Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems

Zeng Liu; Igor Cvetkovic; Zhiyu Shen; Dushan Boroyevich; Rolando Burgos; Jinjun Liu

doi:10.1109/APEC.2018.8341267

Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems

Zeng Liu
, Igor Cvetkovic
, Zhiyu Shen
, Dushan Boroyevich
, Rolando Burgos
, Jinjun Liu

School of Electrical Engineering

Virginia Polytechnic Institute and State University
General Electric

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Small-signal stability of AC power systems is able to be predicted by measuring their terminal impedances, and the transformerless series injector is attractive for measuring load subsystem impedance in wide frequency range. The series injector paralleling H-bridge converters is studied in this paper, where the DC voltage unbalance mechanism is analyzed by modeling the active power flow of the converters, and it is revealed that a positive feedback exists under the situation of high system current. Furthermore, an enhanced control scheme is proposed to make the series injector operate in full system current range. Finally, the theoretical analysis is verified by hardware test results.

Original language	English
Title of host publication	APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1841-1845
Number of pages	5
ISBN (Electronic)	9781538611807
DOIs	https://doi.org/10.1109/APEC.2018.8341267
State	Published - 18 Apr 2018
Event	33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States Duration: 4 Mar 2018 → 8 Mar 2018

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume	2018-March

Conference

Conference	33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Country/Territory	United States
City	San Antonio
Period	4/03/18 → 8/03/18

Keywords

DC voltage balance
H-bridge converters
Impedance measurement
Series injector
Small-signal stability

Access to Document

10.1109/APEC.2018.8341267

Cite this

Liu, Z., Cvetkovic, I., Shen, Z., Boroyevich, D., Burgos, R., & Liu, J. (2018). Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems. In APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition (pp. 1841-1845). (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2018-March). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2018.8341267

Liu, Zeng ; Cvetkovic, Igor ; Shen, Zhiyu et al. / Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems. APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc., 2018. pp. 1841-1845 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

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title = "Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems",

abstract = "Small-signal stability of AC power systems is able to be predicted by measuring their terminal impedances, and the transformerless series injector is attractive for measuring load subsystem impedance in wide frequency range. The series injector paralleling H-bridge converters is studied in this paper, where the DC voltage unbalance mechanism is analyzed by modeling the active power flow of the converters, and it is revealed that a positive feedback exists under the situation of high system current. Furthermore, an enhanced control scheme is proposed to make the series injector operate in full system current range. Finally, the theoretical analysis is verified by hardware test results.",

keywords = "DC voltage balance, H-bridge converters, Impedance measurement, Series injector, Small-signal stability",

author = "Zeng Liu and Igor Cvetkovic and Zhiyu Shen and Dushan Boroyevich and Rolando Burgos and Jinjun Liu",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 ; Conference date: 04-03-2018 Through 08-03-2018",

year = "2018",

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doi = "10.1109/APEC.2018.8341267",

language = "英语",

series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",

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Liu, Z, Cvetkovic, I, Shen, Z, Boroyevich, D, Burgos, R & Liu, J 2018, Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems. in APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, vol. 2018-March, Institute of Electrical and Electronics Engineers Inc., pp. 1841-1845, 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018, San Antonio, United States, 4/03/18. https://doi.org/10.1109/APEC.2018.8341267

Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems. / Liu, Zeng; Cvetkovic, Igor; Shen, Zhiyu et al.
APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc., 2018. p. 1841-1845 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2018-March).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems

AU - Liu, Zeng

AU - Cvetkovic, Igor

AU - Shen, Zhiyu

AU - Boroyevich, Dushan

AU - Burgos, Rolando

AU - Liu, Jinjun

PY - 2018/4/18

Y1 - 2018/4/18

N2 - Small-signal stability of AC power systems is able to be predicted by measuring their terminal impedances, and the transformerless series injector is attractive for measuring load subsystem impedance in wide frequency range. The series injector paralleling H-bridge converters is studied in this paper, where the DC voltage unbalance mechanism is analyzed by modeling the active power flow of the converters, and it is revealed that a positive feedback exists under the situation of high system current. Furthermore, an enhanced control scheme is proposed to make the series injector operate in full system current range. Finally, the theoretical analysis is verified by hardware test results.

AB - Small-signal stability of AC power systems is able to be predicted by measuring their terminal impedances, and the transformerless series injector is attractive for measuring load subsystem impedance in wide frequency range. The series injector paralleling H-bridge converters is studied in this paper, where the DC voltage unbalance mechanism is analyzed by modeling the active power flow of the converters, and it is revealed that a positive feedback exists under the situation of high system current. Furthermore, an enhanced control scheme is proposed to make the series injector operate in full system current range. Finally, the theoretical analysis is verified by hardware test results.

KW - DC voltage balance

KW - H-bridge converters

KW - Impedance measurement

KW - Series injector

KW - Small-signal stability

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M3 - 会议稿件

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ER -

Liu Z, Cvetkovic I, Shen Z, Boroyevich D, Burgos R, Liu J. Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems. In APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc. 2018. p. 1841-1845. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). doi: 10.1109/APEC.2018.8341267

Analysis and control of a transformerless series injector based on paralleled H-bridge converters for measuring impedance of three-phase AC power systems

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Keywords

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