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Neutral point voltage control of neutral point clamped converters

, 2014
The most widely used Medium Voltage multilevel converter is the 3-level AC/DC Neutral-Point Clamped (NPC) converter. It provides: a) twice the voltage rating, b) a reduction in the volumetric size and weight over the traditional 2-level converter. However, these benefits are lost when the Neutral Point (NP) drifts away from its ideal value (0 V).The ...
Zaki Mohzani (19993662)
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A Novel Virtual Space Vector Modulation With Reduced Common-Mode Voltage and Eliminated Neutral Point Voltage Oscillation for Neutral Point Clamped Three-Level Inverter

IEEE Transactions on Industrial Electronics, 2020
This paper briefly reviews the common-mode voltage (CMV) and neutral point (NP) voltage for neutral point clamped three-level inverter (NPC TLI). Then, the space vector pulsewidth modulation (SVPWM) and traditional virtual SVPWM (VSVPWM) are discussed in terms of these two issues, revealing the drawbacks in reducing CMV or eliminating NP voltage ...
Mingna Ma, Kewei Chen, Jinping Wang
exaly   +2 more sources

Hybrid Modulation Strategies for Eliminating Low-Frequency Neutral-Point Voltage Oscillations in the Neutral-Point-Clamped Converter

IEEE Transactions on Power Electronics, 2013
Nearest vector (NV) modulation strategies for the neutral-point-clamped converter are known to generate low-frequency neutral point (NP) voltage oscillations. Non-NV strategies can eliminate these oscillations, but at the expense of higher switching losses and output voltage harmonic distortion.
Suleiman Mahmoud Sharkh, Georgios Orfanoudakis   +1 more
exaly   +3 more sources

Design of Neutral-Point Voltage Controller of a Three-Level NPC Inverter With Small DC-Link Capacitors

IEEE Transactions on Industrial Electronics, 2013
A neutral-point-clamped three-level inverter with small dc-link capacitors is presented in this paper. The inverter requires zero average neutral-point current for stable neutral–point voltage.
Stig Munk-Nielsen, Ramkrishan Maheshwari, Sergio Busquets Monge   +2 more
exaly   +3 more sources

Effect of Zero-Sequence Voltage on the Maximum Average Neutral-Point Current Limit of Neutral-Point-Clamped Converters

IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society, 2021
In this paper, the effect of min-max zero-sequence voltage (ZSV) injection on the maximum average neutral-point (NP) current control limits of a neutral-point-clamped (NPC) converter is analyzed. These current limits determine the stable operating range of the NPC converter in applications that impose a nonzero average NP current, like- NPC converters ...
Neha Beniwal, Glen G. Farivar, Salvador Ceballos, Naga Brahmendra Yadav Gorla, Josep Pou   +4 more
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Neutral-Point Voltage Interactions on a Medium-Voltage DC-Link

2024 IEEE International Conference on Engineering Veracruz (ICEV)
The neutral-point-clamped (NPC) converter has been often used in power systems for various applications. A key difficulty with its application is the balancing of the neutral-point (NP) voltage.
Miriam Prażmowska-Toporowska, Agustín Leobardo Herrera-May   +1 more
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Common-mode voltage reduction in three-level neutral-point-clamped converters with neutral point voltage balance

2013 IEEE International Symposium on Industrial Electronics, 2013
This paper investigates two conflictive issues of common-mode (CM) voltage reduction and neutral point (NP) voltage balancing in a three-level neutral-point-clamped (NPC) converter. The amplitude of NP voltage variation under CM voltage mitigation scheme has been derived analytically.
Xibo Yuan, Jason Yon, Phil H. Mellor
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Neutral point voltage level stabilization and DC link capacitors voltage balance in neutral point clamped multilevel inverters

2016 11th International Conference on Industrial and Information Systems (ICIIS), 2016
The Neutral point clamped (NPC) inverter has unbalancing problems of neutral point voltage and DC link capacitors voltages, generally dc link capacitor voltage unbalance leads to neutral point voltage unbalance. In this paper neutral point voltage is balanced using sine PWM associated with phase shift technique.
K. Anuradha, Gandla Radha Krishna
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Voltage Boost by Neutral Point Supply of AC Machine

2020
A new concept of AC motor drive is proposed in this paper. It allows to boost voltage of an AC machine without supplementary components. The main idea is to wisely connect the neutral point of the AC machine to the DC power supply. With some modifications on the control algorithm, the proposed solution allows to supply the AC machine with a higher ...
Gauthier, Jean-Yves, Lin-Shi, Xuefang
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Zero-voltage switching for the neutral-point-clamped (NPC) inverter

IEEE Transactions on Industrial Electronics, 2002
This paper proposes a transformer-assisted pulsewidth-modulation zero-voltage-switching neutral-point-clamped (NPC) inverter. With the assistance of a transformer-assisted small-rating lossless auxiliary circuit, the main switches work with zero-voltage switching without suffering from any voltage/current spikes, under simple explicit control.
Xiaoming Yuan, Ivo Barbi
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