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Impact of voltage phase angle changes on low-voltage ride-through performance of small scale hydro DG units

Impact of voltage phase angle changes on low-voltage ride-through performance of small scale hydro DG units

Kategori
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Sammendrag
Computer simulations of a simplified radial 132, 66 and 22 kV system including a 5 MVA hydro power unit, has been performed in order to assess the hydro unit's fault-ride-through (FRT) capability, with special emphasis on the Critical Clearing Time (CCT) of the unit. The results show that there is a significant difference in CCT when the disturbance reflects a realistic fault in the system, i.e. a fault that reflects changes in both voltage magnitude and phase angle, compared with a disturbance for which only the change in voltage magnitude is taken into account. Since requirements regarding fault-ride-through (FRT) capability found in most of today's national grid codes are defined via a specified transient voltage vs. time disturbance profile, the paper therefore suggests that these requirements should be extended to include also corresponding phase angle vs. time disturbance profiles
Oppdragsgiver
  • Research Council of Norway (RCN) / 190994
Språk
Engelsk
Forfatter(e)
  • Trond Toftevaag
  • Traian Nicolae Preda
  • Kjetil Uhlen
Institusjon(er)
  • SINTEF Energi AS / Energisystemer
  • Norges teknisk-naturvitenskapelige universitet
År
Forlag
CIRED - Congrès International des Réseaux Electriques de Distribution
Bok
CIRED 2013 Electricity Distribution Systems for a Sustainable Future
ISBN
9781849197328