Compensation-Voltage-Injection-Based Neutral-Point Voltage Fluctuation Suppression Method for NPC Converters

被引：0
|
作者：
Chen, Guo [1 ]
Gong, Chunyang [2 ]
Bao, Jun [3 ]
Zhu, Lihua [4 ]
Wang, Zhixin [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China
[2] Shanghai Univ Elect Power, Collage Elect Engn, Shanghai 200090, Peoples R China
[3] Shanghai Xilong Technol Co Ltd, Shanghai 201109, Peoples R China
[4] Shanghai Chint Power Syst Co Ltd, Shanghai 201614, Peoples R China
来源：
ENERGIES | 2023年 / 16卷 / 11期
关键词：
NPC; voltage balance control; compensation voltage injection; neutral-point current; MODULATION TECHNIQUES; PWM STRATEGY; OSCILLATION; REDUCTION; SCHEME;
D O I：
10.3390/en16114409
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Three-level neutral-point clamped (NPC) inverters are widely used in the new energy power generation, motor drive, and many other occasions. However, the neutral-point voltage imbalance of an NPC inverter will affect the output of the inverter system, and the control of the neutral point voltage has become a popular research topic. In this paper, a compensation-voltage-injection-based neutral-point voltage balancing method is proposed. During the switching cycle, the average value model of the neutral-point current under different voltage vectors is applied to calculate the value of the compensation voltage that needs to be injected. The self-balance of the neutral-point voltage based on a switching cycle is realized, and the influence of modulation ratio and power factor on equalization ability is discussed. A MATLAB/Simulink simulation model and a small power prototype are established to verify the effectiveness of the method, and the simulation and experimental results show that the proposed method can effectively suppress the neutral-point voltage fluctuation in a wide range of modulation ratios and power factors.
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页数：20
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