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 Model Predictive Current Control with Fixed Switching Frequency and Dead-Time Compensation for Single-Phase PWM Rectifier

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 426 ◽  
Author(s):  
Longyun Kang ◽  
Jianbin Zhang ◽  
Hailan Zhou ◽  
Zixian Zhao ◽  
Xinwei Duan
Keyword(s):  
Single Phase ◽  
Dead Time ◽  
Prediction Equation ◽  
Current Control ◽  
Switching Frequency ◽  
Pwm Rectifier ◽  
Action Time ◽  
Optimal Action ◽  
The Dead ◽  
Dead Time Compensation

The research object of this paper is single-phase PWM rectifier, the purpose is to reduce the total harmonic distortion (THD) of the grid-side current. A model predictive current control (MPCC) with fixed switching frequency and dead-time compensation is proposed. First, a combination of an effective vector and two zero vectors is used to fix the switching frequency, and a current prediction equation based on the effective vector’s optimal action time is derived. The optimal action time is resolved from the cost function. Furthermore, in order to perfect the established prediction model and suppress the current waveform distortion as a consequence of the dead-time effect, the dead-time’s influence on the switching vector’s action time is analyzed, and the current prediction equation is revised. According to the experimental results, the conclusion is that, firstly, compared with finite-control-set model predictive control, proportional-integral-based instantaneous current control (PI-ICC) scheme and model predictive direct power control (MP-DPC), the proposed MPCC has the lowest current THD. In addition, the proposed MPCC has a shorter execution time than MP-DPC and has fewer adjusted parameters than PI-ICC. In addition, the dead-time compensation scheme successfully suppresses the zero-current clamping effects, and reduce the current THD.

A Dead-Time Compensation Method for Parabolic Current Control With Improved Current Tracking and Enhanced Stability Range

2015 ◽  
Vol 30 (7) ◽  
pp. 3892-3902 ◽  
Author(s):  
Lanhua Zhang ◽  
Bin Gu ◽  
Jason Dominic ◽  
Baifeng Chen ◽  
Cong Zheng ◽  
...  
Keyword(s):  
Dead Time ◽  
Current Control ◽  
Compensation Method ◽  
Stability Range ◽  
Dead Time Compensation ◽  
Enhanced Stability

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

scholarly journals Lyapunov-Induced Model Predictive Power Control for Grid-Tie Three-Level Neutral-Point-Clamped Inverter With Dead-Time Compensation

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 166869-166882 ◽  
Author(s):  
Van-Quang-Binh Ngo ◽  
Van-Hiep Vu ◽  
Viet-Tuan Pham ◽  
Huu-Nhan Nguyen ◽  
Pedro Rodriguez-Ayerbe ◽  
...  
Keyword(s):  
Power Control ◽  
Predictive Power ◽  
Dead Time ◽  
Neutral Point ◽  
Dead Time Compensation

Dead-time compensation technique for robust predictive current control

2017 ◽  
Author(s):  
Noelia. I. Echeverria ◽  
Jonatan R. Fischer ◽  
Juan F. Martinez ◽  
Marcos G. Judewicz ◽  
Sergio A. Gonzalez
Keyword(s):  
Dead Time ◽  
Current Control ◽  
Compensation Technique ◽  
Dead Time Compensation
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