Meny

Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Off-line analysis of the load response during large voltage variations

Författare:
Publiceringsår: 2004
Språk: Engelska
Sidor: 230-235
Publikation/Tidskrift/Serie: 2004 IEEE/PES Transmision and Distribution Conference and Exposition: Latin America
Dokumenttyp: Konferensbidrag
Förlag: IEEE

Sammanfattning

The load response during and after a severe fault is critical for transient stability. This risk increases with the presence of induction motors in the load area. This paper provides analysis of the load voltage characteristic under large voltage variations. Field measurements from a noneffectively earthed system, from phase-to-phase faults at the 50 kV-level in Sweden, have been used. The time-varying load parameters, resistance R(t) and reactance X(t), have been determined from measurements of phase-voltages and currents. Estimates of the active, reactive and apparent power have been calculated. The results show that commonly used models are inaccurate during large voltage variations. The load uncertainty critically increases with the size of the voltage changes since its nonlinear behavior accentuates for more system stressing conditions. This fact is more noticeable for the reactive load characteristic

Disputation

Nyckelord

  • Technology and Engineering
  • apparent power
  • reactive power
  • active power
  • currents measurements
  • phase-voltages measurements
  • reactance
  • resistance
  • time-varying load parameters
  • Sweden
  • phase-to-phase faults
  • noneffectively earthed system
  • field measurements
  • load voltage characteristic
  • off-line analysis
  • induction motors
  • power system dynamic stability
  • power system transient stability
  • load modeling
  • 50 kV
  • load uncertainty

Övriga

2004 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America
8-11 Nov. 2004
Sao Paulo, Brazil
Published
Yes
  • ISBN: 0-7803-8775-9

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen