Ž.
MODELING TRANSFORMER IN ELECTRIC NETWORK CALCULATIONS
KOMUNALNA ENERGETIKA / POWER ENGINERING, 15
Computer aided load flow calculations and short-cicuit analyses are well known and technically soficticated software for with solutions for planing and operating are available on market. Deficiency of such software is usually lack of possibility to significantly modify elements. Three windigs transformers are mainly presented as two windings tranmsformers and sometimes lack of data is the obsticle for calculations. Article presents results of the research on how including third windings influence load flow and short-circuit calculations.

SRPAK, D.
CONNECTING WIND POWER PLANTS IN ELECTRIC POWER SYSTEM
KOMUNALNA ENERGETIKA / POWER ENGINERING, 20
This article describes the way of connections and control of nowadays wind power plants connected to fixed power network, and presents problems that are caused by wind plants because their operative instability. It is also described topology of a newer with better regulations capabilities then today commercial used grid converters. At the end of this paper there is a review of existing wind power plants in Croatia and those in construction with guidelines for improvement of system stability with high wind energy penetration.

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