Analysis and elimination of circulating current caused by dead time for a grid-connected inverter parallel system

2018 ◽  
Vol 13 (10) ◽  
pp. 1520-1527
Author(s):  
Chunwei Song ◽  
Zheng Zeng
Keyword(s):  
Dead Time ◽  
Parallel System ◽  
Circulating Current ◽  
Grid Connected Inverter

scholarly journals Independent Upper- and Lower-Arm Switching Scheme Based on Reference Current Polarity for Three-Level NPC Inverters

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5535
Author(s):  
Kangsoon Ahn ◽  
Yongseung Oh ◽  
Wonseok Oh ◽  
Kyumin Cho
Keyword(s):  
Dead Time ◽  
Operation Mode ◽  
Current Control ◽  
Neutral Point ◽  
Mode Analysis ◽  
Switching Scheme ◽  
Grid Connected Inverter ◽  
Dead Time Compensation ◽  
Current Polarity ◽  
Switching Method

This study presents a novel switching scheme for three-level neutral point clamped (NPC) inverters. The proposed switching method independently drives the upper- and lower-arm elements of the inverter based on the polarity information of the reference current. The proposed switching scheme does not require the inclusion of dead-time for each switching, except when the current polarity changes. Therefore, unlike the conventional inverter switching method, dead-time compensation is not needed, and the possibility of an arm-short accident is prevented. In this study, a switching procedure is detailed, and the operation mode analysis of the proposed switching scheme is presented. The effectiveness of the proposed switching method is verified experimentally by application to a grid-connected inverter that requires inverter current control.

scholarly journals Dead Time Compensation of Grid-connected Inverter Using Resonant Controller

2011 ◽  
Vol 16 (6) ◽  
pp. 569-576 ◽  
Author(s):  
Sang-Hyup Han ◽  
Jong-Hyoung Park ◽  
Heung-Geun Kim ◽  
Honn-Yong Cha ◽  
Tea-Won Chun ◽  
...  
Keyword(s):  
Dead Time ◽  
Resonant Controller ◽  
Grid Connected Inverter ◽  
Dead Time Compensation
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