This tag collates a collection of articles pertaining to the ‘N-AVMN_16’ constraint set
… which is invoked when there is an outage on the Avon to Marulan (16) 330kV line in southern NSW.
It’s one of a number of line outages relating to 330kV lines from southern NSW into Sydney that can provide an increased chance of volatility.
(As at February 2026*) there are three different constraint equations that are members of the ‘N-AVMN_16’ constraint set. These are:
(a) the ‘N>>16_70_71’ constraint equation
(b) the ‘N>>16_8_18’ constraint equation
(c) the ‘N>>16_8_39’ constraint equation
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Regarding the (*) note that constraint set (and equation) formulation can (and does) change over time, so you’d need to use ez2view Time-Travelled to a particular dispatch interval to understand the formulation of the constraint set at that time.
As noted in this NEMwatch snapshot at 13:35 (NEM time) on Friday 6th February 2026, a very similar pattern (perhaps including similar behaviours) is emerging today, with similar afternoon volatility in NSW.
At 15:15 (NEM time) on Thursday 5th February 2026, Dan posted about ‘Early afternoon price spikes in NSW on Thursday 5th February 2026’. The volatility did continue ...
On Tuesday we posted ‘A brief overview of the situation in NSW on Saturday 10th January 2026 (prior to further analysis)’. In this article, we delve more into (large-scale) battery operation in NSW through the period of volatility.
Noting that the ‘N-AVMN_16’ constraint set is (including some intermissions over the duration) slated to be invoked out until the middle of March 2026.
A very quick article to record the price spike (for ENERGY) in the NSW region at 14:55 earlier today (Friday 17th October 2025) ... and Contingency Lower in QLD.
There was a short-lived (but interesting) price spike for ENERGY in the NSW region on Friday evening 10th October 2025. Here's a first look.