Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/653219
Title: Harmonic Elimination in Multilevel Inverters Under Unbalanced Voltages and Switching Deviation Using a New Stochastic Strategy
Authors: Hamid Reza Massrur;Taher Niknam;Mohammad Mardaneh;Amir Hossein Rajaei
subject: flying capacitor voltages|multilevel inverters|multilevel flying capacitor inverter|self-adaptive mutation tactic|switching deviation|unbalanced voltages|total harmonic distortion|gate-drive circuits|STHD strategy|microcontrollers|modified cuckoo search algorithm|stochastic strategy|dissipative snubbers|switching angle variations|harmonic elimination|blanking time|selective harmonic elimination named stochastic THD|switching angles pattern|unbalanced capacitor voltages
Year: 2016
Publisher: IEEE
Abstract: A new approach for minimization of total harmonic distortion (THD) of a multilevel flying capacitor inverter (MFCI) based on the selective harmonic elimination named stochastic THD (STHD) strategy is proposed. In the STHD strategy, the step voltage levels of multilevel inverter are considered to be varying due to unbalanced capacitor voltages. Moreover, this paper improves modeling of harmonic elimination by considering the effects of dissipative snubbers, blanking time, gate-drive circuits, and computation time in microcontrollers on the THD calculation. Switching instants are deviated from the desired moments by regarding the mentioned effects. In the proposed strategy, the switching angle variations and unbalancing of flying capacitor voltages are evaluated by 2 m + 1 point estimate strategy. Then, the formulation is combined with new modified cuckoo search algorithm and a self-adaptive mutation tactic for the establishment of new robust algorithm for minimization of the THD. The proposed STHD strategy is capable of determining the best switching angles pattern in low switching frequency without measuring current and capacitor voltages, as well as not using any controller. The proposed strategy is applied on three MFCIs and the results show that the proposed method effectively minimizes specific harmonics with low THD.
URI: http://localhost/handle/Hannan/137779
http://localhost/handle/Hannan/653219
ISSN: 1551-3203
1941-0050
volume: 12
issue: 2
Appears in Collections:2016

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Title: Harmonic Elimination in Multilevel Inverters Under Unbalanced Voltages and Switching Deviation Using a New Stochastic Strategy
Authors: Hamid Reza Massrur;Taher Niknam;Mohammad Mardaneh;Amir Hossein Rajaei
subject: flying capacitor voltages|multilevel inverters|multilevel flying capacitor inverter|self-adaptive mutation tactic|switching deviation|unbalanced voltages|total harmonic distortion|gate-drive circuits|STHD strategy|microcontrollers|modified cuckoo search algorithm|stochastic strategy|dissipative snubbers|switching angle variations|harmonic elimination|blanking time|selective harmonic elimination named stochastic THD|switching angles pattern|unbalanced capacitor voltages
Year: 2016
Publisher: IEEE
Abstract: A new approach for minimization of total harmonic distortion (THD) of a multilevel flying capacitor inverter (MFCI) based on the selective harmonic elimination named stochastic THD (STHD) strategy is proposed. In the STHD strategy, the step voltage levels of multilevel inverter are considered to be varying due to unbalanced capacitor voltages. Moreover, this paper improves modeling of harmonic elimination by considering the effects of dissipative snubbers, blanking time, gate-drive circuits, and computation time in microcontrollers on the THD calculation. Switching instants are deviated from the desired moments by regarding the mentioned effects. In the proposed strategy, the switching angle variations and unbalancing of flying capacitor voltages are evaluated by 2 m + 1 point estimate strategy. Then, the formulation is combined with new modified cuckoo search algorithm and a self-adaptive mutation tactic for the establishment of new robust algorithm for minimization of the THD. The proposed STHD strategy is capable of determining the best switching angles pattern in low switching frequency without measuring current and capacitor voltages, as well as not using any controller. The proposed strategy is applied on three MFCIs and the results show that the proposed method effectively minimizes specific harmonics with low THD.
URI: http://localhost/handle/Hannan/137779
http://localhost/handle/Hannan/653219
ISSN: 1551-3203
1941-0050
volume: 12
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7442934.pdf1.4 MBAdobe PDFThumbnail
Preview File
Title: Harmonic Elimination in Multilevel Inverters Under Unbalanced Voltages and Switching Deviation Using a New Stochastic Strategy
Authors: Hamid Reza Massrur;Taher Niknam;Mohammad Mardaneh;Amir Hossein Rajaei
subject: flying capacitor voltages|multilevel inverters|multilevel flying capacitor inverter|self-adaptive mutation tactic|switching deviation|unbalanced voltages|total harmonic distortion|gate-drive circuits|STHD strategy|microcontrollers|modified cuckoo search algorithm|stochastic strategy|dissipative snubbers|switching angle variations|harmonic elimination|blanking time|selective harmonic elimination named stochastic THD|switching angles pattern|unbalanced capacitor voltages
Year: 2016
Publisher: IEEE
Abstract: A new approach for minimization of total harmonic distortion (THD) of a multilevel flying capacitor inverter (MFCI) based on the selective harmonic elimination named stochastic THD (STHD) strategy is proposed. In the STHD strategy, the step voltage levels of multilevel inverter are considered to be varying due to unbalanced capacitor voltages. Moreover, this paper improves modeling of harmonic elimination by considering the effects of dissipative snubbers, blanking time, gate-drive circuits, and computation time in microcontrollers on the THD calculation. Switching instants are deviated from the desired moments by regarding the mentioned effects. In the proposed strategy, the switching angle variations and unbalancing of flying capacitor voltages are evaluated by 2 m + 1 point estimate strategy. Then, the formulation is combined with new modified cuckoo search algorithm and a self-adaptive mutation tactic for the establishment of new robust algorithm for minimization of the THD. The proposed STHD strategy is capable of determining the best switching angles pattern in low switching frequency without measuring current and capacitor voltages, as well as not using any controller. The proposed strategy is applied on three MFCIs and the results show that the proposed method effectively minimizes specific harmonics with low THD.
URI: http://localhost/handle/Hannan/137779
http://localhost/handle/Hannan/653219
ISSN: 1551-3203
1941-0050
volume: 12
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7442934.pdf1.4 MBAdobe PDFThumbnail
Preview File