Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation

Ezequiel Rodriguez; Ramon Leyva; Glen G. Farivar; Christopher D. Townsend; Josep Pou

doi:10.1109/PEDG54999.2022.9923219

Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation

Ezequiel Rodriguez, Ramon Leyva, Glen G. Farivar, Christopher D. Townsend, Josep Pou

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

The cascaded H-bridge (CHB) low-capacitance static compensator (LC-STATCOM) with delta configuration has the capability to inject positive- and negative-sequence currents simultaneously. However, to maintain the energy balance among the converter arms, a fundamental-frequency zero-sequence current must flow within the delta ring. This may involve greater peak arm current values, which, in turn, limits the range of positive- and negative-sequence currents that the STATCOM can provide. In the LC-STATCOM, the inherent large twice-fundamental-frequency oscillation on the capacitor voltages also can bound its operating range. This paper analyses the operating range constraints in LC-STATCOMs and analytically derives its operating limits. Analytical derivations show that the allowable steady-state region corresponds to a polyhedron in Cartesian coordinates. The obtained polyhedra, for different desired performances, represent a new tool that shows the operating limits of STATCOMs and can assist in their design. The paper presents simulation results to corroborate that the operational limits correspond to those shown by the derived polyhedron. © 2022 IEEE.

Original language	English
Title of host publication	2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
Publisher	IEEE
ISBN (Electronic)	978-1-6654-6618-9
ISBN (Print)	978-1-6654-6619-6
DOIs	https://doi.org/10.1109/PEDG54999.2022.9923219
Publication status	Published - 2022
Externally published	Yes
Event	IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2022) - Hybrid, Kiel, Germany Duration: 26 Jun 2022 → 29 Jun 2022 https://pedg2022.org/

Publication series

Name	IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG
ISSN (Print)	2329-5759
ISSN (Electronic)	2329-5767

Conference

Conference	IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2022)
Country/Territory	Germany
City	Kiel
Period	26/06/22 → 29/06/22
Internet address	https://pedg2022.org/

Funding

This work was supported by the Office of Naval Research U.S. under DUNS Code: 595886219.

Research Keywords

Cascaded H-bridge (CHB)
circulating current injection
compensation region of negative-sequence currents
multilevel converter
static compensator (STATCOM)
thin dc capacitor

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10.1109/PEDG54999.2022.9923219

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Rodriguez, E., Leyva, R., Farivar, G. G., Townsend, C. D., & Pou, J. (2022). Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation. In 2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) (IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG). IEEE. https://doi.org/10.1109/PEDG54999.2022.9923219

Rodriguez, Ezequiel ; Leyva, Ramon ; Farivar, Glen G. et al. / Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation. 2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG). IEEE, 2022. (IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG).

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title = "Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation",

abstract = "The cascaded H-bridge (CHB) low-capacitance static compensator (LC-STATCOM) with delta configuration has the capability to inject positive- and negative-sequence currents simultaneously. However, to maintain the energy balance among the converter arms, a fundamental-frequency zero-sequence current must flow within the delta ring. This may involve greater peak arm current values, which, in turn, limits the range of positive- and negative-sequence currents that the STATCOM can provide. In the LC-STATCOM, the inherent large twice-fundamental-frequency oscillation on the capacitor voltages also can bound its operating range. This paper analyses the operating range constraints in LC-STATCOMs and analytically derives its operating limits. Analytical derivations show that the allowable steady-state region corresponds to a polyhedron in Cartesian coordinates. The obtained polyhedra, for different desired performances, represent a new tool that shows the operating limits of STATCOMs and can assist in their design. The paper presents simulation results to corroborate that the operational limits correspond to those shown by the derived polyhedron. {\textcopyright} 2022 IEEE.",

keywords = "Cascaded H-bridge (CHB), circulating current injection, compensation region of negative-sequence currents, multilevel converter, static compensator (STATCOM), thin dc capacitor",

author = "Ezequiel Rodriguez and Ramon Leyva and Farivar, {Glen G.} and Townsend, {Christopher D.} and Josep Pou",

year = "2022",

doi = "10.1109/PEDG54999.2022.9923219",

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Rodriguez, E, Leyva, R, Farivar, GG, Townsend, CD & Pou, J 2022, Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation. in 2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG). IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG, IEEE, IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2022), Kiel, Schleswig-Holstein, Germany, 26/06/22. https://doi.org/10.1109/PEDG54999.2022.9923219

Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation. / Rodriguez, Ezequiel; Leyva, Ramon; Farivar, Glen G. et al.
2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG). IEEE, 2022. (IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation

AU - Rodriguez, Ezequiel

AU - Leyva, Ramon

AU - Farivar, Glen G.

AU - Townsend, Christopher D.

AU - Pou, Josep

PY - 2022

Y1 - 2022

N2 - The cascaded H-bridge (CHB) low-capacitance static compensator (LC-STATCOM) with delta configuration has the capability to inject positive- and negative-sequence currents simultaneously. However, to maintain the energy balance among the converter arms, a fundamental-frequency zero-sequence current must flow within the delta ring. This may involve greater peak arm current values, which, in turn, limits the range of positive- and negative-sequence currents that the STATCOM can provide. In the LC-STATCOM, the inherent large twice-fundamental-frequency oscillation on the capacitor voltages also can bound its operating range. This paper analyses the operating range constraints in LC-STATCOMs and analytically derives its operating limits. Analytical derivations show that the allowable steady-state region corresponds to a polyhedron in Cartesian coordinates. The obtained polyhedra, for different desired performances, represent a new tool that shows the operating limits of STATCOMs and can assist in their design. The paper presents simulation results to corroborate that the operational limits correspond to those shown by the derived polyhedron. © 2022 IEEE.

AB - The cascaded H-bridge (CHB) low-capacitance static compensator (LC-STATCOM) with delta configuration has the capability to inject positive- and negative-sequence currents simultaneously. However, to maintain the energy balance among the converter arms, a fundamental-frequency zero-sequence current must flow within the delta ring. This may involve greater peak arm current values, which, in turn, limits the range of positive- and negative-sequence currents that the STATCOM can provide. In the LC-STATCOM, the inherent large twice-fundamental-frequency oscillation on the capacitor voltages also can bound its operating range. This paper analyses the operating range constraints in LC-STATCOMs and analytically derives its operating limits. Analytical derivations show that the allowable steady-state region corresponds to a polyhedron in Cartesian coordinates. The obtained polyhedra, for different desired performances, represent a new tool that shows the operating limits of STATCOMs and can assist in their design. The paper presents simulation results to corroborate that the operational limits correspond to those shown by the derived polyhedron. © 2022 IEEE.

KW - Cascaded H-bridge (CHB)

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KW - compensation region of negative-sequence currents

KW - multilevel converter

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KW - thin dc capacitor

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M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 978-1-6654-6619-6

T3 - IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG

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Rodriguez E, Leyva R, Farivar GG, Townsend CD, Pou J. Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation. In 2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG). IEEE. 2022. (IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG). Epub 2022 Oct 25. doi: 10.1109/PEDG54999.2022.9923219

Negative-Sequence Current Range in Low-Capacitance Cascaded H-Bridge STATCOMs with Peak Arm Current Limitation

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