Results 251 to 260 of about 13,972,114 (292)

The neutral point-potential and current model predictive control method for Vienna rectifier

Journal of the Franklin Institute, 2017
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Chaoliang Dang, Xiangqian Tong, Jun Yin, Jingjing Huang, Yao Xu   +4 more
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A FO-ADRC Based Neutral-Point Potential Balancing for Three-Level Inverter

2017 IEEE 23rd International Conference on Parallel and Distributed Systems (ICPADS), 2017
The neutral-point balancing control of neutral-point-clamped (NPC) three-level inverter is concerned. To solve this problem, two steps are considered. First, a new state-space model of DC bus voltage is established to extract the fluctuation of neutral-point potential (NPP) as a special disturbance.
Wenliang Liu, Han Wu, Zhenming Li, Guoyue Zhang, Donglian Qi   +4 more
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A New Balancing Algorithm of Neutral-Point Potential in the Three-Level NPC Converters

2008 IEEE Industry Applications Society Annual Meeting, 2008
The neutral-point (NP) potential of the three-level neutral-point-clamped converters is needed to maintain balanced. Zero-sequence voltage is the only freedom degree when carrier-based PWM is utilized. Appropriate zero-sequence voltage should be identified to control the NP potential.
Chenchen Wang, Yongdong Li
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A neutral-point potential balancing method for Z-source neutral-point-clamped (NPC) inverters by adding the shoot-through offset

2014 International Power Electronics and Application Conference and Exposition, 2014
Compared with the conventional buck-boost three-level inverters, the Z-source neutral-point-clamped (NPC) inverters have more simple structure with improved output waveform quality. But the neutral-point potential unbalance problem is still a drawback for their applications. Based on the research of SPWM modulation method and the analysis of the effect
Xiuyan Shi, Alian Chen, Chenghui Zhang
openaire   +1 more source

Study on the Strategy of Neutral Point Potential Control of Three-level Inverter

2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), 2018
Taking the three-level inverter as the research object, the topology of the main circuit and the space vector voltage modulation algorithm in the 60° coordinate system are introduced. In order to reduce the harm caused by the midpoint potential imbalance, a closed-loop midpoint voltage and current detection method was proposed.
Fan Tian, Xu Jun, Wang Zeyu, Li Ji
openaire   +1 more source

Study on neutral-point potential control for the NPC three-level converter

2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA), 2016
The neutral-point potential control is very difficult for the NPC three-level converter. This paper proposes an accurate model of the NPC three-level converter with parametric perturbation. The developed model mathematically describes that the basic reason for the neutral-point potential drift is the unbalanced distribution of active power caused by ...
Maosong Zhang, Bangxiu Chi, Xiuqin Wang, Qunjing Wang, Guoli Li   +4 more
openaire   +1 more source

Neutral point potential balance control strategy of three level inverter

2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2018
The paper analyzes the principle of diode-clamped three-level inverter mainly from the control strategy of three-level midpoint potential balance. It expounds the reason and harm of the point potential imbalance in the three-level inverter and uses the adjustment of the complementary vector relative working time to control the mid — point potential ...
Jun Tong, Jianwei Qiao, Lijun Liu, Yao Lu, Qian Zhang   +4 more
openaire   +1 more source

A neutral-point potential balancing algorithm for five-level ANPC converters

2011 International Conference on Electrical Machines and Systems, 2011
Five-level active neutral-point-clamped (ANPC) converter is a newly emerging topology which can overcome the drawbacks of traditional neutral-point clamped (NPC) converters and flying-capacitor (FC) converters. Its dc-link is subdivided into two equal parts and the main problem is the neutral-point (NP) potential balancing.
Kui Wang, Yongdong Li, Zedong Zheng
openaire   +1 more source

A novel modulation strategy providing loss balancing and neutral point potential balancing for three-level active neutral-point-clamped converter

2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), 2015
This paper proposes a novel PWM strategy for three-level active neutral-point-clamped (ANPC) converter, this strategy can balance the power losses of all semiconductors and eliminate the fluctuation in the neutral point voltage over full range of converter output voltage and for all load power factors of ANPC converter.
Bo Zhang, Qiongxuan Ge, Ping Wang, Xiaoxin Wang, Yang Yu   +4 more
openaire   +1 more source

A neutral point potential control for three‐level neutral‐point‐clamped converters based on the search optimization method of the two degrees of freedom

IEEJ Transactions on Electrical and Electronic Engineering, 2018
To realize the neutral point potential (NPP) control for three‐level neutral‐point‐clamped (TL‐NPC) converters, a novel NPP control based on the search optimization method of the two degrees of freedom is proposed in this paper. It can overcome the low‐frequency NPP fluctuation problem that appears under nearest‐three‐vector pulse width modulation (PWM)
Bo Guan, Shinji Doki
openaire   +1 more source