DC capacitor voltage balancing control for delta-connected cascaded h-bridge STATCOM considering the unbalanced grid and load conditions

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 feedforward control method. The method can conspicuously improve the dynamic...

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Bibliographic Details
Published in2016 IEEE Energy Conversion Congress and Exposition (ECCE) pp. 1 - 8
Main Authors Jae-Jung Jung, Joon-Hee Lee, Seung-Ki Sul, Gum Tae Son, Yong-Ho Chung
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2016
Subjects
Automatic voltage control
Capacitors
cascaded h-bridge converter(CHB)
cluster balancing
Feedforward neural networks
flicker compensation
leg balancing
Legged locomotion
Power quality
Reactive power
static synchronous compensator(STATCOM)
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Summary: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 feedforward control method. The method can conspicuously improve the dynamics of 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 full scaled simulation results and the down scaled experimental results verify that stable operation is guaranteed for both emulated grid and load unbalance conditions.
DOI:10.1109/ECCE.2016.7854988