Abstract:
This paper applies nearest level control (NLC) to the modular multilevel converter (MMC). Since there are a number of submodules (SMs) in high-voltage applications of MMC...Show MoreMetadata
Abstract:
This paper applies nearest level control (NLC) to the modular multilevel converter (MMC). Since there are a number of submodules (SMs) in high-voltage applications of MMC and all SM voltages are required to be measured and sorted, if the uniform sampling frequency is not high enough, the SM will not be triggered as quickly as possible. Thus, the converter-output voltage levels and voltage harmonics will be affected. A method to systematically analyze the voltage harmonics is presented, considering the uniform sampling frequency. In order to select a proper sampling frequency, two critical values, which significantly influence the output voltage levels and voltage total harmonic distortions, are calculated. Simulation results based on PSCAD/EMTDC proved the validity of the proposed modulation scheme and the importance of a properly selected sampling frequency.
Published in: IEEE Transactions on Power Delivery ( Volume: 26, Issue: 1, January 2011)
Department of Electrical Engineering, University of Zhejiang, Hangzhou, China
Qingrui Tu (S'10) was born in Gansu, China, in November 1985. He received the B.S. degree in electrical engineering from Zhejiang University, Hangzhou, China, in 2008, where he is currently pursuing the Ph.D. degree in electrical engineering.
His main field of interest includes the application of VSC-HVDC and flexible ac transmission systems for renewable energy.
Qingrui Tu (S'10) was born in Gansu, China, in November 1985. He received the B.S. degree in electrical engineering from Zhejiang University, Hangzhou, China, in 2008, where he is currently pursuing the Ph.D. degree in electrical engineering.
His main field of interest includes the application of VSC-HVDC and flexible ac transmission systems for renewable energy.View more
Department of Electrical Engineering, University of Zhejiang, Hangzhou, China
Zheng Xu (M'00) was born in Zhejiang, China, in September 1962. He received the B.S., M.S., and Ph.D. degrees in electrical engineering from Zhejiang University, Hangzhou, China, in 1983, 1986, and 1993, respectively.
He has been with the Department of Electrical Engineering, Zhejiang University, since 1986 and has been a Professor there since 1998. His research areas include HVDC, flexible ac transmission systems, power h...Show More
Zheng Xu (M'00) was born in Zhejiang, China, in September 1962. He received the B.S., M.S., and Ph.D. degrees in electrical engineering from Zhejiang University, Hangzhou, China, in 1983, 1986, and 1993, respectively.
He has been with the Department of Electrical Engineering, Zhejiang University, since 1986 and has been a Professor there since 1998. His research areas include HVDC, flexible ac transmission systems, power h...View more
Contents Department of Electrical Engineering, University of Zhejiang, Hangzhou, China
Qingrui Tu (S'10) was born in Gansu, China, in November 1985. He received the B.S. degree in electrical engineering from Zhejiang University, Hangzhou, China, in 2008, where he is currently pursuing the Ph.D. degree in electrical engineering.
His main field of interest includes the application of VSC-HVDC and flexible ac transmission systems for renewable energy.
Qingrui Tu (S'10) was born in Gansu, China, in November 1985. He received the B.S. degree in electrical engineering from Zhejiang University, Hangzhou, China, in 2008, where he is currently pursuing the Ph.D. degree in electrical engineering.
His main field of interest includes the application of VSC-HVDC and flexible ac transmission systems for renewable energy.View more
Department of Electrical Engineering, University of Zhejiang, Hangzhou, China
Zheng Xu (M'00) was born in Zhejiang, China, in September 1962. He received the B.S., M.S., and Ph.D. degrees in electrical engineering from Zhejiang University, Hangzhou, China, in 1983, 1986, and 1993, respectively.
He has been with the Department of Electrical Engineering, Zhejiang University, since 1986 and has been a Professor there since 1998. His research areas include HVDC, flexible ac transmission systems, power harmonics, and power quality.
Zheng Xu (M'00) was born in Zhejiang, China, in September 1962. He received the B.S., M.S., and Ph.D. degrees in electrical engineering from Zhejiang University, Hangzhou, China, in 1983, 1986, and 1993, respectively.
He has been with the Department of Electrical Engineering, Zhejiang University, since 1986 and has been a Professor there since 1998. His research areas include HVDC, flexible ac transmission systems, power harmonics, and power quality.View more
