Prototyping of photovoltaic grid-tie inverter with active and reactive power injection

This paper presents the implementation of an experimental bench containing a single-phase grid-tie inverter with DC source using a Digital Signal Controller development board and a three-phase inverter shield. This is part of a study involving the prototyping of a complete photovoltaic systems. The study outlines indirect active and reactive power injection using a zero crossing detection (ZCD) method to master the synchronization of the generated voltage from the inverter and the power grid. The measurement board is used to gather the grid information such as phase shift and the amplitude of the grid voltage for the synchronization. The diagram shown in this paper describes the different parts of the experimental bench from the DC source to the grid line passing by different boards and components. The program is coded in C language and flashed to the Texas Instruments F28069M development board. The experimental results validate previous simulation results done using Matlab. This topic is part of a large study to achieve the laboratory's strategy which aims to study and build micro power plants [1], [2] for the production of electrical energy based on wind and photovoltaic energy to response to the Algerian government plan in renewable energy.