A Modification of Newton–Raphson Power Flow for Using in LV Distribution System

The Newton–Raphson (NR) method is still frequently applied for computing load flow (LF) due to its precision and quadratic convergence properties. To compute LF in a low voltage distribution system (LVDS) with unbalanced topologies, each branch model in the LVDS can be simplified by defining the neu...

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Autores principales:	Anuwat Chanhome, Surachai Chaitusaney
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	branch model distribution system Newton–Raphson method unbalanced Technology T
Acceso en línea:	https://doaj.org/article/2e2cd527ba56436086c1191201987ec6
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spelling	oai:doaj.org-article:2e2cd527ba56436086c1191201987ec62021-11-25T17:27:07ZA Modification of Newton–Raphson Power Flow for Using in LV Distribution System10.3390/en142276001996-1073https://doaj.org/article/2e2cd527ba56436086c1191201987ec62021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7600https://doaj.org/toc/1996-1073The Newton–Raphson (NR) method is still frequently applied for computing load flow (LF) due to its precision and quadratic convergence properties. To compute LF in a low voltage distribution system (LVDS) with unbalanced topologies, each branch model in the LVDS can be simplified by defining the neutral and ground voltages as zero and then using Kron’s reduction to transform into a 3 × 3 branch matrix, but this decreases accuracy. Therefore, this paper proposes a modified branch model that is also reduced into a 3 × 3 matrix but is derived from the impedances of the phase-A, -B, -C, neutral, and ground conductors together with the grounding resistances, thereby increasing the accuracy. Moreover, this paper proposes improved LF equations for unbalanced LVDS with both PQ and PV nodes. The improved LF equations are based on the polar-form power injection approach. The simulation results show the effectiveness of the modified branch model and the improved LF equations.Anuwat ChanhomeSurachai ChaitusaneyMDPI AGarticlebranch modeldistribution systemNewton–Raphson methodunbalancedTechnologyTENEnergies, Vol 14, Iss 7600, p 7600 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	branch model distribution system Newton–Raphson method unbalanced Technology T
spellingShingle	branch model distribution system Newton–Raphson method unbalanced Technology T Anuwat Chanhome Surachai Chaitusaney A Modification of Newton–Raphson Power Flow for Using in LV Distribution System
description	The Newton–Raphson (NR) method is still frequently applied for computing load flow (LF) due to its precision and quadratic convergence properties. To compute LF in a low voltage distribution system (LVDS) with unbalanced topologies, each branch model in the LVDS can be simplified by defining the neutral and ground voltages as zero and then using Kron’s reduction to transform into a 3 × 3 branch matrix, but this decreases accuracy. Therefore, this paper proposes a modified branch model that is also reduced into a 3 × 3 matrix but is derived from the impedances of the phase-A, -B, -C, neutral, and ground conductors together with the grounding resistances, thereby increasing the accuracy. Moreover, this paper proposes improved LF equations for unbalanced LVDS with both PQ and PV nodes. The improved LF equations are based on the polar-form power injection approach. The simulation results show the effectiveness of the modified branch model and the improved LF equations.
format	article
author	Anuwat Chanhome Surachai Chaitusaney
author_facet	Anuwat Chanhome Surachai Chaitusaney
author_sort	Anuwat Chanhome
title	A Modification of Newton–Raphson Power Flow for Using in LV Distribution System
title_short	A Modification of Newton–Raphson Power Flow for Using in LV Distribution System
title_full	A Modification of Newton–Raphson Power Flow for Using in LV Distribution System
title_fullStr	A Modification of Newton–Raphson Power Flow for Using in LV Distribution System
title_full_unstemmed	A Modification of Newton–Raphson Power Flow for Using in LV Distribution System
title_sort	modification of newton–raphson power flow for using in lv distribution system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2e2cd527ba56436086c1191201987ec6
work_keys_str_mv	AT anuwatchanhome amodificationofnewtonraphsonpowerflowforusinginlvdistributionsystem AT surachaichaitusaney amodificationofnewtonraphsonpowerflowforusinginlvdistributionsystem AT anuwatchanhome modificationofnewtonraphsonpowerflowforusinginlvdistributionsystem AT surachaichaitusaney modificationofnewtonraphsonpowerflowforusinginlvdistributionsystem
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A Modification of Newton–Raphson Power Flow for Using in LV Distribution System

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