unplanned outages from all causes including emergency events and extreme events forced outages on the prescribed network where notification to affected customers and/or AEMO was less than 24 hours (except where AEMO reschedules the outage after notification has been provided). Exclusions outages on assets that are not providing prescribed transmission service any unplanned outages shown to be primarily caused or initiated by a fault or other event on a third party system e.g. intertrip signal, — generator outage, customer installation any unplanned outages caused by a direction from emergency services or AEMO planned outages transient interruptions (less than one minute duration) interruptions of infrequent, occasional (such as pumping stations) where accurate estimate of load profiles is unreliable majeure events NOTE: the TNSP must provide a list to the AER each year of the events that the TNSP considers should be excluded from performance results, including reasons and how the event meets the relevant exclusion definition. The AER may reject the TNSP’s exclusion claims where it considers the TNSP has provided insufficient justification. Parameter 3 Average outage duration Sub-parameter average outage duration Unit of measure minutes Source of data TNSP outage reports and system Definition/formula formula: Aggregate duration (in minutes) of all unplanned outages with a loss of supply No. of events
unplanned outages from all causes including emergency events and extreme events forced outages on the prescribed network where notification to affected customers and/or AEMO was less than 24 hours (except where AEMO reschedules the outage after notification has been provided). Exclusions outages on assets that are not providing prescribed transmission service any unplanned outages shown to be primarily caused or initiated by a fault or other event on a third party system — e.g. intertrip signal, generator outage, customer installation any unplanned outages caused by a direction from emergency services or AEMO planned outages transient interruptions (less than one minute duration) interruptions of infrequent, occasional (such as pumping stations) where accurate estimate of load profiles is unreliable majeure events NOTE: the TNSP must provide a list to the AER each year of the events that the TNSP considers should be excluded from performance results, including reasons and how the event meets the relevant exclusion definition. The AER may reject the TNSP’s exclusion claims where it considers the TNSP has provided insufficient justification. Parameter 3 Average outage duration Sub-parameter average outage duration Unit of measure minutes Source of data TNSP outage reports and system Definition/formula formula: Aggregate duration (in minutes) of all unplanned outages with a loss of supply No. of events
AER%20-%20STPIS%20version%205%20%28superseded%29%20-%2017%20September%202015.docx