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Universal voltage clamping circuit for T-type neutral-point-clamped (TNPC) converters
2014 International Power Electronics and Application Conference and Exposition, 2014In this paper, a universal voltage clamping circuit for the T-type neutral-point-clamped (TNPC) converter is introduced. It is shown that, for any TNPC implementation, the proposed voltage clamping circuit can well suppress all voltage spikes of power devices at the switching transients. Therefore, the devices can operate in a much safer region.
Weiyi Feng +3 more
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2009 IEEE 6th International Power Electronics and Motion Control Conference, 2009
This paper shows the equivalent of different strategies in neutral point voltage control under different modulation methods --- CBPWM and SVPWM. With this concept we can go from one strategy in CBPWM to another in SVPWM freely, and also newly found strategies that will be used not only in CBPWM but also in SVPWM.
null Yituo Li, null Wenlong Qu
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This paper shows the equivalent of different strategies in neutral point voltage control under different modulation methods --- CBPWM and SVPWM. With this concept we can go from one strategy in CBPWM to another in SVPWM freely, and also newly found strategies that will be used not only in CBPWM but also in SVPWM.
null Yituo Li, null Wenlong Qu
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Elimination of neutral point potential oscillations in the four pole neutral point clamped converter
2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia), 2017This paper investigates the effect of neutral point potential oscillation on four pole neutral point clamped converter. The detailed derivation indicates such oscillation is closely associated with neutral point current, so this paper presents a modulation technique to effectively eliminate this neutral point current. Besides, an offset injected method
null Meng-jiang Tsai, null Po-tai Cheng
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A novel neutral point potential control for the three-level neutral-point-clamped converter
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016Three-level neutral-point-clamped (NPC) converters/inverters have become a popular topology for not only medium-voltage (1k–33k) but also low-voltage level industrial application because of its reduced transistor block voltage and lower output current distortion.
Hsin-chih Chen +3 more
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Analysis of Neutral-Point Voltage Balancing in Three-Ports Active Neutral-Point-Clamped Converter
2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019This paper investigates the neutral-point (NP) voltage balancing problem from the perspective of the space vector modulation for different operating conditions of the recently proposed Three-ports Active Neutral-Point-Clamped (ANPC-3P) topology, which can integrate one energy storage system per inverter leg.
Kaio Vinicius Vilera +2 more
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Neutral point balancing technique for 3-level neutral point clamped converter with servo system
2017 IEEE 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 2017Neutral point voltage drift compensation technique in 3-level NPC multilevel converter and servo system is described in the paper. Analytical expressions are obtained for power subsystem elements parameters of servo drive system. Simulation of servo system, based on PMSM motor with 3-level NPC converter is considered.
Pavel Zolov +3 more
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Improved Four-Level Neutral Point Clamped Converter
2021 24th International Conference on Electrical Machines and Systems (ICEMS), 2021Xinmin Jia, Zhe Huang, Jianfei Chen
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PWM Method of a Three-Level Neutral-Point-Clamped Converter under Neutral Point Imbalance Condition
APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition, 2007Imbalance of the neutral-point potential in three-level neutral-point-clamped converter may appear in some operating conditions. This paper analyzes the voltage distortion caused by the imbalance of the neutral point potential in a three-level neutral-point-clamped converter, and also describes the PWM method to generate the low-frequency harmonics ...
Jang-Hwan Kim, Seung-Ki Sul
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Control of a four-level active neutral point clamped converter with neutral point voltage balance
2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), 2016In this paper, a carrier-based modulation method with optimal zero-sequence signal injection has been devised to modulate the converter and regulate the DC-link neutral points' voltages of a four-level active neutral point clamped (ANPC) converter. With the proposed control strategy, the two neutral points' voltages can be well controlled with a back ...
Jin, Bosen, Yuan, Xibo
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Neutral point voltage control of neutral point clamped converters
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 ...openaire +1 more source