scholarly journals A Generalized Space Vector Modulation for Cascaded H-Bridge Inverters under Faulty Conditions

2021 ◽  
Vol 31 (2) ◽  
pp. 92-99
Keyword(s):  
Space Vector Modulation ◽  
Space Vector ◽  
Line Voltage ◽  
Multilevel Inverters ◽  
A Cell ◽  
New Space ◽  
Space Vectors ◽  
Modulation Control ◽  
Vector Modulation ◽  
The Impact

In this research, a new space vector modulation control algorithm is proposed to increase the reliability and the accuracy of the cascaded H-bridge multilevel inverters in case of faulty situations where one or several power cells do not function. When one or more switches of a cell are opened or shorted, that cell is considered faulty. By giving a detailed analysis on the impact of the faulty power cells on the voltage space vectors, the inapplicable voltage vectors are removed precisely. Consequently, the optimal redundant switching states are chosen such that the highest possible output voltage can be achieved. In addition, the balance of the three phases line-to-line voltage and current are maintained. The proposed algorithm is also generalized so that it can be applied to any level of H-bridge inverters. The validity of the method is verified by numerical simulations using MATLAB Simulink with an 11-level cascaded H-bridge inverter.

scholarly journals Modified Space Vector Modulation for Cascaded H-Bridge Multilevel Inverter with Open-Circuit Power Cells

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Hoang Truong ◽  
Chung Mai ◽  
Cao Nguyen ◽  
Phuong Vu
Keyword(s):  
Open Circuit ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Phase Line ◽  
Common Mode Voltage ◽  
Three Phase ◽  
New Space ◽  
Modulation Control ◽  
Vector Modulation ◽  
The Impact

In this research, a new space vector modulation control algorithm is proposed to increase the reliability of the cascaded H-bridge multilevel inverters in case of faulty situations, where one or several power cells do not function. Methods to detect faults ensure finding open-circuit module exactly, which is fast and easy to program. By giving a detailed analysis of the impact of the faulty power cells, optimal redundant level states are chosen such that highest possible output voltage can be achieved, while the balance of the three-phase line-to-line voltage is maintained and common-mode voltage is reduced. The proposed algorithm is generalized so that it can be applied to H-bridge inverters of any level. The validity of the method is verified by numerical simulations and experiment results with an 11-level cascaded H-bridge inverter.

scholarly journals A Sub-Region Based Space Vector Modulation Scheme for Dual 2-Level Inverter System

2018 ◽  
Vol 8 (6) ◽  
pp. 4902
Author(s):  
R. Palanisamy ◽  
A. Velu ◽  
K. Selvakumar ◽  
D. Karthikeyan ◽  
D. Selvabharathi ◽  
...  
Keyword(s):  
Output Voltage ◽  
Modulation Scheme ◽  
Space Vector Modulation ◽  
Switching Loss ◽  
Space Vector ◽  
Dc Voltage ◽  
Multilevel Inverters ◽  
Harmonic Content ◽  
Voltage Stress ◽  
Vector Modulation

This paper deals the implementation of 3-level output voltage using dual 2-level inverter with control of sub-region based Space Vector Modulation (SR-SVM). Switching loss and voltage stress are the most important issues in multilevel inverters, for keep away from these problems dual inverter system executed. Using this proposed system, the conventional 3-level inverter voltage vectors and switching vectors can be located. In neutral point clamped multilevel inverter, it carries more load current fluctuations due to the DC link capacitors and it requires large capacitors. Based on the sub-region SVM used to control IGBT switches placed in the dual inverter system. The proposed system improves the output voltage with reduced harmonic content with improved dc voltage utilisation. The simulation and hardware results are verified using matlab/simulink and dsPIC microcontroller.

A Flexible Space Vector Modulation Scheme for Cascaded H-Bridge Multilevel Inverters Under Failure Conditions

2021 ◽  
pp. 1-1
Author(s):  
Hongjian Lin ◽  
Mahmoud Mehrabankhomartash ◽  
Fan Yang ◽  
Maryam Saeedifard ◽  
Jiangpeng Yang ◽  
...  
Keyword(s):  
Modulation Scheme ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Multilevel Inverters ◽  
Failure Conditions ◽  
Vector Modulation
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