| Nowadays, improving the energy structure, developing the new energy and raising the power quality has drawn more and more attentions in the power source industry in our country. The grid connected converter is the core of the new energy system, and high voltage an high power in the grid connected converter is needed, so the multi-level can satisfy the requirement.This thesis design the topology of the grid connected converter with the diode clamped three level converter, and design the main circuit of the three level, introduce the space vector PWM which is achieved by the DSP and FPGA. The thesis use the (g,h) coordinate which is different from the other space vector PWM. The (g,h) coordinate is easier and faster, DSP can solve the control and the SVPWM,FPGA can guarantee the real time control and the synchronous driving signal, they can make the control more precise and reliable.This thesis do some grid connected theory analysis, analysis the grid connected model of the three level converter and design double-loop control with the MATLAB simulation to prove. The thesis design the hardware of the grid connected converter, make the grid connected converter device which is controlled by the DSP and FPGA, and do some experiments of the grid connected. |
