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    A modelling case study of an island mode solar power plant
    (Institute of Electrical and Electronics Engineers Inc., 2015) Kabalci, Ersan; Gorgun, Alper; Kabalci, Yasin; Gokkus, Goksel
    The solar panel model is designed according to equation of a solar cell, and all the required parameters such as open circuit voltage, short circuit current etc are considered in order to modify the output power regarding to a commercial photovoltaic (PV) panel. The dc-dc conversion is performed with a buck converter where the optimal duty cycle is dynamically updated by a proportional-integral (PI) controlled generator. The settling time and dc voltage ripples are minimized to increase the efficiency of the dc-dc converter. On the other hand, the single-phase inverter is constructed with an H-bridge that is the most basic multilevel topology known ever. The main intention during the inverter operation was decreasing the total harmonic distortion (THD) ratios as much as possible. Therefore, the modulation scheme is particularly applied to decrease THD by eliminating side band harmonics. The line voltage is properly fixed to 220V/50Hz that is common in northern and central Europe. The THD ratio of the line voltage is measured at 0.03%, while the THD of the current is 0.82%. The power factor of the entire system is measured as 0.99 considering the 8.1° phase displacement between current and voltage waveforms. The analysis results verify the efficiency of the proposed solar power plant and its components.; This paper deals with efficiency analysis of a solar power plant that is considered to be installed in island mode with 2 kWp rated power. The test bed designed in Simulink © 2015 IEEE.
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    A Modelling Case Study of an Island Mode Solar Power Plant
    (IEEE, 2015) Kabalci, Ersan; Kabalci, Yasin; Gorgun, Alper; Gokkus, Goksel
    This paper deals with efficiency analysis of a solar power plant that is considered to be installed in island mode with 2 kWp rated power. The test bed designed in Simulink c consists of solar panel, buck converter, and H-bridge inverter models all based to analytical concepts. The solar panel model is designed according to equation of a solar cell, and all the required parameters such as open circuit voltage, short circuit current etc are considered in order to modify the output power regarding to a commercial photovoltaic (PV) panel. The dc-dc conversion is performed with a buck converter where the optimal duty cycle is dynamically updated by a proportional-integral (PI) controlled generator. The settling time and dc voltage ripples are minimized to increase the efficiency of the dc-dc converter. On the other hand, the single-phase inverter is constructed with an H-bridge that is the most basic multilevel topology known ever. The main intention during the inverter operation was decreasing the total harmonic distortion (THD) ratios as much as possible. Therefore, the modulation scheme is particularly applied to decrease THD by eliminating side band harmonics. The line voltage is properly fixed to 220V/50Hz that is common in northern and central Europe. The THD ratio of the line voltage is measured at 0.03%, while the THD of the current is 0.82%. The power factor of the entire system is measured as 0.99 considering the 8.1 phase displacement between current and voltage waveforms. The analysis results verify the efficiency of the proposed solar power plant and its components.
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    Design and implementation of a renewable energy monitoring system
    (2013) Kabalci, Ersan; Gorgun, Alper; Kabalci, Yasin
    This paper introduces an instant monitoring infrastructure of a renewable energy generation system that is constituted with a wind turbine and solar panel arrays. There an uncontrolled six-pulse rectifier converts ac output voltages of wind turbine to dc. The hybrid system of renewable energy sources (RES) couples generated voltages of wind turbine and solar panels on a dc-bus and supplies charge voltage to the battery bank. The monitoring platform is based on current and voltage measurements of each renewable source. The related values are measured with the developed sensing circuits and are processed by an 18F4450 microcontroller of Microchip. The processed parameters are then transmitted to a personal computer (PC) over universal serial bus (USB) to be saved in a database and to observe the system instantly. The observing software that is coded with Microsoft Visual Studio. Net platform allows system administrator to monitor generated energy and actual status of each renewable energy source at a glance. The coded visual interface of monitoring software can manage the saved data to analyze daily, weekly and monthly values of each measurement separately. © 2013 IEEE.