An Improved Overmodulation Strategy for a Three-Level NPC Inverter Considering Neutral-Point Voltage Balance and Common-Mode Voltage Suppression

被引：3

作者：

Ma, Zhixun ^{[1
,2
,3
]}

Niu, Haichuan ^{[1
,3
,4
]}

Wu, Xiang ^{[5
]}

Zhang, Xu ^{[1
]}

Lin, Guobin ^{[1
]}

机构：

[1] Tongji Univ, Natl Maglev Transportat Engn R&D Ctr, Shanghai 201804, Peoples R China

[2] Minist Educ, Key Lab Control Power Transmiss & Convers SJTU, Shanghai 200240, Peoples R China

[3] Key Lab Rd & Traff Engn State Minist Educ, Shanghai 201804, Peoples R China

[4] Tongji Univ, Coll Transportat Engn, Shanghai 201804, Peoples R China

[5] China Univ Min & Technol, Sch Elect Engn, Xuzhou 221008, Jiangsu, Peoples R China

来源：

SUSTAINABILITY | 2022年 / 14卷 / 19期

基金：

上海市自然科学基金;

关键词：

three-level neutral-point clamped voltage source inverter (3L-NPC-VSI); maglev traction systems; overmodulation; virtual space vector; SPACE VECTOR MODULATION; PREDICTIVE CONTROL; REDUCTION; PWM; CONVERTERS; OPERATION;

D O I：

10.3390/su141912558

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The three-level neutral-point clamped voltage source inverter (3L-NPC-VSI) is widely used in the maglev traction systems due to its high output voltage, large output capacity and low output current harmonics. In order to improve the utilization of the DC-bus voltage, an overmodulation strategy is necessary. This paper proposes an improved overmodulation strategy based on the minimum amplitude error method for a 3L-NPC-VSI. Compared with the conventional overmodulation strategy based on the minimum amplitude error method, the utilization of the DC-bus voltage is higher. Meanwhile, a virtual space vector modulation strategy is adopted for inverter neutral-point (NP) voltage balance and common-mode voltage (CMV) suppression. Furthermore, the suppression of leakage current also has been verified. Furthermore, the implementation details of the proposed overmodulation strategy based on minimum amplitude error method is elaborated. The effectiveness of the proposed method is verified by simulation and experimental results.

引用

页数：16

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