Coordinated Control of Second-Order Harmonic Voltage and Current Fluctuations in Cascaded H-Bridge Inverter with Supercapacitor and DC-DC Stage at Variable Output Frequencies

被引：0
作者：
Zhang, Ye [1 ,2 ]
Li, Zixin [1 ,2 ]
Gao, Fanqiang [1 ,2 ]
Zhang, Jinhao [1 ,2 ]
Zhao, Cong [1 ,2 ]
Li, Yaohua [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Elect Engn, Key Lab High Dens Electromagnet Power & Syst, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CES TRANSACTIONS ON ELECTRICAL MACHINES AND SYSTEMS | 2024年 / 8卷 / 04期
关键词：
Harmonic analysis; Fluctuations; Voltage control; Power harmonic filters; Capacitors; Voltage fluctuations; Inverters; Frequency control; Supercapacitors; Stress; Cascaded H-bridge inverter (CHBI); DC-DC current reduction; Second-order harmonic fluctuation; Variable frequencies; Proportional-integral-resonant; 2ND-HARMONIC CURRENT REDUCTION; CONTROL SCHEMES; CONVERTER;
D O I：
10.30941/CESTEMS.2024.00038
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In the cascaded H-bridge inverter (CHBI) with supercapacitor and dc-dc stage, inherent second-order harmonic power flows through each submodule (SM), causing fluctuations in both the dc-link voltage and the dc-dc current. There exist limitations in handling these fluctuations at variable output frequencies when employing proportional-integral (PI) control to the dc-dc stage. This paper aims to coordinately control these second-order harmonic voltage and current fluctuations in the CHBI. The presented method configures a specific second-order harmonic voltage reference, equipped with a maximum voltage fluctuation constraint and a suitable phase, for the dc-dc stage. A PI-resonant controller is used to track the configured reference. This allows for regulating the second-order harmonic fluctuation in the average dc-link voltage among the SMs within a certain value. Importantly, the second-order harmonic fluctuation in the dc-dc current can also be reduced. Simulation and experimental results demonstrate the effectiveness of the presented method.
引用
收藏
页码：481 / 492
页数：12
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