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Sökning: WFRF:(Barakou Fani)

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1.
  • Barakou, Fani, et al. (författare)
  • Downstream network modeling for switching transients in EHV networks containing cables
  • 2017
  • Ingår i: IEEE PES PowerTech Manchester 2017: towards and beyond sustainable energy systems, 2017. - Piscataway, NJ : Institute of Electrical and Electronics Engineers (IEEE). - 9781509042371
  • Konferensbidrag (refereegranskat)abstract
    • For the study of switching transients in Extra High Voltage (EHV) networks it is common practice to model a relatively small part of the EHV network. The downstream network is either disregarded or modeled as a parallel RC or RL circuit, based on the powerflow, directly at the secondary side of the transmission transformer. In this paper an investigation for the extent and model type of the downstream network (below 380 kV) is performed. A detailed model for an example downstream network is developed. Different simplifications and equivalent models are compared in frequency domain and in time domain, during cable energization. The impact of the lower voltage network on both the maximum overvoltage and the harmonic content during energization is assessed. Moreover, components that are of major importance are identified and proper equivalent models for the downstream network are proposed. Simulation results show that in particular the type of the 150 kV network (underground cable or overhead line) affects greatly both the maximum overvoltage and the harmonic content during energization. On the other hand, the parameters of end customer loads have only minor effect.
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2.
  • Barakou, Fani, et al. (författare)
  • Impact of Load Modeling on the Harmonic Impedance seen from the Transmission Network
  • 2016
  • Ingår i: 17th International Conference on Harmonics and Quality of Power. - Piscataway, NJ. - 9781509037926 ; , s. 283-288
  • Konferensbidrag (refereegranskat)abstract
    • Traditionally when studying harmonics at transmis-sion system level the medium and low voltage grid is modeledwith either an equivalent short-circuit impedance or a fixed PQload (based on the powerflow) directly at the secondary side ofthe transmission transformer. However the recent replacement ofconventional loads with electronic loads as well as the extendeduse of power electronics in LV level will result in reductionof damping and increase of household capacitance which maychange the harmonic impedance seen from the upstream network(MV or HV) both in the dominant frequency and magnitude.In this paper a HV feeder is modeled in detail starting fromthe transmission transformer up to the household equipmentto investigate whether changes in the type of load affect theimpedance seen from the HV. The simulations are performedusing software package PSCAD/EMTDC.
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  • Resultat 1-2 av 2
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konferensbidrag (2)
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refereegranskat (2)
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Bollen, Math (2)
Barakou, Fani (2)
Mousavi-Gargari, S. (2)
Wouters, P.A.A.F. (1)
Steenis, E.F. (1)
Lennerhag, Oscar, 19 ... (1)
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Wouters, Peter A A F (1)
Steennis, E. Fred (1)
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