AEMO ELECTRICITY MARKET NOTICE.

AEMO Intervention Event - Intervention price dispatch intervals - Monday, 29 January 2018

Refer AEMO Electricity Market Notice no. 61021

An AEMO Intervention Event has been implemented by issuing a direction to maintain the power system in a secure operating state.

The AEMO Intervention Event commenced in the 1805 hrs 29/01/2018 dispatch interval and is forecast to apply until 0400 hrs 31/01/2018.

AEMO declares all dispatch intervals during the AEMO Intervention Event to be intervention price dispatch intervals.

The direction is expected to affect dispatch quantities for intervention pricing purposes from the 2135 hrs dispatch interval on 29/01/2018.


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Direction - South Australia Region 29/01/2018

In accordance with section 116 of the National Electricity Law AEMO has issued a direction to a participant in the South Australia region.

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

The direction was issued at 1800 hrs 29/01/2018, with effect from 2130 hrs 29/01/2018. The direction is expected to stay in place until 0400 hrs 31/01/2018.

For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).


Manager NEM Real Time Operations

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 2130 29/01/2018 to 0400 hrs 31/02/2018 in Pre-dispatch published at 1700 hrs 29/01/2018 are sufficient to maintain system strength in SA however following a credible contingency event AEMO will not be able to return SA to a secure operating state within 30 minutes.

Refer: http://www.aemo.com.au/-/media/Files/Electricity/NEM/Security_and_Reliability/Congestion-Information/2017/Transfer-Limit-Advice---South-Australian-System-Strength-v3.pdf

AEMO currently estimates that, in the absence of sufficient market response by 1800 hrs 29/01/2018. AEMO may need to issue a Direction requiring one or more SA synchronous generating unit(s) to operate or remain synchronised from 2130 hrs 29/01/2018 to 0800 hrs 01/02/2018, to maintain power system security and sufficient system strength in SA.

Manager NEM Real Time Operations

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: Ross - Chalumbin No.857 275 kV and Ross - Chalumbin No.858 275 kV

Cancellation time: 29/01/2018 17:05

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 61016

Auto-generated on behalf of Manager NEM Real Time Operations

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: Chalumbin - Turkinje No.7165 132 kV and Chalumbin - Turkinje No.7166 132 kV

Duration: 29/01/2018 16:59 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

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: Ross - Chalumbin No.857 275 kV and Ross - Chalumbin No.858 275 kV

Duration: 29/01/2018 15:27 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

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: Collinsville - Stoney Creek No.7306 132 kV and Collinsville - Newlands No.7121 132 kV

Duration: 29/01/2018 14:53 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

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: Collinsville North - Proserpine No.7125 132 kV and Collinsville North - Proserpine No.7126 132 kV

Duration: 29/01/2018 14:47 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation -VIC region - Monday, 29 January 2018

Unplanned outage occurred at 0843 hrs on the Wodonga No2 330/66/22 kV Transformer.

Constraint sets V-DBUSS_L and V-DBUSS_T invoked from 0850 to 1010 hrs 29/01/2018.

Refer to the Network Outage scheduler (NOS) for further details.

The outage constraint contain the following interconnectors on the LHS

V-S-MNSP1
VIC1-NSW1

NEM Real Time Operations Manager