Method of Multiple Low-order Harmonic Currents Suppression Based on Fractional-order Capacitor

被引：0
|
作者：
Lin Z. [1 ]
Zhang J. [1 ]
He L. [1 ]
机构：
[1] Department of Instrumental Electrical Engineering, Xiamen University, Fujian Province, Xiamen
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2022年 / 42卷 / 24期
基金：
中国国家自然科学基金;
关键词：
fractional-order capacitor (FOC); harmonic suppression; low-order harmonic currents; micro-grid system; zero point hunting;
D O I：
10.13334/j.0258-8013.pcsee.211903
中图分类号：
学科分类号：
摘要：
Aiming at the problem of low-order harmonic currents in micro-grid system, this paper proposes a low-order harmonic currents suppression method based on fractional-order capacitors (FOC). This method can achieve the suppression of any order or combination of low-order harmonics and theoretically can achieve complete suppression of low-order harmonic currents. In order to obtain the ideal reference voltage, a zero point hunting strategy is proposed to improve the quality of the output waveform of FOC. The harmonic suppression branch with FOC is connected in parallel to the DC bus, hot-swappable, easy to install, and does not affect the dynamic performance of the system. Meanwhile, the pulsating power only flows between the output side of the inverter and the harmonic suppression branch so that it has little effect on the front-end converter and the power supply. At the same time, the FOC branch can be soft-switched and has low loss. In addition, the capacitor in the fractional-order capacitor branch is multiplexed with the bus capacitor, and the topology is simple. Compared with the existing method, the cost of the system is reduced and the power density is significantly improved. ©2022 Chin.Soc.for Elec.Eng.
引用
收藏
页码：8921 / 8932
页数：11
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