Open AccessOn‐line short‐circuit current analysis and preventive control to extend equipment life
Author(s) -
Li Haoen,
Bose Anjan,
Zhang Yang
Publication year - 2013
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.2012.0181
Subject(s) - circuit breaker , line (geometry) , short circuit , distribution board , prospective short circuit current , reliability engineering , preventive action , current (fluid) , disconnector , electrical engineering , network analysis , engineering , transmission line , computer science , electrical equipment , voltage , computer security , led circuit , mathematics , geometry
Substation circuit breakers and other equipment are sized to withstand the maximum anticipated short‐circuit currents. Although the short‐circuit analysis used to design a substation takes into account the expected expansion of the network, over time the maximum short‐circuit current, especially for certain operating conditions, can exceed the circuit breaker ratings. As upgrading the equipment is expensive, the life of the present equipment can be extended if these violation conditions can be identified in real time and operational actions taken to mitigate them. In this study, the authors present a method for on‐line short‐circuit analysis and a method for determining preventive action using transmission line switching.