Low voltage systems are unbalanced networks where a significant share of the users is single-phase connected, so a multi-phase system needs to be considered in order to assess the mutual influence of the different phases. The presence of single-phase unevenly distributed users, leads to unbalances in the power flow on the three phases. This issue is emphasised considering the presence of local single-phase generators. This study presents a generalised method for transformers modelling in any multi-conductor grid representation in order to allow the analysis on unbalanced networks such as low-voltage distribution systems. The method, based on an incidence matrix approach, is proposed to represent any network object involving mutual connections among the phases, once the impedances for each single-phase equivalent circuit are known. Some application examples validate the approach and illustrate how to numerically realise the model.

Generalised transformer modelling for power flow calculation in multi-phase unbalanced networks

Coppo, Massimiliano;Bignucolo, Fabio;Turri, Roberto
2017

Abstract

Low voltage systems are unbalanced networks where a significant share of the users is single-phase connected, so a multi-phase system needs to be considered in order to assess the mutual influence of the different phases. The presence of single-phase unevenly distributed users, leads to unbalances in the power flow on the three phases. This issue is emphasised considering the presence of local single-phase generators. This study presents a generalised method for transformers modelling in any multi-conductor grid representation in order to allow the analysis on unbalanced networks such as low-voltage distribution systems. The method, based on an incidence matrix approach, is proposed to represent any network object involving mutual connections among the phases, once the impedances for each single-phase equivalent circuit are known. Some application examples validate the approach and illustrate how to numerically realise the model.
File in questo prodotto:
File Dimensione Formato  
Generalised transformer modelling for power flow calculation in multi-phase unbalanced networks.pdf

accesso aperto

Tipologia: Published (publisher's version)
Licenza: Creative commons
Dimensione 2.05 MB
Formato Adobe PDF
2.05 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3244194
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 10
social impact