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SRPAK, D., ŠUMIGA, I., STIJAČIĆ, S.
SOLAR POWER PLANT „STUDENTSKI RESTORAN VARAŽDIN”
KOMUNALNA ENERGETIKA / POWER ENGINERING, 7
This article describes the main elements of solar power plant built on the roof of the student restaurant in Varaždin, particular the used grid inverters. Moreover, the way of connecting the photovoltaic cells on grid converters and user’s installation is presented. At the end of this paper there is a review of electrical energy production during first five month of operation.
ANDREJAŠIČ, T., BRECL, K., NEMAC, F., TOPIČ, M.
BIVP – ENERGY POTENCIAL AND INTEGRATION OF SOLAR POWER PLANTS IN TOWN AREAS
KOMUNALNA ENERGETIKA / POWER ENGINERING, 10
Given a high degree of solar irradiation in Slovenia, which is between 1150 and 1400 kWh/m2 on a horizontal plane, the potential for installing solar power plants is high in fragmented urban areas as sources of BIPV. The paper is based on the database of solar irradiation, depending on the location. Quantification of losses is presented due to the nonideal angle and orientation of photovoltaic generator and the effects of partial shading.
Furthermore the influence of reduction of natural convection in BIPV is presented as temperature raise and consequent decrease of annual energy yield. Finally, losses in the process of voltage conversion in the inverter and protection elements are presented.
SUKIČ, P., ŠTUMBERGER, G.
GENERATION OF REACTIVE POWER WITH SOLAR POWER PLANTS AND EXAMPLES OF IMPROPER OPERATION OF SOLAR POWER
KOMUNALNA ENERGETIKA / POWER ENGINERING, 30
The article discusses the generation of reactive power with solar power plants. Discussed is the impact of reactive power generation on the efficiency of solar inverter. Throughout the year solar power plants operate with maximum power only in short time intervals. Therefore it is possible to generate large amounts of reactive power with solar power inverters, if needed. Due to improper operation of solar power plants, anomalies in the distribution network occur. This paper presents some of these anomalies.
SRPAK, D., PAJAN, D.
THE IMPACT OF MODULE SHADING AND AZIMUTH ON SOLAR POWER PLANT ELECTRICITY PRODUCTION
KOMUNALNA ENERGETIKA / POWER ENGINERING, 30
This article shortly describes the solar power plant built on the roof of Crnec municipality building and shows the difference between actual and designed production of electricity. As example, the selected solar power plant shows the impact of module shading on electricity production and the possibility of their reduction. Moreover, the difference in production is analyzed depending on the position of the module towards the Sun in different seasons.
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.
SKORNŠEK, M., ŠTUMBERGER, G.
Algoritem for Predicting Solar Power Plant Output Power with an Artificial Neural Network
KOMUNALNA ENERGETIKA / POWER ENGINERING, 229
This work deals with the comparison of operating propertis of photovoltaic power plants. All derogations in the operation of photovoltaic power plant can be monitored with additional measurements of solar irradiation and temperature of photovoltaic cells. Based on data acquired during six months operation of discussed photovoltaic power plant an Artificial Neural Network (ANN) has been built in order to predict output power of the power plant. The ANN complements the already existing monitoring system. When the difference between the ANN predicted and measured output power of the photovoltaic power plant is too high, a detail check of the power plant components is required.
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