Shilpi Bhattacharya, Ashoke Mondal / International Journal of New Technologies in Science and Engineering Vol. 2, Issue. 3, Sep- 2015, ISSN 2349-0780 164 Available online @ www.ijntse.com Design , Implementation and Testing of SPWM Inverter on dSPACE Platform Shilpi Bhattacharya Asst. Professor, EE Dept. RCC Institute of Information Technology Kolkata, India shilpibhatt2013@gmail.com Ashoke Mondal Associate Professor, EE Dept. RCC Institute of Information Technology Kolkata, India ashoke.mondal@gmail.com Abstract: SPV based system mostly requires an inverter to deliver ac power at the consumers end. This paper presents development of a prototype of a three-phase bridge inverter for SPV applications using dSPACE 1104 hardware Real Time interface with Matlab/Simulink software. Real time Simulation environment could be obtained through dSPACE Platform in conjunction with Matlab/Simulink. In such a system the three-phase inverter model is developed in Matlab/Simulink. A current control strategy is used to generate the PWM pulses in real time using dSPACE 1104 software hardware interface. Instantaneous voltage and current signals of the load side are fed to the control block. The real time pulses generated are then used control the power devices through proper driver circuits. The system is implemented in software and hardware interface by setting an inverter prototype and the results are presented. Keywords: dSPACE 1104, SPWM, Three-phase inverter, SPV, RT Simulation. I. INTRODUCTION Non-conventional energy sources are the only alternative energy source which requires to be harnessed to the utmost level due to diminution of fossil fuels putting entire power industry at stake. Among the non-conventional energy sources solar photo voltaic (SPV) based power generation is currently one of the prime areas in the field of renewable energy resource [1]-[5]. Solar energy being an abundant source of energy, it is by far used mostly to generate electric power to be available to the grid in grid connected systems or may even work in isolated micro grids. As these systems require an inverter to produce ac voltages the quality of power available is a matter of concern for the power industry people. Maximum power tracking from the PV unit, control strategy adopted for the inverter functioning to get lower harmonics at the output utility and subsequent filtering of the ac output are the important areas of research. The nature of output voltages obtained at the ac side terminals of the inverter is one of the main areas of concern, as it is the ac output voltage may be connected to the grid or in a standalone system may be used as power supply to various equipments. Thus the lesser the harmonic content in the voltage waveforms i.e lower the % THD improved quality of supply is ascertained [6]. As pulse width modulated inverters are the ones which can deliver better voltage and current waveforms with improved power factor. These inverters demand very fast and complex control strategies which are quite difficult to achieve. Thus faster digital controllers have taken over analog ones to achieve lesser harmonics, near sinusoidal waveforms from an inverter the researchers have been trying with various controllers to generate control pulses for driving the power semiconductor devices. Due to fast and complex switching of the power devices analog controllers based on IC’s and analog components are lesser used although they have low cost, simpler circuitry and reliability. Sophisticated high end