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http://dx.doi.org/10.6113/JPE.2016.16.5.1928

DC-Link Voltage Balance Control in Three-phase Four-wire Active Power Filters  

Wang, Yu (Department of Electrical Engineering, Tsinghua University)
Guan, Yuanpeng (School of Electric Power, South China University of Technology)
Xie, Yunxiang (School of Electric Power, South China University of Technology)
Liu, Xiang (School of Electric Power, South China University of Technology)
Publication Information
Journal of Power Electronics / v.16, no.5, 2016 , pp. 1928-1938 More about this Journal
Abstract
The three-phase four-wire shunt active power filter (APF) is an effective method to solve the harmonic problem in three-phase four-wire power systems. In addition, it has two possible topologies, a four-leg inverter and a three-leg inverter with a split-capacitor. There are some studies investigating DC-link voltage control in three-phase four-wire APFs. However, when compared to the four-leg inverter topology, maintaining the balance between the DC-link upper and lower capacitor voltages becomes a unique problem in the three-leg inverter with a split-capacitor topology, and previous studies seldom pay attention to this fact. In this paper, the influence of the balance between the two DC-link voltages on the compensation performance, and the influence of the voltage balance controller on the compensation performance, are analyzed. To achieve the balance between the two DC-link capacitor voltages, and to avoid the adverse effect the voltage balance controller has on the APF compensation performance, a new DC-link voltage balance control strategy for the three-phase four-wire split-capacitor APF is proposed. Representative simulation and experimental results are presented to verify the analysis and the proposed DC-link voltage balance control strategy.
Keywords
Active power filter; DC-link voltage balance; Voltage control strategy; Compensation performance;
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Times Cited By KSCI : 3  (Citation Analysis)
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