Market Notices

82214MARKET SYSTEMS18/01/2021 09:58:54 AM

CHG0062443 : Planned maintenance on core network infrastructure in the AEMO Sydney datacentre

Change Number: CHG0062443

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Internet

Change Title: Planned maintenance on core network infrastructure in the AEMO Sydney datacentre

Change Start Date & Time: 23/01/2021 07:30:00 AEST

Change End Date & Time: 23/01/2021 15:30:31 AEST

Outage Start Date & Time: 23/01/2021 08:30:38 AEST

Outage End Date & Time: 23/01/2021 11:30:00 AEST

Change Description:

Planned maintenance on core network infrastructure in the AEMO Sydney datacentre.

Environment: Production

Participant Impact and Requirements:

The following impacts are expected to participant connectivity during this planned outage:

IPWAN Participants - Nil

Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hours to participants who have established their VPN connections via the AEMO NSW datacenter termination point (202.44.78.10)
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) prior to this scheduled outage.

B2B VPN - Up to 4 hours outage to TNSPs with B2B VPN to AEMO NSW Datacentre.

SSL VPN Participants: SSLVPN users may experience an outage as services are moved to the alternate AEMO VPN access point.

Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
     
82213INTER-REGIONAL TRANSFER18/01/2021 04:54:57 AM

Cancellation - Inter-regional transfer limit variation: Hazelwood - South Morang No.2 500 kV Line (Vic) - Voltage Control

AEMO ELECTRICITY MARKET NOTICE

Cancellation - Inter-regional transfer limit variation: Hazelwood - South Morang No.2 500 kV Line (Vic) - Voltage Control

Refer AEMO Electricity Market Notice 82197

The Hazelwood - South Morang No.2 500 kV Line has been returned to service.

The following constraint set was revoked from 0450 hrs 18/01/2021

V-HWSM

The constraint set contains equations with the following interconnectors on the LHS.

T-V-MNSP1
V-S-MNSP1
V-SA
VIC1-NSW1

Manager NEM Real Time Operations

     
82212RECLASSIFY CONTINGENCY17/01/2021 10:14:55 PM

Cancellation of a Non-Credible Contingency Event: Tarong - Chinchilla No.7168 132 kV line and Tarong - Chinchilla No.7183 132 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: Tarong - Chinchilla No.7168 132 kV and Tarong - Chinchilla No.7183 132 kV

Cancellation time: 17/01/2021 22:14

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 82200

Auto-generated on behalf of Manager NEM Real Time Operations
     
82211RECLASSIFY CONTINGENCY17/01/2021 07:29:55 PM

Cancellation of a Non-Credible Contingency Event: Condabri Nth - Condabri Central 7400 132kV line and Condabri Nth - Condabri Central 7401 132kV 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: Condabri Nth - Condabri Central 7400 132kV and Condabri Nth - Condabri Central 7401 132kV

Cancellation time: 17/01/2021 19:29

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 82210

Auto-generated on behalf of Manager NEM Real Time Operations
     
82210RECLASSIFY CONTINGENCY17/01/2021 05:24:30 PM

Reclassification of a Non-Credible Contingency Event: Condabri Nth - Condabri Central 7400 132kV line and Condabri Nth - Condabri Central 7401 132kV 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: Condabri Nth - Condabri Central 7400 132kV and Condabri Nth - Condabri Central 7401 132kV

Duration: 17/01/2021 17:24 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations
     
82209MARKET INTERVENTION17/01/2021 04:33:06 PM

Direction - SA Region - 17/01/2021

AEMO ELECTRICITY MARKET NOTICE.

Direction - SA Region - 17/01/2021

In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).

The direction was necessary to maintain the power system in a secure operating state.

AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided. A further market notice will be issued when all directions related to this requirement have been cancelled.

The issue of the direction commences an AEMO intervention event. AEMO declares all dispatch intervals during the event to be intervention dispatch intervals, commencing from the interval ending 1635 hrs on 17/01/2021.

Intervention pricing does not apply to this AEMO intervention event.

Manager NEM Real Time Operations
     
82206MARKET INTERVENTION17/01/2021 08:01:13 PM

Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 12/01/2021

AEMO ELECTRICITY MARKET NOTICE

Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 12/01/2021

Refer Market Notice 82107

The AEMO Intervention Event and all associated directions are cancelled from 2000 hrs 17/01/2021

Manager NEM Real Time Operations
     
82205INTER-REGIONAL TRANSFER17/01/2021 03:14:36 PM

Inter-Regional Transfer limit variation Greenbank SVC (QLD)

AEMO ELECTRICITY MARKET NOTICE

Inter-Regional Transfer limit variation Greenbank SVC (QLD)

At 1503 hrs there was an unplanned outage of the Greenbank SVC in the Queensland region.

Constraint set Q-GB_VC invoked from 1510 hrs 17/01/2020 until further notice.

This constraint set contains equations with the following interconnectors on the LHS.
NSW1-QLD1
N-Q-MNSP1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
     
82202MARKET INTERVENTION17/01/2021 03:04:46 PM

Possible intervention to manage power system security in South Australia (SA) Region

AEMO ELECTRICITY MARKET NOTICE

Possible intervention to manage power system security in South Australia (SA) Region

The synchronous generating units expected to be synchronised in SA from 0930 hrs to 1700 hrs 18/01/2021 in Pre-dispatch published at 1500 hrs 17/01/2021are inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO currently estimates that, in the absence of sufficient market response by 1630 hrs 17/01/2021, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to synchronise or remain synchronised to maintain power system security in SA.

Manager NEM Real Time Operations
     
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