Autors: Hadzhiev, I. S., Malamov, D. V., Georgiev A. P.
Title: Analysis of earth faults in a wind farm integrated into the electric power system
Keywords: wind farm, earth fault, electric power system, higher harmonics

Abstract: The aim of this paper is to investigate the processes of earth faults occurrence in a wind farm network, integrated into the electric power system. The wind power farm is realized with squirrel-cage induction generators (SCIG). Each generator has a 0.69/21kV step-up transformer. The connection of the wind power farm to the electric power system is implemented through a step-up substation with a single 21/115kV transformer. The star center of the transformer 21kV winding is grounded by means of a 40 ohm resistor. A synthesized in MatLab/Simulink computer model investigates the processes of earth faults occurrence in the medium-voltage (MV) network of the wind farm. Results have been obtained, concerning the influence of the earth fault location on the transient voltages and currents at both rated torque of the generators and no-operating generators.

References

  1. Söder L and Ackermann T 2005 Wind Power in Power Systems:An Introduction Ackermann T. (Ed), Wind Power in Power Systems, John Wiley & Sons, Ltd, Chichester, England, pp. 25-52.
  2. Noureldeen O, Abdelwahab M and Rashad A 2011 Operation of Hybrid Wind Farm Based on SCIG and DFIG Under Gust Wind Speed Journal of Engineering Sciences, Assiut University, Vol. 39, No 3, pp.637-648.
  3. Umashankar S, Kothari D P and Mangayarkarasi P 2010 Wind Turbine Modelling of a Fully-Fed Induction Machine S. M. Muyeen (ed.), Wind Power, Intech, Olajnica 19/2, 32000 Vukovar, Croatia, pp. 93-112.
  4. Gevorgian V and Muljadi E 2010 Wind Power Plant Short Circuit Current Contribution for Different Fault and Wind Turbine Topologies The 9th Annual International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Power Plants, Québec, Canada.
  5. Hansen P, Оstergaard J and Christiansen J S 2007 System grounding of wind farm medium voltage cable grids Nicolaos Cutululis and Poul Sørensen (eds.), Proceedings Nordic Wind Power Conference NWPC’2007, Roskilde, Denmark, pp. 164-168.

Issue

IOP Conference Series: Materials Science and Engineering, vol. 878, issue 1, pp. 1-8, 2020, United Kingdom, Institute of Physics Publishing, ISSN 1757-8981

Copyright Institute of Physics Publishing

Вид: статия в списание, публикация в реферирано издание, индексирана в Scopus