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

Jae Jung Jung; Joon Hee Lee; Seung Ki Sul; Gum Tae Son; Yong Ho Chung

doi:10.1109/TPEL.2017.2730244

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

Jae Jung Jung, Joon Hee Lee, Seung Ki Sul, Gum Tae Son, Yong Ho Chung

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

64 Scopus citations

Abstract

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 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.

Original language	English
Pages (from-to)	4726-4735
Number of pages	10
Journal	IEEE Transactions on Power Electronics
Volume	33
Issue number	6
DOIs	https://doi.org/10.1109/TPEL.2017.2730244
State	Published - Jun 2018

Keywords

Cascaded H-bridge converter (CHB)
circulating current control
cluster balancing
grid unbalance
leg balancing
load unbalance
static synchronous compensator (STATCOM)
zero-sequence current injection

Access to Document

10.1109/TPEL.2017.2730244

Cite this

@article{d4408e7273094621bac2230cb962b4a9,

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

abstract = "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 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.",

keywords = "Cascaded H-bridge converter (CHB), circulating current control, cluster balancing, grid unbalance, leg balancing, load unbalance, static synchronous compensator (STATCOM), zero-sequence current injection",

author = "Jung, {Jae Jung} and Lee, {Joon Hee} and Sul, {Seung Ki} and Son, {Gum Tae} and Chung, {Yong Ho}",

note = "Publisher Copyright: {\textcopyright} 1986-2012 IEEE.",

year = "2018",

month = jun,

doi = "10.1109/TPEL.2017.2730244",

language = "English",

volume = "33",

pages = "4726--4735",

journal = "IEEE Transactions on Power Electronics",

issn = "0885-8993",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "6",

}

TY - JOUR

T1 - DC Capacitor Voltage Balancing Control for Delta-Connected Cascaded H-Bridge STATCOM Considering Unbalanced Grid and Load Conditions

AU - Jung, Jae Jung

AU - Lee, Joon Hee

AU - Sul, Seung Ki

AU - Son, Gum Tae

AU - Chung, Yong Ho

PY - 2018/6

Y1 - 2018/6

N2 - 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 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.

AB - 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 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.

KW - Cascaded H-bridge converter (CHB)

KW - circulating current control

KW - cluster balancing

KW - grid unbalance

KW - leg balancing

KW - load unbalance

KW - static synchronous compensator (STATCOM)

KW - zero-sequence current injection

UR - http://www.scopus.com/inward/record.url?scp=85028921603&partnerID=8YFLogxK

U2 - 10.1109/TPEL.2017.2730244

DO - 10.1109/TPEL.2017.2730244

M3 - Article

AN - SCOPUS:85028921603

SN - 0885-8993

VL - 33

SP - 4726

EP - 4735

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 6

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this