An Instantaneous Power Theory Extension for the Inter-Phase Power Imbalance Problem

Aguilera, RP; Acuna, P; Rojas, CA; Pou, J; Konstantinou, G; Watanabe, EH

An Instantaneous Power Theory Extension for the Inter-Phase Power Imbalance Problem

Aguilera, RP Acuna, P Rojas, CA Pou, J Konstantinou, G Watanabe, EH

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Publisher:: Institute of Electrical and Electronics Engineers (IEEE)
Publication Type:: Journal Article
Citation:: IEEE Transactions on Power Electronics, 2024, PP, (99), pp. 1-10
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Aguilera, RP
dc.contributor.author	Acuna, P
dc.contributor.author	Rojas, CA
dc.contributor.author	Pou, J
dc.contributor.author	Konstantinou, G
dc.contributor.author	Watanabe, EH
dc.date.accessioned	2024-09-05T10:43:14Z
dc.date.available	2024-09-05T10:43:14Z
dc.date.issued	2024-01-01
dc.identifier.citation	IEEE Transactions on Power Electronics, 2024, PP, (99), pp. 1-10
dc.identifier.issn	0885-8993
dc.identifier.issn	1941-0107
dc.identifier.uri	http://hdl.handle.net/10453/180670
dc.description.abstract	In grid-connected power converters, active and reactive power references are typically provided for calculating current and/or voltage references. This is generally achieved by using the standard instantaneous power theory (IPT). However, when a converter is required to operate with different per-phase power levels, the IPT cannot be applied to fully describe this inter-phase power interaction. To address this limitation, this work presents an interpretation of the inter-phase power imbalance problem, which enables the representation of the system as a combined electrical interaction between the unequal per-phase active powers on the inverter side and balanced power on the grid side. To achieve this, a Clarke transformation based on sequence order rotation is proposed. Thus, per-phase quadrature <inline-formula><tex-math notation="LaTeX">$\alpha \beta$</tex-math></inline-formula>-components can be obtained, allowing the instantaneous per-phase unbalanced power on the inverter side to be analytically derived. Based on this representation, an analytical expression of the instantaneous zero-sequence voltage (ZSV) is obtained. This ZSV allows one to extract unbalanced per-phase power on the inverter side while injecting balanced power on the grid side. A case study showing experimental results from a 10 kVA cascaded H-bridge converter applied to a scaled-down medium-voltage (MV) photovoltaic system are presented.
dc.language	en
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.relation.ispartof	IEEE Transactions on Power Electronics
dc.relation.isbasedon	10.1109/TPEL.2024.3397788
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.subject.classification	4008 Electrical engineering
dc.subject.classification	4009 Electronics, sensors and digital hardware
dc.title	An Instantaneous Power Theory Extension for the Inter-Phase Power Imbalance Problem
dc.type	Journal Article
utslib.citation.volume	PP
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	in_progress	*
dc.date.updated	2024-09-05T10:43:09Z
pubs.issue	99
pubs.publication-status	Published
pubs.volume	PP
utslib.citation.issue	99

Abstract:

In grid-connected power converters, active and reactive power references are typically provided for calculating current and/or voltage references. This is generally achieved by using the standard instantaneous power theory (IPT). However, when a converter is required to operate with different per-phase power levels, the IPT cannot be applied to fully describe this inter-phase power interaction. To address this limitation, this work presents an interpretation of the inter-phase power imbalance problem, which enables the representation of the system as a combined electrical interaction between the unequal per-phase active powers on the inverter side and balanced power on the grid side. To achieve this, a Clarke transformation based on sequence order rotation is proposed. Thus, per-phase quadrature

$\alpha \beta$

-components can be obtained, allowing the instantaneous per-phase unbalanced power on the inverter side to be analytically derived. Based on this representation, an analytical expression of the instantaneous zero-sequence voltage (ZSV) is obtained. This ZSV allows one to extract unbalanced per-phase power on the inverter side while injecting balanced power on the grid side. A case study showing experimental results from a 10 kVA cascaded H-bridge converter applied to a scaled-down medium-voltage (MV) photovoltaic system are presented.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/180670