Three-Phase Y-Rectifier Cyclic 2 Out of 3 DC Output Voltage Balancing Control Method

Z-source inverter can boost the voltage of the DC-side, allow the two switches of the same leg conducting at the same time and it has some other advantages. The zero-sequence current flows through the fourth leg of the three-phase four-leg inverter so the three-phase four-leg inverter can work with unbalanced load. This paper presents a Z-source three-phase four-leg inverter which combines a Z-source network with three-phase four-leg inverter. The circuit uses simple SPWM modulation technique and the fourth leg uses fully compensated control method. The inverter can maintain a symmetrical output voltage when the proposed scheme under the unbalanced load.

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Voltage Balancing Control for Four-Switch Three-Phase Active Front-End Rectifier

2021 IEEE 12th Energy Conversion Congress & Exposition - Asia (ECCE-Asia) ◽

10.1109/ecce-asia49820.2021.9479135 ◽

2021 ◽

Author(s):

Chang-Hsi Tsai ◽

Hung-Chi Chen

Keyword(s):

Voltage Balancing ◽

Front End ◽

Three Phase ◽

Balancing Control

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A novel control method for an isolated three-phase induction generator with constant frequency and adjustable output voltage

International Transactions on Electrical Energy Systems ◽

10.1002/etep.2178 ◽

2016 ◽

Vol 26 (10) ◽

pp. 2074-2086 ◽

Cited By ~ 2

Author(s):

Mohammadreza Moradian ◽

Jafar Soltani

Keyword(s):

Output Voltage ◽

Control Method ◽

Induction Generator ◽

Constant Frequency ◽

Three Phase

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Voltage balancing control of a three-phase hybrid-clamped five-level inverter based on optimal zero-sequence voltage injection

2014 16th European Conference on Power Electronics and Applications ◽

10.1109/epe.2014.6910768 ◽

2014 ◽

Author(s):

Xiaokun Wu ◽

Zedong Zheng ◽

Kui Wang ◽

Yongdong Li

Keyword(s):

Voltage Balancing ◽

Three Phase ◽

Zero Sequence ◽

Zero Sequence Voltage ◽

Balancing Control

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A Capacitor Voltage Balancing Control Method for Five-Level Full-Bridge Grid-Tied Inverters Without Split-Capacitor Voltage Sampling

IEEE Journal of Emerging and Selected Topics in Power Electronics ◽

10.1109/jestpe.2017.2785819 ◽

2018 ◽

Vol 6 (4) ◽

pp. 2042-2052 ◽

Cited By ~ 7

Author(s):

Li Zhang ◽

Kai Sun ◽

Mingchen Gu ◽

Dewei Xu ◽

Yifan Gu

Keyword(s):

Control Method ◽

Voltage Balancing ◽

Capacitor Voltage ◽

Split Capacitor ◽

Balancing Control

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Analytical Modeling of Neutral Point Current in T-type Three-level PWM Converter

Energies ◽

10.3390/en13061324 ◽

2020 ◽

Vol 13 (6) ◽

pp. 1324

Author(s):

Kui-Jun Lee

Keyword(s):

Analytical Model ◽

Neutral Point ◽

Control Loop ◽

Pwm Converter ◽

Voltage Balancing ◽

Loop Design ◽

Offset Voltage ◽

Three Phase ◽

Effective Voltage ◽

Balancing Control

Since a T-type three-level PWM converter has several intrinsic advantages, it has been researched for various applications such as grid-connected converter systems. However, it necessarily requires an additional voltage control loop for balancing the upper and the lower DC-link voltage. To satisfy this requirement, an offset voltage is widely used to provide a neutral point current without affecting other variables such as total DC-link voltage and three-phase input current. However, these methods are mostly based on the averaged value between the applied offset voltage and the neutral point voltage or current, and there is no exact analytical model. Therefore, in this paper, the exact theoretical relationship between the offset voltage and the neutral point current is analyzed. This result can be expected to be useful for an effective voltage balancing control loop design as well as the better understanding of the whole system operation. The validity of the obtained analytical model is verified by simulation and experimental results.

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