AEMO ELECTRICITY MARKET NOTICE

Cancellation - Reclassification of a Non Credible Contingency Event: H67 Calliope River - H8 Boyne Island 7145 132 kV Transmission line and the Gladstone Unit 1 in QLD region.

Refer to AEMO Electricity Market Notices 61368 and 61369

The cause of this non credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely.

AEMO has cancelled the reclassification for the simultaneous trip of H67 Calliope River - H8 Boyne Island 7145 132kV Transmission line and the Gladstone Unit 1 in the QLD region to be a credible contingency event from 1030 hrs 14/08/2018.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The MTPASA result published on 14 August 2018 identifies no Low Reserve Conditions over the next 2 years.

Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.

For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy

This notice supersedes Market Notice 63778 published on 7 August 2018.

Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.

For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
http://www.aemo.com.au/-/media/Files/Stakeholder_Consultation/Consultations/Electricity_Consultations/2016/EAAP/Reliability-Standard-Implementation-Guidelines.pdf

Forecasting
AEMO

AEMO ELECTRICITY MARKET NOTICE
Cancellation -Management of oscillations on the Terranora interconnector due to non-physical loss runs.
Refer to AEMO Electricity Market Notice 63866
The Terranora interconnector (N-Q-MNSP1) was constrained to halt the oscillating dispatch outcomes due to NEMDE non-physical loss runs.
Constraint set #N-Q-MNSP1_E was revoked at 0535 hrs 14/08/2018
This constraint set contains an equation with the following interconnector on the LHS.
N-Q-MNSP1

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Management of oscillations on the Terranora interconnector due to non-physical loss runs.
The Terranora interconnector (N-Q-MNSP1) was constrained to halt the oscillating dispatch outcomes due to NEMDE non-physical loss runs.
Constraint set #N-Q-MNSP1_E was invoked at 0240 hrs 14/08/2018 until further notice.
This constraint set contains an equation with the following interconnector on the LHS.
N-Q-MNSP1

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Armidale SVC outage NSW region - 13/08/2018

Unplanned outage of the Armidale SVC.
Constraint set N-AR_VC1 invoked from 2130 hrs until further notice.

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

Refer to the AEMO Network Outage Scheduler (NOS) for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The synchronous generating units expected to be synchronised in SA from 0030 hrs 15/08/2018 in Pre-dispatch are inadequate to maintain sufficient system strength in SA and hence a secure operating state.
In the absence of sufficient market response AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to operate or remain synchronised from 0030 hrs 15/08/2018 to maintain power system security in SA.
AEMO will estimate and publish the latest time at which AEMO would need to to intervene at a reasonably practicable time following the 1230 hrs predispatch run on the 14/08/2018

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE NSW1 Region Monday, 13 August 2018

AEMO declared a schedule generating unit non-conforming

Unit: STWF1
Duration: 13/08/2018 07:00 to 13/08/2018 07:30
Amount: 31 MW
Constraint: NC-N_STWF1

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE
Cancellation -Management of oscillations on the Terranora interconnector due to non-physical loss runs.
Refer to AEMO Electricity Market Notice 63861
The Terranora interconnector (N-Q-MNSP1) was constrained to halt the oscillating dispatch outcomes due to NEMDE non-physical loss runs.
Constraint set #N-Q-MNSP1_E was revoked at 0430 hrs 13/08/2018
This constraint set contains an equation with the following interconnector on the LHS.
N-Q-MNSP1

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Management of oscillations on the Terranora interconnector due to non-physical loss runs.
The Terranora interconnector (N-Q-MNSP1) was constrained to halt the oscillating dispatch outcomes due to NEMDE non-physical loss runs.
Constraint set #N-Q-MNSP1_E was invoked at 0150 hrs 13/08/2018 until further notice.
This constraint set contains an equation with the following interconnector on the LHS.
N-Q-MNSP1

Manager NEM Real Time Operations