Applicability of true voltage unbalance approximation formula for unbalance monitoring in LV networks with single-phase distributed generation

Ognjen Gagrica, Tadeusz Uhl, Phuong H. Nguyen, J. F.G. Cobben

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)

Samenvatting

In the hierarchy of power transmission and distribution systems, the three-phase LV distribution networks are most susceptible to voltage unbalance (VU). The main causes are large presence of randomly distributed single-phase loads and, following the latest trends, the increasing presence of single-phase distributed generators. Most widely accepted VU calculation is based on percentile ratio of negative and positive sequence voltage (voltage unbalance factor, VUF). Obtaining sequence voltages is a complex domain calculation and requires simultaneous sampling of three-phase voltages and angles. This is why the existing VU monitoring and mitigation solutions are dominantly three-phase. Without an additional three-phase aggregation device, there is an inherent gap in VU monitoring for single-phase loads and generators. In this paper, the data concentrators for a growing PV micro-inverter niche are identified as an infrastructure that could be exploited to somewhat close this gap. Due to potential technical limitations of PV data concentrators, a non-complex VUF approximation formula is tested as a "light" calculation alternative, by comparing it against conventional VUF. The comparison results are obtained from Monte Carlo load flow simulation for an unbalanced LV network.

Originele taal-2Engels
TitelSMARTGREENS 2016 - Proceedings of the 5th International Conference on Smart Cities and Green ICT Systems
Plaats van productiePiscataway
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's1-7
Aantal pagina's7
ISBN van elektronische versie978-989-758-234-9
ISBN van geprinte versie978-1-5090-5896-9
StatusGepubliceerd - 1 jan 2016
Evenement5th International Conference on Smart Cities and Green ICT Systems, SMARTGREENS 2016 - Rome, Italië
Duur: 23 apr 201625 apr 2016

Congres

Congres5th International Conference on Smart Cities and Green ICT Systems, SMARTGREENS 2016
Land/RegioItalië
StadRome
Periode23/04/1625/04/16

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