Open AccessPlanning the coordination of overcurrent relays for distribution systems considering network reconfiguration and load restoration
Author(s) -
Sharma Ankita,
Kiran Deep,
Panigrahi Bijaya K.
Publication year - 2018
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2017.1674
Subject(s) - overcurrent , relay , flexibility (engineering) , control reconfiguration , heuristic , fault (geology) , topology (electrical circuits) , engineering , state (computer science) , computer science , protective relay , reliability engineering , control theory (sociology) , voltage , power (physics) , electrical engineering , control (management) , embedded system , mathematics , algorithm , statistics , physics , quantum mechanics , artificial intelligence , seismology , geology
Installation of branch switches and tie‐lines in the distribution system provides the flexibility of load restoration during the occurrence of a fault, i.e. N− 1 state. These switches and tie‐lines change the network topology to isolate the fault and restore the unaffected network. As a consequence, the relays may delay or fail to operate for a possible incoming fault, i.e. N− 1−1 state; therefore, this study proposes an optimal relay setting of overcurrent relays subject to N− 1 and N− 1−1 states. Laterally, the proposed model maximises the load restoration such that the network remains radial. Also, it uses a meta‐heuristic algorithm to arrive at an optimal solution. Moreover, the optimal solution is validated using GE Multilin, model‐750/760 overcurrent relay in ETAP (industrial simulation software). The efficacy of the proposed method is examined on 33‐bus and a practical 14‐bus distribution system.