Curtailment of distributed PV is occurring in South Australia on Tuesday 15th November 2022

A quick note to report that what happened on Sunday 13th November is occurring again today … Tuesday 15th November 2022.

At 09:30 the AEMO published Market Notice 103187 noting that:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From :              AEMO
To   :              NEMITWEB1
Creation Date :     15/11/2022     09:30:03

——————————————————————-

Notice ID               :         103187
Notice Type ID          :         GENERAL NOTICE
Notice Type Description :         Subjects not covered in specific notices
Issue Date              :         15/11/2022
External Reference      :         Distributed PV Contingency 3 (DPVC3) in the SA Region on 15/11/2022.

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

Distributed PV curtailment is occurring in the SA region to maintain system security due to a Distributed PV Contingency condition.

The instruction to maintain demand above the required threshold is expected to end at 1630 hrs 15/11/2022.

Manager NEM Real Time Operations

——————————————————————-
END OF REPORT
——————————————————————-’

More in a subsequent article about the AEMO’s ‘Distributed PV Contingency’ processes.

The Market Notice above followed the earlier DPVC2 level notice at 08:18, as follows:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From :              AEMO
To   :              NEMITWEB1
Creation Date :     15/11/2022     08:18:08

——————————————————————-

Notice ID               :         103186
Notice Type ID          :         GENERAL NOTICE
Notice Type Description :         Subjects not covered in specific notices
Issue Date              :         15/11/2022
External Reference      :         Distributed PV Contingency 2 (DPVC2) in the SA Region on 15/11/2022.

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

AEMO has taken action(s) to maintain power system security in South Australia at 0810 hrs 15/11/2022 due to a forecast Distributed PV Contingency (DPVC) condition.

AEMO actions may include the recall of planned outages, a direction and/or instruction to scheduled and non-scheduled generation, and/or an instruction to maintain DPV generation below a secure DPV generation threshold.

Manager NEM Real Time Operations

——————————————————————-
END OF REPORT
——————————————————————-’

… which in turn followed the DPV1 level notice at 05:52 this morning:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From :              AEMO
To   :              NEMITWEB1
Creation Date :     15/11/2022     05:52:35

——————————————————————-

Notice ID               :         103182
Notice Type ID          :         MARKET INTERVENTION
Notice Type Description :         Reserve Contract / Direction / Instruction
Issue Date              :         15/11/2022
External Reference      :         Update – DPV Contingency 1 (DPVC1) in the SA Region on 15/11/2022

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE
Update to Market notice 103176

AEMO has detected there is an elevated risk of the contingent disconnection of Distributed PV (DPV) with the loss of scheduled generation exceeding secure thresholds in the South Australia region from 1000 hrs to 1700 hrs 15/11/2022. The maximum forecast DPV contingency is 126 MW at 1230 hrs and the secure DPV contingency trigger is 36 MW.

AEMO is seeking a market response.

An insufficient market response may require AEMO to take action or intervene to maintain power system security in South Australia. This may result in action such as the direction of scheduled generation, curtailment of non-scheduled wind generation, and/or an instruction to maintain DPV generation below a secure DPV generation threshold.

AEMO estimates the latest time at which it may need to intervene through an AEMO intervention event is 0830 hrs on 15/11/2022.

Manager NEM Real Time Operations

——————————————————————-
END OF REPORT
——————————————————————-’

As the AEMO noted, this was an update on MN103176 from Monday evening:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From :              AEMO
To   :              NEMITWEB1
Creation Date :     14/11/2022     17:08:16

——————————————————————-

Notice ID               :         103176
Notice Type ID          :         MARKET INTERVENTION
Notice Type Description :         Reserve Contract / Direction / Instruction
Issue Date              :         14/11/2022
External Reference      :         DPV Contingency 1 (DPVC1) in the SA Region on 15/11/2022

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

AEMO has detected there is an elevated risk of the contingent disconnection of Distributed PV (DPV) with the loss of scheduled generation exceeding secure thresholds in the South Australia region from 1030 hrs to 1700 hrs 15/11/2022. The maximum forecast DPV contingency is 108 MW at 1300 hrs and the secure DPV contingency trigger is 36 MW.

AEMO is seeking a market response.

An insufficient market response may require AEMO to take action or intervene to maintain power system security in South Australia. This may result in action such as the direction of scheduled generation, curtailment of non-scheduled wind generation, and/or an instruction to maintain DPV generation below a secure DPV generation threshold.

AEMO estimates the latest time at which it may need to intervene through an AEMO intervention event is 0900 hrs on 15/11/2022.

Manager NEM Real Time Operations

——————————————————————-
END OF REPORT
——————————————————————-‘

More later…