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REMONT PRUGA I POSLJEDICE
UGRADNJE TRAČNICA TIPA UIC 60
NA ELEKTRIČNI PRORAČUN
Pruga Sarajevo-Ploče kolosijeka
1435 mm, D4 kategorije (8 t/m; 22,5 t/osovini)
dužina 193,152 km.
Projektno rješenje tipa tračnice: S-49
Projektno rješenje tračnica: UIC 60
Osovinsko opterećenje - 225 kN
Brzina 100 km/h.
Prvobitni projekti elektrifikacije iz 1967:
proračuni za tračnice tipa S 49
Potrebno je provjeriti impedanciju kontaktne
mreže, vrijednost struje kratkog spoja,
redukcijski faktor tračnica, te na osnovu ovih
podataka procijeniti opasnosti na pruzi
ELEKTRIČNI PRORAČUN
Proračun impedancija
Ekvivalentna shema sustava električne vuče 25 kV; 50 Hz
napon kontaktne mreže [V]
snaga dvopolnog kratkog spoja na sabirnicama
elektrovučne podstanice [VA]
Unutarnji podužni induktivni otpor tračnice S-49:
:
Spoljašnji podužni induktivni otpor tračnice:
:
radijus poprečnog presjeka ekvivalentnog
provodnika
P - perimetar tračnice [cm]
Međusobna impedancija tračnica:
-razmak između težišta tračnica
Proračun impedancije tračnice UIC 60
A. Dolara, S. Leva Using Finite Elements Methods and Complex Magnetic
Permeability
A. Mariscotti, P. Pozzobon, Measurement of the internal impedance of
traction rails at 50 Hz
Ovisnost podužnog aktivnog otpora tračnice tipa UIC 60 od intenziteta struje i frekvencije .
Ovisnost podužne unutarnje induktivnosti tračnice tipa UIC
60 od intenziteta struje i frekvencije .
Podužni aktivni otpor tračnice UIC 60 za f=50 Hz:
Podužna unutarnja induktivnost tračnice UIC 60 za 50 Hz
I=1000 A
Ovisnost ekvivalentne podužne impedancije kontaktne
mreže sa tračnicama S-49 i UIC 60 od udaljenosti
Ovisnost argumenta ekvivalentne podužne impedancije od udaljenosti
za tračnice S-49 i UIC 60.
Redukcijski faktor tračnica predstavlja stupanj smanjenja
inducirane elektromotorne sile inducirane strujom u
voznom vodu
Proračun redukcijskog faktora tračnica
– podužna međusobna impedancija
kontura vozni vod- povratni strujni krug
- podužna impedancija povratnog
provodnika
- koeficijent prostiranja tračnica
- podužna admitancija kolosijeka
Ovisnost struje kratkog spoja od udaljenosti za
tračnice S-49 i UIC 60.
Rezultati proračuna struje kratkog spoja
Rezultati proračuna redukcijskog faktora tračnica
Redukcijski faktor željezničkih tračnica S-49 i UIC 60
jednokolosiječne pruge sa dvije povratne tračnice.
ZAKLJUČAK
Ekvivalentna podužna impedancija kontaktne mreže nakon
remonta pruge sa tračnicama UIC 60 neznatno je niža od
vrijednosti sa tračnicama S-49 prije remonta.
Neznatno su više vrijednosti struja kratkih spojeva, te releje
prekostrujne zaštite nije potrebno prepodešavati.
Fazni kut ekvivalentne podužne impedancije kontaktne
mreže sa tračnicama UIC 60 nije se znatno promijenio,
te nije potrebno prepodešavanje releja
distantne zaštite.
Redukcijski faktor tračnica tipa UIC 60 je niži od redukcijkog
faktora tračnica tipa S-49 za približno 10% to je i sigurnost
veća, jer su i inducirani naponi u strujnim krugovima uz
prugu niži za približno 10% nego ranije.
HVALA NA PAŽNJI

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TRACK OVERHAUL AND IMPACT OF USING OF UIC 60 RAILS ON ELECTRICAL CALCULATIONS

  • 1. REMONT PRUGA I POSLJEDICE UGRADNJE TRAČNICA TIPA UIC 60 NA ELEKTRIČNI PRORAČUN
  • 2. Pruga Sarajevo-Ploče kolosijeka 1435 mm, D4 kategorije (8 t/m; 22,5 t/osovini) dužina 193,152 km. Projektno rješenje tipa tračnice: S-49
  • 3. Projektno rješenje tračnica: UIC 60 Osovinsko opterećenje - 225 kN Brzina 100 km/h. Prvobitni projekti elektrifikacije iz 1967: proračuni za tračnice tipa S 49 Potrebno je provjeriti impedanciju kontaktne mreže, vrijednost struje kratkog spoja, redukcijski faktor tračnica, te na osnovu ovih podataka procijeniti opasnosti na pruzi
  • 4. ELEKTRIČNI PRORAČUN Proračun impedancija Ekvivalentna shema sustava električne vuče 25 kV; 50 Hz napon kontaktne mreže [V] snaga dvopolnog kratkog spoja na sabirnicama elektrovučne podstanice [VA]
  • 5. Unutarnji podužni induktivni otpor tračnice S-49: : Spoljašnji podužni induktivni otpor tračnice: : radijus poprečnog presjeka ekvivalentnog provodnika P - perimetar tračnice [cm]
  • 6. Međusobna impedancija tračnica: -razmak između težišta tračnica
  • 7. Proračun impedancije tračnice UIC 60 A. Dolara, S. Leva Using Finite Elements Methods and Complex Magnetic Permeability A. Mariscotti, P. Pozzobon, Measurement of the internal impedance of traction rails at 50 Hz Ovisnost podužnog aktivnog otpora tračnice tipa UIC 60 od intenziteta struje i frekvencije .
  • 8. Ovisnost podužne unutarnje induktivnosti tračnice tipa UIC 60 od intenziteta struje i frekvencije .
  • 9. Podužni aktivni otpor tračnice UIC 60 za f=50 Hz: Podužna unutarnja induktivnost tračnice UIC 60 za 50 Hz I=1000 A
  • 10. Ovisnost ekvivalentne podužne impedancije kontaktne mreže sa tračnicama S-49 i UIC 60 od udaljenosti
  • 11. Ovisnost argumenta ekvivalentne podužne impedancije od udaljenosti za tračnice S-49 i UIC 60.
  • 12. Redukcijski faktor tračnica predstavlja stupanj smanjenja inducirane elektromotorne sile inducirane strujom u voznom vodu Proračun redukcijskog faktora tračnica – podužna međusobna impedancija kontura vozni vod- povratni strujni krug - podužna impedancija povratnog provodnika - koeficijent prostiranja tračnica - podužna admitancija kolosijeka
  • 13. Ovisnost struje kratkog spoja od udaljenosti za tračnice S-49 i UIC 60. Rezultati proračuna struje kratkog spoja
  • 14. Rezultati proračuna redukcijskog faktora tračnica Redukcijski faktor željezničkih tračnica S-49 i UIC 60 jednokolosiječne pruge sa dvije povratne tračnice.
  • 15. ZAKLJUČAK Ekvivalentna podužna impedancija kontaktne mreže nakon remonta pruge sa tračnicama UIC 60 neznatno je niža od vrijednosti sa tračnicama S-49 prije remonta. Neznatno su više vrijednosti struja kratkih spojeva, te releje prekostrujne zaštite nije potrebno prepodešavati. Fazni kut ekvivalentne podužne impedancije kontaktne mreže sa tračnicama UIC 60 nije se znatno promijenio, te nije potrebno prepodešavanje releja distantne zaštite. Redukcijski faktor tračnica tipa UIC 60 je niži od redukcijkog faktora tračnica tipa S-49 za približno 10% to je i sigurnost veća, jer su i inducirani naponi u strujnim krugovima uz prugu niži za približno 10% nego ranije.