A systematic study on the harmonic overlap effects for dc/ac converters under low switching frequency modulation

Wang，Ze1; He，Zhen2; Gao，Chao3

2021-05-02

10.3390/en14102811

Energies   影响因子和分区

1996-1073

In most high power industrial applications, the low switching frequency modulations (LSFM) are usually implemented to reduce power loss and heat dissipation pressure. However, there are some unexpected influences caused by the low order harmonic sinusoidal pulse width modulation (SPWM), such as the imbalanced submodule power in cascaded half-bridge inverter (CHB) and limited output power capability in H-bridge neutral-point-clamped (HNPC) converter. This paper starts by generalizing the basic characteristic of two-level SPWM, then deeply investigates the influences of low-frequency modulation on the operation of the circuits. They are classified into three mechanisms and generally named as harmonic overlap effect (HOE). The corresponding solutions to copy with the mechanisms are proposed and verified in some topologies through high-power simulations in simulations. In addition, a comprehensive summary of the influences and solutions of these effects on typical high power converters is drawn. The design rules of the modulation schemes for multilevel voltage source converters (VSCs) at low switching frequency are also proposed.

Harmonic overlap effect High power conversion Low switching frequency modulation Multilevel converters

SCI ; EI

英语

第一 ; 通讯

WOS:000662432500001

20212210443697

Bridge circuits ; Electric inverters ; Harmonic analysis ; Switching frequency ; Voltage control

Electric Components and Equipment:704 ; Specific Variables Control:731.3 ; Numerical Methods:921.6

2-s2.0-85106882771

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Automation,Hangzhou Dianzi University,Hangzhou,310018,China
3.State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan,430074,China

Wang，Ze,He，Zhen,Gao，Chao. A systematic study on the harmonic overlap effects for dc/ac converters under low switching frequency modulation[J]. Energies,2021,14(10).

Wang，Ze,He，Zhen,&Gao，Chao.(2021).A systematic study on the harmonic overlap effects for dc/ac converters under low switching frequency modulation.Energies,14(10).

Wang，Ze,et al."A systematic study on the harmonic overlap effects for dc/ac converters under low switching frequency modulation".Energies 14.10(2021).