A New Deadbeat Control Of A Three-level Grid-connected Inverter

Solar grid-connected technology is an important aspect of application of Solar energy technology. The choice of grid-connected control strategy is of great significiency to improve the photovoltaic power generation efficiency and reduce costs. Based on three-level inverter and SVPWM modulation strategy, this paper adapted the deadbeat control strategy to achieve the generation power to grid. This strategy had been simulated to verify its feasibility in grid-connected system. Then this dissection desighed the software program, achieved the open-loop debugging in a set of TMS320LF2812 DSP-based three-phase grid-connected inverter prototype. The major study includes several aspects:Firstly, after the analysis of the three-level inverter operating principle and SVPWM modulation strategy , this paper proposed a new deadbeat control algorithm to achieve the control of grid-connected.Secondly, this paper designed the entire three-level inverter grid-connected system and carry out the simulation and verification.Then, the open-loop debugging in a set of three-phase grid-connected inverter have been achieved, to lay the foundation for grid-debug, base on the SVPWM modulation strategy.Finally, this paper completed the whole grid control system software design, and achieved DSP control procedures.The application of the new deadbeat control algorithm in inverter grid-connected is analyzed and simulated. The steady-state response and dynamic response of inverter are inproved, and the power factor can be 1. The experimental results show that the analysis and design is reasonable.