Line-to-line Voltage Space Vector Modulation for Neutral-point Clamped Multi-level Converter with DC-link Capacitor Voltage Balancing Using Redundant Vectors

2014 ◽  
Vol 42 (10) ◽  
pp. 1070-1086
Author(s):  
Omar Bouhali ◽  
Bruno Francois ◽  
Nassim Rizoug
Keyword(s):  
Neutral Point ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Voltage Space Vector ◽  
Line Voltage ◽  
Voltage Balancing ◽  
Capacitor Voltage ◽  
Multi Level ◽  
Vector Modulation ◽  
Level Converter

scholarly journals A Generic Multi-Level SVM Scheme Based on Two-Level SVM for n-Level Converters

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2143
Author(s):  
Chen Wei ◽  
Xibo Yuan ◽  
Yonglei Zhang ◽  
Xiaojie Wu
Keyword(s):  
Pulse Width Modulation ◽  
Industrial Applications ◽  
Space Vector Modulation ◽  
Computation Complexity ◽  
Space Vector ◽  
N Level ◽  
Voltage Vector ◽  
Multi Level ◽  
Vector Modulation ◽  
Level Converter

Multi-level converters are widely used in various industrial applications. Among various space vector modulation (SVM) schemes, the multi-level SVM scheme based on two-level space vector pulse width modulation (SVPWM) is recognised as a simplified multi-level SVM scheme, which can reduce the computation complexity. However, this scheme is still complicated when the number of the voltage levels is large. This paper proposes a modified SVM scheme that can further simplify the multi-level SVM scheme based on two-level SVPWM. The proposed SVM scheme can directly determine the two-level hexagon where the reference voltage vector is located by calculating a simple formula. The whole modulation process can be completed by only three steps. Meanwhile, the proposed method is generic for any n-level converter without adding much calculation, which greatly simplifies the modulation process. Experimental results have been provided, which verify the effectiveness and generality of the proposed SVM scheme for two types of multi-level converters.

An Improved VSVPWM Strategy of Considering Neutral-Point Potential Balancing in Three-Level NPC Converter

2014 ◽  
Vol 496-500 ◽  
pp. 1079-1083
Author(s):  
Shi Weng Gui ◽  
Lu Wang ◽  
Sheng Hua Huang
Keyword(s):  
Neutral Point ◽  
Virtual Space ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Multilevel Converters ◽  
Control Approach ◽  
Research Fields ◽  
Point Potential ◽  
Vector Modulation ◽  
Level Converter

Neutral-point (NP)-clamped three-level converter is a widely used topology in the research fields of the multilevel converters, which suffers from the NP voltage drift as its main technical drawback. In theory, it is based on the fact that the virtual space vector modulation approach could completely control the balance of neutral-point potential, so this paper introduces a improved control strategy of neutral-point potential balancing in three-level converter, which combines the space vector modulation approach based on virtual vectors with the algorithm of modifying small vectors pairs distribution time accurately. Relative to the traditional proposed algorithm of setting voltage tolerance range to modify small vectors pairs distribution time,the performance of algorithm of capacitor charge balancing is better and its accuracy of control is more precise. The feasibility of the proposed control approach has been verified via experiment results.

Sign in / Sign up

Export Citation Format

Share Document