TY - GEN
T1 - Low switching frequency active harmonic elimination in multilevel converters with unequal DC voltages
AU - Du, Zhong
AU - Tolbert, Leon M.
AU - Chiasson, John N.
AU - Li, Hui
PY - 2005
Y1 - 2005
N2 - This paper presents an active harmonic elimination modulation control method for the cascaded H-bridges multilevel converter when supplied by unequal DC sources. First, the multilevel converter is decoupled into individual unipolar converters, and the low order harmonics (such as the 5th, 7th, 11th, and 13th) are eliminated by using resultant theory while at the same time the minimum specified harmonic distortion (HD) of a combination of unipolar converters for multilevel converter control is found. Next, the switching angle sets corresponding to the minimum harmonic distortion are used as initial guesses with the Newton climbing method to eliminate the specified higher order harmonics. If the solutions are not available for some modulation indices, the unipolar switching scheme is used to eliminate high order harmonics and the active harmonic elimination method is used to eliminate low order harmonics. This method has lower switching frequency than that of the previously proposed active harmonic elimination method.
AB - This paper presents an active harmonic elimination modulation control method for the cascaded H-bridges multilevel converter when supplied by unequal DC sources. First, the multilevel converter is decoupled into individual unipolar converters, and the low order harmonics (such as the 5th, 7th, 11th, and 13th) are eliminated by using resultant theory while at the same time the minimum specified harmonic distortion (HD) of a combination of unipolar converters for multilevel converter control is found. Next, the switching angle sets corresponding to the minimum harmonic distortion are used as initial guesses with the Newton climbing method to eliminate the specified higher order harmonics. If the solutions are not available for some modulation indices, the unipolar switching scheme is used to eliminate high order harmonics and the active harmonic elimination method is used to eliminate low order harmonics. This method has lower switching frequency than that of the previously proposed active harmonic elimination method.
KW - Harmonic elimination
KW - Multilevel converter
UR - http://www.scopus.com/inward/record.url?scp=33745908282&partnerID=8YFLogxK
U2 - 10.1109/IAS.2005.1518297
DO - 10.1109/IAS.2005.1518297
M3 - Conference contribution
AN - SCOPUS:33745908282
SN - 0780392086
SN - 9780780392083
T3 - Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)
SP - 92
EP - 98
BT - Conference Record of the 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting
T2 - 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting
Y2 - 2 October 2005 through 6 October 2005
ER -