DC Capacitor Voltage Balancing Control for Delta-Connected Cascaded H-Bridge STATCOM Considering Unbalanced Grid and Load Conditions

被引：59

作者：

Jung, Jae-Jung ^{[1
]}

Lee, Joon-Hee ^{[1
]}

Sul, Seung-Ki ^{[1
]}

Son, Gum Tae ^{[2
]}

Chung, Yong-Ho ^{[2
]}

机构：

[1] Seoul Natl Univ, Dept Elect & Comp Engn, Seoul 08826, South Korea

[2] LSIS Co Ltd, Gyeonggi Do 14118, South Korea

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2018年 / 33卷 / 06期

关键词：

Cascaded H-bridge converter (CHB); circulating current control; cluster balancing; grid unbalance; leg balancing; load unbalance; static synchronous compensator (STATCOM); zero-sequence current injection; MULTILEVEL ACTIVE RECTIFIER; PWM STATCOM; STAR; COMPENSATION; MODULATION; INVERTERS;

D O I：

10.1109/TPEL.2017.2730244

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 this paper, a comprehensive control scheme for a delta-connected cascaded H-bridge (CHB) converter-based static synchronous compensator (STATCOM) is presented, especially focusing on improving dynamic performance by novel feed-forward control method. The method can conspicuously improve the dynamics of zero-sequence circulating current regulation of delta-connected CHB STATCOM especially under grid fault condition as well as load unbalance without excessive dc cell capacitor voltage fluctuation. The validity of the proposed method is demonstrated by mathematical proof. Finally, the full-scaled simulation results and the down-scaled experimental results verify that stable operation is guaranteed for both emulated grid and load unbalance conditions.

引用

页码：4726 / 4735

页数：10

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