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VOVČKO, B., VOVČKO, B., ŠTRICELJ, A., SEME, S.
MATHEMATICAL MODEL OF SOLAR CELL COMPOSED IN MATLAB/SIMULINK
KOMUNALNA ENERGETIKA / POWER ENGINERING, 30
This article presents a mathematical model of solar cell composed in Matlab/Simulink. Mathematical models of solar cell presented in the article are differ in the complexity of the structure and consequently the accuracy of the responses to the input parameters and they are named as ideal, simple, single-diode and two-diode model. In Matlab/Simulink are mathematical models of solar cell assembled with the help of terms, which describe the operation of solar cell. We compared mathematical models of solar cell with each other and we were evaluated them by comparing with the measured values of the actual solar cell.

VOVČKO, B., VOVČKO, B., ŠTRICELJ, A., SEME, S.
MATHEMATICAL MODEL OF SOLAR POWER PLANT BRESTANICA
KOMUNALNA ENERGETIKA / POWER ENGINERING, 31
This article presents a mathematical model of solar power plant composed of Matlab/Simulink. For the evaluation of simulation results of the mathematical model of the solar power plant we use the results of measurements from the actual solar power plant Termoelektrarna Brestanica d. o. o. We evaluate the results of simulation calculations and measurements of the actual plant for different days of the year. The results show good correlation between calculated and measured values of solar power, which is a good basis for further use of mathematical model of solar power for the analysis of voltage profiles of the network.

VOVČKO, B., ŠTRICELJ, A.
DIFFERENT SOLAR MODULES - COMPARISON OF THE ENERGY YIELD AND PRACTICAL OPERATION EXPERIENCE
KOMUNALNA ENERGETIKA / POWER ENGINERING, 6
The purpose of this paper is to demonstrate practical experiences and results of operations of the various solar power technologies and implementations. In this paper we present a comparison of the energy yield of thin-film amorphous and monocrystalline solar modules, for the small solar power stations (MFE) of TE Brestanica at different orientations and small angles. In the first two chapters we present data for the solar power stations MFE TEB 1-3, in the third chapter we present a comparison of the energy yield of thin-film amorphous and monocrystalline solar modules based on the analysis of operation MFE TEB 1-3. In the last chapter we present a decision and proposals for the future investors, resulting from the preliminary findings.

GAŠPARINČIĆ, J., ŠTRICELJ, A.
DEVELOPMENT OF GAS TURBINES AND ELECTRO - ENERGETICAL SYSTEM TERTIARY CONTROL
KOMUNALNA ENERGETIKA / POWER ENGINERING, 17
Nowadays gas turbines have great significance in electro-energetics. In year 1905 the Brown Boveri company erected first commercial gas plant for production of electric energy. In all states in development gas plants are mostly used for covering system reserves. At the greater disorders in electro – energetical system tertiary control has relevant role at the failure of larger blocks in system when it helps secondary control and together they remove incurred unbalance of active power. Therefore in electro – energetical system units that can cover tertiary control must be always available. Reserve of overall power must be activated in 15 minutes that can offer fast gas turbines, accumulated hydroelectric power plants and pumped storage power stations.

ŠTRICELJ, A.
HYDROPOWER PLANTS ON LOWER SAVA RIVER – SYSTEM FOR DETECTING NAVIGATION AND DRIFT-WOOD BASED ON COLOR SPACE ELIMINATION
KOMUNALNA ENERGETIKA / POWER ENGINERING, 20
This article presents a method of detecting objects on water surface using color elimination based on image eroding with morphological variable. Term color area represents a complex enlistment of color spectra distinctive for a specific observed area. System of detecting object on water surface presents initiation of different methods of processing image on water surface and is so adapted to colorful water spectrum. The method of recognition which is introduced in this article, initiates phases of image pre-processing, determining color area, suitable for this kind of system and defining color deviation with Euclidean distance. It also initiates procedure of eroding on the image. Plan of that kind of system enables robust and efficient detection of objects on water surface and gives as comparable results with systems that base above all on optimization of image contrast and edge detection.

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