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2014-09-01 - Article/Dans un journal avec peer-review - Anglais - 12 page(s)

Firouz Yousef, Farhadkhani Somayeh, Lobry Jacques , Vallée François , Khakpour Ahmed, Durieux Olgan, "Numerical Comparison of the Effects of Different Types of Distributed Generation Units on Overcurrent Protection Systems in MV Distribution Grids" in Renewable Energy, 69, September 2014, 271-283

  • Edition : Elsevier (United Kingdom)
  • Codes CREF : Sciences de l'ingénieur (DI2000), Electricité courants forts (DI2400)
  • Unités de recherche UMONS : Physique Générale (F901), Génie Electrique (F101)
  • Instituts UMONS : Institut de Recherche en Energétique (Energie)

Abstract(s) :

(Anglais) Integration of distributed generation (DG) units into the traditional distribution networks causes several significant changes in their characteristics like power flow direction, voltage profile and short circuit level. Therefore, the currently used control and protection strategies can no longer work properly and they have to be revised and modified. One of the most important issues is relay’s protection miscoordination. For a reliable and efficient protection system, both transient and steady states of faulty current contributions should be considered. In this paper, the exact model of photovoltaic generators and of three different types of wind generators including their interfaces with grid and control system (PSMG with full size converter, DFIG with partial size, commonly met on Belgian grids, and directly connected IG) are presented. Afterwards, the fault currents generated by different sizes of the mentioned generators are compared with those ones that are produced by ideal models of DGs in the same conditions. The PSCAD software is used for the simulation of transient contributions of DGs under faulty conditions in a medium voltage test distribution network.