The Key Technologies Of Photovoltaic Inverter Based On PEBB

In recent years, with the power electronic building block (PEBB) technology developed rapidly, PEBB in the inverter will be more widely used, thus, study the way of setting up PEBB in converter technology is very important. The project focuses on the system used in photovoltaic inverter technology, a modular inverter technology to promote photovoltaic systems in practical applications, designed and produced a power of lOkw photovoltaic inverter test platform. The system uses TMS320F2812 produced by company as the core controller, using synchronous PI current control techniques, using space vector pulse width modulation (SVPWM) control algorithm as the system, and finally were carried out off-grid and grid inverter of the experiment.This paper describes the photovoltaic power system topology, and the main function of each part was introduced. In the analysis of three-phase grid-connected solar inverter on the basis of the overall design were the main components of the circuit parameters selected for the design. Then the control system hardware circuit design, three-phase PV inverter through the derivation of mathematical model proposed PV inverter control strategy and control algorithm, and then in the CCS environment using C programming language implementation the digital control strategy. Finally, at the prototype and experimental platform based on the experiments were carried out.Experimental results show that the inverter in the process of grid inverter has good current waveform, can run close to unity power factor, and can basically meet the requirements of the harmonic power. Which played a balanced load, to ensure safe and reliable operation of the role of the system, the basic design requirements to achieve the expected, has some theoretical and practical value.