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SA Energy Mix and Regional Curtailment of Semi-Scheduled Generation

The following two graphs show the Regional Curtailment as a Daily Energy - South Australia is the yellow line. The first graph is for the Year to 05 Feb 2020 and the second graph is the Year to 05 Feb 2019.

[To gain an understanding of how Curtailment has trended in the past, you can see at the bottom of this page, the Years to 05 Feb 2018, 05 Feb 2017, 05 Feb 2016 and 05 Feb 2015. The first noticeable daily curtailed SA energy followed the System Black event on 29 Sep 2016.]

Regional Curtailment Daily Energy (MWh): Year to 05 Feb 2020
Regional Curtailment Daily Energy (MWh): Year to 05 Feb 2019

The following graphs show specific days and the Regional Curtailment and the Energy Mix / Price for the same day. Thu 09 Sep 2020 is the day of highest curtailed energy (10,559 MWh). The graphs for Tue 04 Feb 2020, represent the day of high curtailment (4,948 MWh ranking the 17th highest day for the year to 05 Feb 2020) during the period of the SA Regions separation from Vic Region due to an extended line outage.

Regional Curtailment: Thu 19 Sep 2019 (10,559 MWh)
Regional Curtailment: Tue 04 Feb 2020 (4,948 MWh)
SA Energy Mix and Price: Thu 19 Sep 2019
SA Energy Mix and Price: Tue 04 Feb 2020

We can see there is a requirement for more Gas generation during the SA separation. AEMO published a market notice on Wed 05 Feb 2020 clarifying the New synchronous generator combinations for the SA + APD + Mortlake Island for system strength and frequency control.

The following graphs show SA daily curtailment for other periods of the year.

Regional Curtailment: Thu 07 Nov 2019 (10,515 MWh)
Regional Curtailment: Thu 23 Jan 2020 (7,439 MWh)
SA Energy Mix and Price: Thu 07 Nov 2019
SA Energy Mix and Price: Thu 23 Jan 2020

The following table ranks the top 23 days for SA Curtailment Daily Energy. Click on link in the SETTLEMENTDATE column and you will go to Energy Mix / Price graph for the day, which also shows the curtailment.

SA Curtailment Daily Energy - Top 23 Days (Year to 05 Feb 2020)

RANK SETTLEMENTDATE REGIONID CURTAILMENT DAILY ENERGY (MWh)
1 19/09/2019 SA1 10,559.2
2 7/11/2019 SA1 10,515.3
3 8/11/2019 SA1 10,302.1
4 11/11/2019 SA1 9,692.1
5 2/12/2019 SA1 8,110.9
6 20/07/2019 SA1 8,036.8
7 1/12/2019 SA1 7,969.2
8 12/07/2019 SA1 7,875.5
9 6/11/2019 SA1 7,756.7
10 11/07/2019 SA1 7,540.7
11 23/01/2020 SA1 7,439.1
12 10/07/2019 SA1 7,434.6
13 26/10/2019 SA1 7,016.7
14 25/10/2019 SA1 6,964.1
15 22/07/2019 SA1 6,530.4
16 31/08/2019 SA1 6,466.6
17 4/02/2020 SA1 5,659.1
18 5/10/2019 SA1 5,656.4
19 27/09/2019 SA1 5,286.7
20 2/10/2019 SA1 5,251.4
21 29/06/2019 SA1 5,170.4
22 24/08/2019 SA1 4,954.4
23 2/02/2020 SA1 4,948.2

SA Regional Curtailment as a Daily Energy - South Australia (2018 to 2015)
Regional Curtailment Daily Energy (MWh): Year to 05 Feb 2018
Regional Curtailment Daily Energy (MWh): Year to 05 Feb 2017
Regional Curtailment Daily Energy (MWh): Year to 05 Feb 2016
Regional Curtailment Daily Energy (MWh): Year to 05 Feb 2015

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