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144157RECLASSIFY CONTINGENCY28/05/2026 06:29:40 AM
Reclassification of a Non-Credible Contingency Event: Mudgeeraba - Terranora No.757 110 kV line and Mudgeeraba - Terranora No.758 110 kV line in QLD1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: QLD1
Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV
Duration: 28/05/2026 06:29 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: QLD1
Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV
Duration: 28/05/2026 06:29 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
144156RECLASSIFY CONTINGENCY27/05/2026 09:49:30 PM
Cancellation of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 27/05/2026 21:49
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 144154
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 27/05/2026 21:49
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 144154
Auto-generated on behalf of Manager NEM Real Time Operations
144155RECLASSIFY CONTINGENCY27/05/2026 08:39:30 PM
Cancellation of a Non-Credible Contingency Event: Mudgeeraba - Terranora No.757 110 kV line and Mudgeeraba - Terranora No.758 110 kV line in QLD1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: QLD1
Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV
Cancellation time: 27/05/2026 20:39
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 144153
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: QLD1
Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV
Cancellation time: 27/05/2026 20:39
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 144153
Auto-generated on behalf of Manager NEM Real Time Operations
144154RECLASSIFY CONTINGENCY27/05/2026 05:45:15 PM
Reclassification of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 27/05/2026 17:45 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 27/05/2026 17:45 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
144153RECLASSIFY CONTINGENCY27/05/2026 05:34:33 PM
Reclassification of a Non-Credible Contingency Event: Mudgeeraba - Terranora No.757 110 kV line and Mudgeeraba - Terranora No.758 110 kV line in QLD1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: QLD1
Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV
Duration: 27/05/2026 17:34 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: QLD1
Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV
Duration: 27/05/2026 17:34 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
144152NON-CONFORMANCE27/05/2026 01:05:12 PM
NON-CONFORMANCE Region NSW1 Wednesday, 27 May 2026
AEMO ELECTRICITY MARKET NOTICE
NON-CONFORMANCE NSW1 Region Wednesday, 27 May 2026
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: TALWA1
Duration: 27/05/2026 13:00 to 27/05/2026 13:05
Amount: -60 MW
Constraint: NC-N_TALWA1
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE NSW1 Region Wednesday, 27 May 2026
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: TALWA1
Duration: 27/05/2026 13:00 to 27/05/2026 13:05
Amount: -60 MW
Constraint: NC-N_TALWA1
Auto-generated on behalf of Manager NEM Real Time Operations
144151MARKET SYSTEMS27/05/2026 10:54:54 AM
Initial - CHG0101141 - Planned Firewall maintenance in Norwest
Change Number: CHG0101141
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Local Area Network
Change Title: Planned Firewall maintenance in Norwest
Change Start Date & Time: 27/06/2026 10:00:00
Change End Date & Time: 27/06/2026 19:00:00
Outage Start Date & Time: 27/06/2026 10:00:00
Outage End Date & Time: 27/06/2026 19:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hour outage for participants who have established their VPN connection/s via the AEMO NSW datacenter termination point (202.44.78.10 for Policy Based VPN's or 202.44.78.12 for Route Based VPN) only - All L2L connections should be established to both QLD / NSW.
Note: Participants are encouraged to ensure their VPN connections are already established or are configured (as per AEMO best practice) to automatically failover to the alternate AEMO QLD datacenter termination point (202.44.76.10 or 202.44.76.12) prior to this scheduled outage. *** Failure to do so will impact connectivity to Marketnet Services ***.
B2B VPN - No impact is expected.
SSL VPN Participants: None expected as DNS entry will be updated to remove NSW IP.
GASHUB: No impact is expected
Other Impacts will have been communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any plan
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Local Area Network
Change Title: Planned Firewall maintenance in Norwest
Change Start Date & Time: 27/06/2026 10:00:00
Change End Date & Time: 27/06/2026 19:00:00
Outage Start Date & Time: 27/06/2026 10:00:00
Outage End Date & Time: 27/06/2026 19:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hour outage for participants who have established their VPN connection/s via the AEMO NSW datacenter termination point (202.44.78.10 for Policy Based VPN's or 202.44.78.12 for Route Based VPN) only - All L2L connections should be established to both QLD / NSW.
Note: Participants are encouraged to ensure their VPN connections are already established or are configured (as per AEMO best practice) to automatically failover to the alternate AEMO QLD datacenter termination point (202.44.76.10 or 202.44.76.12) prior to this scheduled outage. *** Failure to do so will impact connectivity to Marketnet Services ***.
B2B VPN - No impact is expected.
SSL VPN Participants: None expected as DNS entry will be updated to remove NSW IP.
GASHUB: No impact is expected
Other Impacts will have been communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any plan
144150MARKET SYSTEMS27/05/2026 10:51:34 AM
Initial - CHG0103899 - Replacement of Marketnet Firewall in Norwest
Change Number: CHG0103899
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Firewall
Change Title: Replacement of Marketnet Firewall in Norwest
Change Start Date & Time: 20/06/2026 09:00:00
Change End Date & Time: 20/06/2026 19:00:00
Outage Start Date & Time: 20/06/2026 09:00:00
Outage End Date & Time: 20/06/2026 17:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hour outage for participants who have established their VPN connection/s via the AEMO NSW datacenter termination point (202.44.78.10 for Policy Based VPN's or 202.44.78.12 for Route Based VPN) only - All L2L connections should be established to both QLD / NSW.
Note: Participants are encouraged to ensure their VPN connections are already established or are configured (as per AEMO best practice) to automatically failover to the alternate AEMO QLD datacenter termination point (202.44.76.10 or 202.44.76.12) prior to this scheduled outage. *** Failure to do so will impact connectivity to Marketnet Services ***.
B2B VPN - No impact is expected.
SSL VPN Participants: None expected as DNS entry will be updated to remove NSW IP.
GASHUB: A brief interuption of up to 60 seconds while services are failover from NSW to QLD Datacenter.
Other Impacts will have been communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activit
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Firewall
Change Title: Replacement of Marketnet Firewall in Norwest
Change Start Date & Time: 20/06/2026 09:00:00
Change End Date & Time: 20/06/2026 19:00:00
Outage Start Date & Time: 20/06/2026 09:00:00
Outage End Date & Time: 20/06/2026 17:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hour outage for participants who have established their VPN connection/s via the AEMO NSW datacenter termination point (202.44.78.10 for Policy Based VPN's or 202.44.78.12 for Route Based VPN) only - All L2L connections should be established to both QLD / NSW.
Note: Participants are encouraged to ensure their VPN connections are already established or are configured (as per AEMO best practice) to automatically failover to the alternate AEMO QLD datacenter termination point (202.44.76.10 or 202.44.76.12) prior to this scheduled outage. *** Failure to do so will impact connectivity to Marketnet Services ***.
B2B VPN - No impact is expected.
SSL VPN Participants: None expected as DNS entry will be updated to remove NSW IP.
GASHUB: A brief interuption of up to 60 seconds while services are failover from NSW to QLD Datacenter.
Other Impacts will have been communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activit
144149MARKET SYSTEMS27/05/2026 10:48:27 AM
Initial - CHG0106232 - Scheduled maintenance of Marketnet Firewall in Norwest
Change Number: CHG0106232
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Local Area Network
Change Title: Scheduled maintenance of Marketnet Firewall in Norwest
Change Start Date & Time: 30/05/2026 09:30:00
Change End Date & Time: 30/05/2026 17:00:00
Outage Start Date & Time: 30/05/2026 09:00:00
Outage End Date & Time: 30/05/2026 17:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hour outage for participants who have established their VPN connection/s via the AEMO NSW datacenter termination point (202.44.78.10 for Policy Based VPN's or 202.44.78.12 for Route Based VPN) only - All L2L connections should be established to both QLD / NSW.
Note: Participants are encouraged to ensure their VPN connections are already established or are configured (as per AEMO best practice) to automatically failover to the alternate AEMO QLD datacenter termination point (202.44.76.10 or 202.44.76.12) prior to this scheduled outage. *** Failure to do so will impact connectivity to Marketnet Services ***.
B2B VPN - No impact is expected.
SSL VPN Participants: None expected as DNS entry will be updated to remove NSW IP.
GASHUB: A brief interuption of up to 60 seconds while services are failover from NSW to QLD Datacenter.
Other Impacts will have been communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Local Area Network
Change Title: Scheduled maintenance of Marketnet Firewall in Norwest
Change Start Date & Time: 30/05/2026 09:30:00
Change End Date & Time: 30/05/2026 17:00:00
Outage Start Date & Time: 30/05/2026 09:00:00
Outage End Date & Time: 30/05/2026 17:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hour outage for participants who have established their VPN connection/s via the AEMO NSW datacenter termination point (202.44.78.10 for Policy Based VPN's or 202.44.78.12 for Route Based VPN) only - All L2L connections should be established to both QLD / NSW.
Note: Participants are encouraged to ensure their VPN connections are already established or are configured (as per AEMO best practice) to automatically failover to the alternate AEMO QLD datacenter termination point (202.44.76.10 or 202.44.76.12) prior to this scheduled outage. *** Failure to do so will impact connectivity to Marketnet Services ***.
B2B VPN - No impact is expected.
SSL VPN Participants: None expected as DNS entry will be updated to remove NSW IP.
GASHUB: A brief interuption of up to 60 seconds while services are failover from NSW to QLD Datacenter.
Other Impacts will have been communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.