DC-Link Voltage Ripple Control of Regenerative CHB Drives for Capacitance Reduction

被引:16
作者
Ni, Zhituo [1 ]
Abuelnaga, Ahmed [1 ]
Narimani, Mehdi [1 ]
Zargari, Navid R. [2 ]
机构
[1] McMaster Univ, Dept Elect & Comp Engn, Hamilton, ON L8S 4L8, Canada
[2] Rockwell Automat Canada, Cambridge, ON N1R 5N9, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Capacitors; Capacitance; Voltage control; Drives; Rectifiers; Power system stability; Current measurement; Adaptive filtering; dc-link capacitor reduction; multilevel drives; regenerative; stability; SELECTIVE HARMONIC COMPENSATION; CONVERTERS; FILTER;
D O I
10.1109/TIE.2021.3076727
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The diode-front-end cascaded H-bridge (CHB) inverters have prevailed in the nonregenerative industry drive domain for high-power medium-voltage applications. The regenerative version of the CHB drives is made possible by adding the extra active-front-end rectifier in each power cell, such as a three-phase PWM rectifier. However, due to the instantaneous power unbalance, the dc-link capacitors of the regenerative power cell need to be overdesigned to maintain a stable low ripple dc-link voltage. To reduce the dc-link capacitance, this article proposes a novel closed-loop voltage ripple controller for the regenerative CHB drive without adding extra sensors. In the proposed method, dc-link voltage ripple amplitude and phase angle are accurately detected with a high-performance adaptive filter. Moreover, a latent instability issue is discussed and is avoided in the proposed controller. The performance of the proposed control strategy is validated experimentally on a seven-level regenerative CHB drive.
引用
收藏
页码:3245 / 3254
页数:10
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