The Design Of Pv Inverter Measurement And Control System

Today, the more and more countrys are committed to the research of sustainable development strategy. Base on the advantage of solar energy, we all make major efforts in research and development of solar photovoltaic systems. The PV grid-connected system is much more convenient to take most people's eyes. The PV inverter system is the key of the PV system, it decide performance of PV. In the environment that the rapid development of PV technolog in China, we are indepth study and research Photovoltaic(PV) inverter, and propose a set of PV inverter control system for the feasibility of the program.The paper does some reaserch on topology and realization of PV inverter system. By standing require of the PV inverter control system, and analiying the technolog of the PV inverter, the grid-connected technolog is practiced based on the Hysteresis Current Control. The practical PV inverter control system is designed for using both on grid-connected and stand-alone.The system that implement PV grid-connected controlling by adapting DSP TMS320F2808 and CPLD EPM570 which is low power consumption and high ratio of performance to price. Using the DSP advantage in calculating, it can practice the PID and Maxium Point Power Trace(MPPT) calculation easily. In the CPLD it implemented the Direct Digital Synthesis(DDS) technology. This generates Sine Wave and Triangular Wave, they can generate the SPWM signal after comparing. At the end, we simulink the Grid-connect and MPPT using MATLAB, it prove the Feasibility of the system.This method is different from the tradition that which only using the DSPs, it can get the shorter time when using in grid-connected synchronous tracking. It is also much more convenient to implement the safety control. The design is easier to reduce the development cycle. And it can run much more stable to achieve low harmonic distortion.