AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation: Hazelwood - Rowville No.3 500kV Line (VIC) - Voltage Control - 30 Mar 2017

The Hazelwood - Rowville No.3 500kV Line has been de-energised to manage voltages in the VIC region.

The following constraint set was invoked at 0205 hrs

V-X_HWSM_HWRO3

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


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

Refer to AEMO Network Outage Schedule for further details.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation: Hazelwood - South Morang No.1 500kV Line (VIC) - Voltage Control - 30 March 2017

The Hazelwood - South Morang No.1 500kV Line has been de-energised to manage voltages in the VIC region.

The following constraint set was invoked at 0035 hrs

V-HWSM

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

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

Refer to AEMO Network Outage Schedule for further details.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event: Bouldercombe - Rockhampton 7108 and Bouldercombe - Egans Hill 7221 132 kV Lines in Queensland due to Lightning.

Lightning is occurring near the Bouldercombe - Rockhampton 7108 and Bouldercombe - Egans Hill 7221 132 kV Lines.

AEMO considers the simultaneous trip of those circuits to now be more likely.

Therefore AEMO has reclassified this as a credible contingency event from 2350 hrs 29/03/17 until further notice.


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation of the Reclassification of a Non-Credible Contingency Event: Collinsville North - Newlands 7121 and Collinsville North - Stoney Ck 7306 132 kV Lines in Qld Region due to Lightning.

Refer to AEMO Electricity Market Notice 58292

There is no longer any lightning activity in the vicinity of the Collinsville North - Newlands 7121 and Collinsville North - Stoney Ck 7306 132 kV Lines
AEMO has cancelled the reclassification of the simultaneous trip of those circuits as a credible contingency event from 2210 hrs.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation of the Reclassification of a Non-Credible Contingency Event: Ross - Chalumbin 857 and 858 275kV Lines in Queensland due to Lightning

Refer to AEMO Electricity Market Notice No. 58293

There is no longer any lightning activity in the vicinity of the Ross - Chalumbin 857 and 858 275kV Lines.

AEMO has cancelled the reclassification of the simultaneous trip of those circuits as a credible contingency event at 1720 hrs 29/03/17.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

As per NER 3.7.2 (b), AEMO believes that there has been a material change in the market to issue an additional MTPASA run.

The MTPASA result published on 29 March 2017 shows Low Reserve Conditions (LRC) in South Australia for Summer 2017-18, March 2018, Summer 2018-19, March 2019, and in Victoria for Summer 2017-18, March 2018, Summer 2018-19, and March 2019. AEMO will continue to monitor the situation and take appropriate actions, if necessary.

Although the Portland Aluminium smelter is currently operating at a reduced load, Alcoa Portland Aluminium has not provided AEMO with their load forecasts for the medium term time frame. Hence, AEMO has not updated the MT PASA demand forecast in relation to this.

To view the summary of MTPASA results for the next 24 months, visit AEMO's website on http://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data-dashboard and click on the 'Medium Term Outlook' tab.

This notice supersedes Market Notice 58263 published on 28 March 2017.

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 capacity reserve conditions over a two year period.
AEMO may apply probabilistic studies such as Energy Adequacy Assessment Projection (EAAP) to confirm the LRC findings of MTPASA before intervening in the market.

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

Supply Planning
AEMO

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event: Collinsville North - Newlands 7121 and Collinsville North - Stoney Ck 7306 132 kV Lines in Qld Region due to Lightning.

Lightning is occurring near the Collinsville North - Newlands 7121 and Collinsville North - Stoney Ck 7306 132 kV Lines.

AEMO considers the simultaneous trip of those circuits to now be more likely.

AEMO has reclassified the simultaneous trip of those circuits to be a credible contingency event from 1450 hrs 29/03/2017 hrs until further notice.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event: Ross - Chalumbin 857 and 858 275 kV Lines in Queensland due to Lightning.

Lightning is occurring near the Ross - Chalumbin 857 and 858 275 kV Lines.

AEMO considers the simultaneous trip of those circuits to now be more likely.

Therefore AEMO has reclassified this as a credible contingency event from 1430 hrs 29/03/17 until further notice.


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation of the Reclassification of a Non-Credible Contingency Event: Bouldercombe - Rockhampton 7108 and Bouldercombe - Egans Hill 7221 132 kV Lines in Queensland due to Lightning.

Refer to AEMO Electricity Market Notice 58290

There is no longer any Lightning activity in the vicinity of the Bouldercombe - Rockhampton 7108 and Bouldercombe - Egans Hill 7221 132 kV Lines.

AEMO has cancelled the reclassification of the simultaneous trip of those circuits as a credible contingency event at 1430 hrs 29/03/17

Manager NEM Real Time Operations