Trip of No.1 Keilor Terminal Station 220kV Busbar on 8th October 2009
At approximately 15:00hrs on the 8th October 2009, No.1 220kV busbar at Keilor Terminal Station tripped which also resulted in the loss of B1 220/66kV transformer, reducing the number of transformers connected to Keilor Terminal Station 66kV busbars from three to two. During subsequent switching the loading on one of the remaining transformers increased to the point where its overload protection operated. This resulted in tripping of a transformer and the loss of 242 MW of load at the 66kV terminals.
This report has been prepared under clause 4.8.15 of the National Electricity Rules to assess the adequacy of the provision and response of facilities and services and the appropriateness of actions taken to restore or maintain power system security.
Information for this report has been provided by SP AusNet. Additional information has been obtained from AEMO’s Energy Management System.
For further information on this, please contact: Kin Onn Wong, Electricity System Operations Planning and Performance.
Power System Incident Report : Trip of No.1 Keilor Terminal Station 220kV Busbar on 8th October 2009 |
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