Performance evaluation of single-phase full bridge grid-connected converter with reduced switching losses

Author(s):  
C. Puripanyavanit ◽  
P. Wannakarn ◽  
P. Sardyoung ◽  
V. Kinnares
2019 ◽  
Vol 28 (06) ◽  
pp. 1950089 ◽  
Author(s):  
V. Thiyagarajan ◽  
P. Somasundaram ◽  
K. Ramash Kumar

Multilevel inverter (MLI) has become more popular in high power, high voltage industries owing to its high quality output voltage waveform. This paper proposes a novel single phase extendable type MLI topology. The term ‘extendable’ is included since the presented topology can be extended with maximum number of dc voltage sources to synthesize larger output levels. This topology can be operated in both symmetrical and asymmetrical conditions. The major advantages of the proposed inverter topology include minimum switching components, reduced gate driver circuits, less harmonic distortion and reduced switching losses. The comparative analysis based on the number of switches, dc voltage sources and conduction switches between the proposed topology and other existing topologies is presented in this paper. The comparison results show that the proposed inverter topology requires fewer components. The performance of the proposed MLI topology has been analyzed in both symmetrical and asymmetrical conditions. The simulation model is developed using MATLAB/SIMULINK software to verify the performance of the proposed inverter topology and also the feasibility of the presented topology during the symmetrical condition has been validated experimentally.


2018 ◽  
Vol 65 (1) ◽  
pp. 363-373 ◽  
Author(s):  
Ahmed Abdelhakim ◽  
Paolo Mattavelli ◽  
Pooya Davari ◽  
Frede Blaabjerg

Author(s):  
M. S. Chye ◽  
J. A. Soo ◽  
Y. C. Tan ◽  
M. Aizuddin ◽  
S. Lee ◽  
...  

This paper presents a single-phase multilevel inverter (MLI) with simpler basic unit cells. The proposed MLI is able to operate in two modes, i.e. charge mode to charge the batteries, and inverter mode to supply AC power to load, and therefore, it is inherently suitable for photovoltaic (PV) power generation applications. The proposed MLI requires lower number of power MOSFETs and gate driver units, which will translate into higher cost saving and better system reliability. The power MOSFETs in the basic unit cells and H-bridge module are switched at near fundamental frequency, i.e. 100 Hz and 50 Hz, respectively, resulting in lower switching losses. For low total harmonic distortion (THD) operation, a deep scanning method is employed to calculate the switching angles of the MLI. The lowest THD obtained is 8.91% at modulation index of 0.82. The performance of the proposed MLI (9-level) has been simulated and evaluated experimentally. The simulation and experimental results are in good agreement and this confirms that the proposed MLI is able to produce an AC output voltage with low THD.


2007 ◽  
Vol 54 (6) ◽  
pp. 2969-2978 ◽  
Author(s):  
Carlos R. Baier ◽  
Johan I. Guzman ◽  
JosÉ R. Espinoza ◽  
Marcelo A. Perez ◽  
JosÉ R. Rodriguez

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