Market Notices

76538POWER SYSTEM EVENTS04/08/2020 06:34:20 PM

Non-credible contingency event - Tas region - 04/08/2020

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Tas region - 04/08/2020

At 1819 hrs the Creek Road - North Hobart No 1 and 2 110kV lines tripped.

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.

The cause of this non credible contingency event is not known at this stage.


Manager NEM Real Time Operations
76537RECLASSIFY CONTINGENCY04/08/2020 04:24:22 PM

Cancellation of a Non-Credible Contingency Event: Hazelwood - Rowville No.1 220kV line and Hazelwood - Rowville No.2 220kV line in VIC1 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: VIC1

Lines: Hazelwood - Rowville No.1 220kV and Hazelwood - Rowville No.2 220kV

Cancellation time: 04/08/2020 16:24

Constraint set(s) revoked:
V-HWRO_R_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE


Refer AEMO Electricity Market Notice 76536

Auto-generated on behalf of Manager NEM Real Time Operations
76536RECLASSIFY CONTINGENCY04/08/2020 03:23:27 PM

Reclassification of a Non-Credible Contingency Event: Hazelwood - Rowville No.1 220kV line and Hazelwood - Rowville No.2 220kV line in VIC1 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: VIC1

Lines: Hazelwood - Rowville No.1 220kV and Hazelwood - Rowville No.2 220kV

Duration: 04/08/2020 15:23 until further notice

Constraint set(s) invoked:
V-HWRO_R_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE


Auto-generated on behalf of Manager NEM Real Time Operations
76535RECLASSIFY CONTINGENCY04/08/2020 03:30:38 PM

Cancellation - Reclassification of a Non Credible Contingency Event: Loss of multiple generating units Vic region - 13/07/2020

AEMO ELECTRICITY MARKET NOTICE

Cancellation - Reclassification of a Non Credible Contingency Event: Loss of multiple generating units Vic region - 13/07/2020

Refer to MN 76289

Based on advice received from Energy Australia on the existence of an abnormal condition, AEMO now cancels the reclassification of the simultaneous loss of Yallourn W No.1 and No.3 generating units as a credible contingency event.

The nature of the abnormal condition was such that the concurrent loss of these two generating units was likely, in the event of a network fault close to Yallourn W power station.

The following constraint was invoked from 1100 hrs 13/07/2020 to 1530 hrs 04/08/2020

V-YWPS_13_N-2

The constraint set contain equations with the following interconnectors on the LHS

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

Manager NEM Real Time Operations
76534RESERVE NOTICE04/08/2020 03:20:25 PM

Cancellation of forecast Lack Of Reserve Level 1 (LOR1) in the Tasmania Region on 07/08/2020 and 10/08/2020

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the Tasmania region advised in AEMO Electricity Market Notice No. 76527 is cancelled at 1400 hrs 04/08/2020.

Manish Bhaskar
AEMO Operations
76533INTER-REGIONAL TRANSFER04/08/2020 12:59:20 PM

Inter-regional transfer limit variation - Wodonga - Jindera 060 330 kV Line - Vic Region - 04/08/2020

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Wodonga - Jindera 060 330 kV Line - Vic Region - 04/08/2020

A planned outage of Wodonga - Jindera 060 330 kV Line in the Vic region was rescheduled from 1100 hrs 04/08/2020 to 1900 hrs 04/08/2020.

The outage has been cancelled.

Constraint set(s) invoked:

I-JNWO_RADIAL
N-DPWG_63_X5
V-DBUSS_T

This constraint set(s) contains equations with the following interconnectors on the LHS.

N-Q-MNSP1
NSW1 - QLD1
T-V-MNSP1
V-SA
V-S-MNSP1
VIC1- NSW1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
76532RESERVE NOTICE04/08/2020 09:34:09 AM

Cancellation of Actual (LOR1) condition in the Tasmania region - 04/08/2020

AEMO ELECTRICITY MARKET NOTICE

Cancellation of Actual (LOR1) condition in the Tasmania region - 04/08/2020

The Actual LOR1 Condition in the Tasmania Region advised in AEMO Electricity Market Notice No.76529 is cancelled at 0900 hrs 04/08/2020

The Actual LOR1 was not genuine due to a SCADA error which has now been resolved.

Manager NEM Real Time Operations
76531MARKET SYSTEMS04/08/2020 09:18:49 AM

CHG0060245 : Planned System Outage to Declared Wholesale Gas Market Production Systems - Rescheduled

Market Notice

Change Number: CHG0060245

Notification issued to: Market Notice

Notification Type: Reschedule

Change Type: Normal

Service/ Component: Declared Wholesale Gas Market

Change Title: Planned System Outage to Declared Wholesale Gas Market Production Systems

Change Start Date & Time: 04/08/2020 17:30:00 AEST

Change End Date & Time: 04/08/2020 22:30:00 AEST

Outage Start Date & Time: 04/08/2020 18:30:00 AEST

Outage End Date & Time: 04/08/2020 21:00:00 AEST

Change Description:

Due to Operational Reasons CHG0060245 has been rescheduled. A future scheduled date will be provided in due course.

Environment: Production

Participant Impact and Requirements:

The following impacts are expected during the Site transfer:
- All access to the Declared Wholesale Gas Market Production Systems will be unavailable.
- All access to the MIBB for the NSW/ACT Retail Gas Market Participants will be unavailable.

Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
76530MARKET SYSTEMS04/08/2020 09:11:40 AM

AEMO Help Desk Bulletin No. 2509 : CHG0060401 : Planned Outage - MSATS PreProduction

Market Notice

Change Number: CHG0060401

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: MSATS - Consumer Administration and Transfer Solution(CATS)

Change Title: Planned Outage - MSATS PreProduction

Change Start Date & Time: 06/08/2020 13:00:00 AEST

Change End Date & Time: 06/08/2020 18:00:00 AEST

Outage Start Date & Time: 06/08/2020 14:00:00 AEST

Outage End Date & Time: 06/08/2020 18:00:00 AEST

Change Description:

MSATS Pre-Production will be unavailable for the duration of the maintenance window.

Environment: Pre-Production

Participant Impact and Requirements:

The MSATS Pre-Production environment will be unavailable during the outage window .

Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
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