Title :
Equivalence of SVM and carrier-based PWM in three phase/wire/level VIENNA rectifier and unbalanced-load ability
Author :
Li, Bin ; Hang, Lijun ; Yao, Wenxi ; Lu, Zhengyu
Author_Institution :
Sch. of Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
In this paper, the analysis of Space Vector Modulation (SVM) of three phase/wire/level VIENNA rectifier is conducted, according to which the implementation of the equivalent carrier-based PWM is deduced theoretically within each separated sector in the diagram of vectors. The voltage balancing ability of DC-link neutral point, which depends on the uneven distribution of short vectors, is analyzed as well. An adaptive and robust controller to balance the output voltage under the unbalanced load limit for different modulation index is proposed. Furthermore, the maximum of unbalanced load is deduced versus the modulation index m. An experimental prototype of 2.5kW was built to verify the effectiveness of the theoretical analysis. Finally, the tested unbalanced limit of outputs for the experimental platform was given under different modulation index.
Keywords :
PWM rectifiers; adaptive control; modulation; robust control; vectors; DC-link neutral point; SVM equivalence; adaptive controller; carrier-based PWM equivalence; level VIENNA rectifier; modulation index; power 2.5 kW; robust controller; short vector uneven distribution; space vector modulation analysis; three phase VIENNA rectifier; unbalanced-load ability; vector diagram; voltage balancing ability; wire VIENNA rectifier; Rectifiers; Switches;
Conference_Titel :
Industrial Electronics (ISIE), 2012 IEEE International Symposium on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4673-0159-6
Electronic_ISBN :
2163-5137
DOI :
10.1109/ISIE.2012.6237106