TY - GEN
T1 - An improved CPS-SPWM and unified modulation strategy for multilevel converter
AU - Zhang, Haitao
AU - Meng, Yongqing
AU - Wang, Xiuli
AU - Zou, Yuntao
AU - Wu, Xiong
AU - Liu, Chunyang
AU - Zhou, Qian
AU - Zhu, Weiping
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/12/9
Y1 - 2016/12/9
N2 - Due to the modularity, scalability and low loss compared with the traditional VSC converter, MMC based converter has raised a research hotspot in the field of direct-current transmission and direct-current distribution. Different from the direct-current transmission, the voltage level for direct-current distribution is relative low, resulting in a relative low level of the output waveforms. So the stair-case modulation, which may introduce numerous harmonic in low level, is not applicable to the direct-current distribution. To resolve this problem, we propose an improved carrier phase-shifted SPWM (ICPS-SPWM) in this paper, which is easier for digital implementation and has a better harmonic performance compared with traditional one. Besides, based on the improved carrier phase-shifted SPWM (ICPS-SPWM), a unified modulation is proposed, which can switch between ICPS-SPWM and space-vector PWM modulation (SVPWM) for multilevel easily and flexibly. In the end, simulation based on Matlab is presented to validate the effectiveness of the proposed modulation strategy.
AB - Due to the modularity, scalability and low loss compared with the traditional VSC converter, MMC based converter has raised a research hotspot in the field of direct-current transmission and direct-current distribution. Different from the direct-current transmission, the voltage level for direct-current distribution is relative low, resulting in a relative low level of the output waveforms. So the stair-case modulation, which may introduce numerous harmonic in low level, is not applicable to the direct-current distribution. To resolve this problem, we propose an improved carrier phase-shifted SPWM (ICPS-SPWM) in this paper, which is easier for digital implementation and has a better harmonic performance compared with traditional one. Besides, based on the improved carrier phase-shifted SPWM (ICPS-SPWM), a unified modulation is proposed, which can switch between ICPS-SPWM and space-vector PWM modulation (SVPWM) for multilevel easily and flexibly. In the end, simulation based on Matlab is presented to validate the effectiveness of the proposed modulation strategy.
KW - direct-current distribution system
KW - improved carrier phase-shifted SPWM (ICPS-SPWM)
KW - modular multilevel converter (MMC)
KW - space-vector PWM modulation (SVPWM)
KW - unified modulation
UR - https://www.scopus.com/pages/publications/85009961773
U2 - 10.1109/APPEEC.2016.7779705
DO - 10.1109/APPEEC.2016.7779705
M3 - 会议稿件
AN - SCOPUS:85009961773
T3 - Asia-Pacific Power and Energy Engineering Conference, APPEEC
SP - 1306
EP - 1310
BT - IEEE PES APPEEC 2016 - 2016 IEEE PES Asia Pacific Power and Energy Engineering Conference
PB - IEEE Computer Society
T2 - 2016 IEEE PES Asia Pacific Power and Energy Engineering Conference, APPEEC 2016
Y2 - 25 October 2016 through 28 October 2016
ER -