Implementation of Three-Phase Grid-Connected Inverter Controlled with dSPACE DS1103 Evren ISEN Kirklareli University Department of Electrical Electronics Engineering Kirklareli, TURKEY evren.isen@kirklareli.edu.tr Gurcan YANIK, A.Faruk BAKAN Yildiz Technical University Department of Electrical Engineering Istanbul, TURKEY gyanik@yildiz.edu.tr, fbakan@yildiz.edu.tr Abstract— In this paper, realization of three-phase grid- connected inverter controlled with dSPACE DS1103 control board is presented. Detailed information about power circuit, sensor board, signal isolation board and DS1103 is given in the paper. The inverter is controlled with DS1103 control board, programming the DSP via MATLAB/Simulink. Connection between the developed control algorithm in Simulink and experimental setup is made with installed DS1103 tools in Simulink. Space vector pulse width modulation technique in d- q synchronous reference frame is used to control the three- phase inverter. The transferred power to grid is 10 kW via three-phase inverter. The injected grid current has 3.59% THD value with 9 kHz switching frequency and 3 mH filter inductance. Keywords—DS1103; grid-connected inverter; space vector pulse width modulation; three-phase inverter I. INTRODUCTION Utilization of renewable energy resources are rapidly increasing in the world because of increasing carbon emission and decreasing fossil fuel sources. According to EWEA 2012 report, net electricity generating installations from gas, wind and photovoltaic are 121 GW, 97 GW and 69 GW during 2000-2012 in Europe. In this time interval, consumption of coal, nuclear and fuel oil are 13 GW, 15 GW and 17 GW, respectively. Growth of installed wind power is from 2000 to 2012 is 9.2% in total installed power capacity. Over the same period, photovoltaic power’s share of total installed power capacity increased by 7% [1]. The extracted power from wind and sun is transferred to grid or load depending on the installed system. In these systems, DC/DC, AC/DC (rectifier) and DC/AC (inverter) power converters are utilized. DC/DC converters are used as maximum power point tracker, voltage booster and battery charger/discharger in photovoltaic systems [2],[3]. AC/DC converters control the extracted power from wind turbine or regulate DC bus voltage [4]. Inverters are utilized between DC bus and grid or load depending on the system being on- grid or off-grid. Control algorithm of inverter focuses on current regulation in on-grid and voltage regulation in off- grid renewable energy systems. Control performance of inverter impacts the output energy quality. In on-grid systems, there are some restrictions for inverter performance, such as anti-islanding, output current THD value, output current frequency, grid synchronization. These restrictions are accomplished with inverter. Therefore, control of inverter is important to meet the standards, such as IEEE 1547, IEEE 519. Power electronics circuits are controlled by digital signal processors that can be programmed with several programming language. As an alternative to using programming language, dSPACE control board has been developed. This board enables to use MATLAB/Simulink for programming the DSP. In the literature, dSPACE DS1104 is used for fuzzy logic controlled three-phase photovoltaic grid-connected inverter [5] and current source inverter for PV applications [6]. In addition to PV applications, DS1103 is used to control wind based energy sources [7]. Direct voltage controlled induction motor control with DS1104, permanent magnet synchronous motor control based dSPACE DS1103 is presented in [8]-[10]. DS1103 control board is used to control Z-source inverter with fuzzy logic self-tuning PI gain controller that utilized in hybrid electric vehicle [11]. dSPACE MicroAutoBox is utilized for automobile energy management [12]. Besides the inverter control, dSPACE control platform is utilized for DC/DC converter control to provide maximum power point tracking [13]. Three-phase grid-connected inverter controlled with dSPACE DS1103 control board hardware structure is presented in this paper. The developed control boards and using of control algorithm in DS1103 are explained in detail. The obtained experimental results using this hardware are given in the paper. 10 kW power is transferred to the grid and grid current has 3.59% THD. II. DSPACE CONTROLLER BOARD DS1103 control board is used to control three-phase grid- connected inverter. The board enables to control the power circuit with MATLAB/Simulink. The developed control algorithm that includes mathematical blocks, stateflow or program coded in embedded matlab function is converted to C code, then compiled and loaded to DSP on the board via - time interface (RTI) and real-time workshop (RTW). DS1103 can be easily implemented to power electronic circuits, robot control, motor control and automotive applications. This study was supported under the grant number 110E212 by the Scientific and Technological Research Council of TURKEY (TUBITAK). 978-1-4799-1464-7/13/$31.00 ©2013 IEEE 2nd International Conference on Renewable Energy Research and Applications Madrid, Spain, 20-23 October 2013 ICRERA 2013