Reciprocity-transposition-based sinusoidal pulsewidth modulation for diode-clamped multilevel converters
Tóm tắt
Modulation strategies for multilevel inverters have typically focused on synthesizing a desired set of three phase sinusoidal voltage waveforms using a fixed number of DC voltage levels. This results in the average current injection and hence the net power drawn from the multiple DC bus terminals to be unmatched and time varying. Subsequently, the DC-bus voltages are unregulated, requiring corrective control action to incorporated. In this paper, the principle of reciprocity transposition in introduced as a means for modeling the DC-bus current injection simultaneously as the modulation strategy is formulated. Furthermore, a new sinusoidal pulsewidth-modulation strategy that features constant and controllable current injection at the DC-bus terminals while maintaining output voltage waveform quality is introduced. The proposed strategy is general enough to be applied to converters with an even number of levels and an odd number of levels. Analytical results comparing the performance of the proposed modulator with a conventional multiple carrier modulator are presented for example multilevel converters with four and five levels. Computer simulation results verifying the analytical results are presented for a four-level converter.
Từ khóa
#Space vector pulse width modulation #Pulse modulation #Semiconductor diodes #Pulse width modulation converters #Voltage control #Stress #Pulse inverters #Pulse width modulation inverters #Phase modulation #Performance analysisTài liệu tham khảo
10.1109/PEDES.1998.1329990
biswas, 1996, stepped wave synthesis from preprogrammed pwm inverters with a common dc-dc converter supply, Proc IEEE PEDES 96, 161
10.1109/IAS.2000.883115
10.1109/PESC.1990.131211
10.1109/PESC.1998.701896
10.1109/28.913731
10.1109/IAS.2000.883129
10.1109/PESC.1996.548706
10.1109/28.740843
10.1109/28.833778
10.1109/PESC.1988.18125
lai, 1995, multilevel converters—a new breed of power converters, Conf Rec IEEE-IAS Annu Meeting, 2348
hill, 1999, performance of medium voltage multilevel inverters, Conf Rec IEEE-IAS Annu Meeting, 1186
10.1109/IAS.1999.799213
manjrekar, 1999, Topologies analysis controls and generalization in H-Bridge multilevel power conversion
10.1109/PCICON.1995.523958
10.1109/61.584411
10.1109/IAS.1996.560201
10.1109/63.712325
10.1109/PESC.1999.785645
10.1109/63.788501
10.1109/63.838098
10.1109/28.913728
10.1109/PESC.1995.474959
2001, PSIM Users Manual Version 5 0
10.1109/PESC.1980.7089455