1. © Imperial College LondonPage 1 A voltage controller design and it’s hardware implementation for a DC/AC power converter Xinxin Wang Control and Power Group

2. © Imperial College LondonPage 2 Outline 1.Background 2.A voltage controller design 3.Hardware implementation 4.Conclusion

3. © Imperial College LondonPage 3 1. Background The distributed generation (DG) is developing rapidly. Power converters, such as IGBTs, are used as the interfaces between DGs and local loads. H ∞ repetitive control theory is used to design a controller for the DC/AC power converter.

4. © Imperial College LondonPage 4 2. A voltage controller design Two-loop control system Formulation of the H-infinity problem Simulation results

5. © Imperial College LondonPage 5 Model of the system Two-loop control system

6. © Imperial College LondonPage 6 Repetitive control system Formulation of H∞ problem

7. © Imperial College LondonPage 7 Simulation results Tracking error

8. © Imperial College LondonPage 8 3. Hardware implementation Introduction of the two DSPs. The controller structure with two DSPs. Parallel communication between the two DSPs. Hardware introduction.

9. © Imperial College LondonPage 9 Introduction of the two DSPs Two digital signal processors (DSPs) from TI TM, a fixed-point DSP LF2407A and a high speed floating- point DSP C6713, are used. The voltage controller is implemented by C6713. The LF2407A is used to implement SVPWM, AD conversion, protection and transmit the data to 6713.

10. © Imperial College LondonPage 10 The controller structure with two DSPs.

11. © Imperial College LondonPage 11 Parallel communication between the two DSPs External memory interface (EMIF) of LF2407A and host port interface (HPI) of C6713 are used to do the parallel communication between two DSPs. A printed circuit board (PCB) is made.

12. © Imperial College LondonPage 12 Hardware introduction

13. © Imperial College LondonPage 13 4. Conclusion What I have done Controller design Parallel communication AD conversion SVPWM protection What I will do voltage controller implementation

14. © Imperial College LondonPage 14