Using Sequence Decomposition Control to Parallel High Frequency Link Matrix Three-Phase Four-Leg with Unbalanced Load

被引：0
|
作者：
Yan Z. [1 ]
Sun Z. [1 ]
Song X. [1 ]
Li J. [1 ]
Yang L. [1 ]
机构：
[1] Key Lab of Power Electronics for Energy Conversion and Motor Drive of Hebei Province, Yanshan University, Qinhuangdao
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷
关键词：
Droop control; Parallel of high-frequency link matrix three-phase four-leg inverter; Sequence control; Unbalanced condition;
D O I：
10.19595/j.cnki.1000-6753.tces.L80505
中图分类号：
学科分类号：
摘要：
To improve the unbalanced output voltage and uneven power sharing of the parallel system under unbalanced conditions, a new sequential control method for three-phase four-leg inverter is proposed. Also, in order to weaken inherent common mode interference problem of three-phase four-leg inverter, which needs a neutral line, a high-frequency link matrix three-phase four-leg topology is used. Since the zero-sequence current in the system all flow through the fourth leg, the fourth leg and the other three legs can be separately controlled independently; In order to realize the capacity allocation of the parallel inverters, a virtual impedance matching drooping scheme without coupling under two-phase stationary coordinate is proposed for the first three bridge arms, while a separate virtual resistor control scheme used by the fourth bridge. Compared with the traditional one, The proposed control scheme optimizes the design structure of virtual impedance, removes the coupling between the axes and facilitates the design of the closed-loop controller. Also filters the current noise in some extent and improves the output voltage quality. Finally, it realizes a balanced output voltage and a sharing load power by capacity in the system of parallel high-frequency link matrix three-phase four-leg inverter under unbalanced conditions. The experiment and simulation results verify the correctness and feasibility of the proposed method. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：560 / 572
页数：12
相关论文
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