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Wind power plants in Czech Republic

Kurka O., Leuchter J.

Maszyny Elektryczne : zeszyty problemowe

2010

Nr 87

51-57

The paper deals with history, state-of-the-art and future development of wind power plants (WPP) in Czech Republic. First units of this art occurred in CR in early fortieth of the last century namely in isolated places in the countryside and in mountains, where the electricity network has not yet been established. The boom of WPP started especially in times, when Europe and whole the world were looking for renewable sources of electrical energy. First powerful units in CR connected to the network were installed in the half of ninetieths. The gradual growth of number, types, power output and electrical energy produced by WPP in CR is briefly described. Some problems and difficulties going along with the building-up of WPP are discussed. The corresponding attention is devoted to the electrical part of WPP with regard to types of suitable generators and concepts of WPP arrangement with respect to their cooperation with electrical network.

On Borel classes of sets of Frechet subdifferentiability

Kurka O.

Bulletin of the Polish Academy of Sciences. Mathematics

2007

Vol. 55, no 3

201-209

We study possible Borel classes of sets of Frechet subdifferentiability of continuous functions on reflexive spaces.

The VSCF technology in mobile electrical generating sets

Kurka O., Rerucha V., Krupka Z., Leuchter J.

Zeszyty Naukowe. Elektryka / Politechnika Śląska

2001

z. 177

211-218

New generation of mobile electrical power generating sets (GS) is based on some new technologies. The VSCF (Variable Speed Constant Frequency) approach enables to control the speed in such a way that the optimum speed corresponds to the required power output in order to decrease the fuel consumption and harmful emissions. The variable voltage and frequency of the synchronous generator with permanent magnets is transformed to required constant values by means of power electronic converters. The paper presents to the formulation of the GS mathematical model and gives some results of the system simulations and measurements effected on the GS physical model.