A quick view into constraints on the Heywood interconnector, on Tuesday 22nd July 2025
A quick view of our congestion map where constraints on the Heywood interconnector may elevate risk of high energy and FCAS prices this week.
Heywood
NEMDE nightmares – parallel pathways and clashing constraints
Prompted by a question by a client in a training session for a new ez2view user, guest author Allan O'Neil has written 2,940 words to explain the price outcome in one particular dispatch interval...
PEC Stage 1 in operation – be careful what you wish for
Guest author Allan O'Neil looks at how operation of Project EnergyConnect Stage 1 may affect market outcomes, with some early indications that impacts won't be as straightforward as you might think.
An inter-regional interconnector refers to *the whole of* the transmission path between RRNs
We already noted this a few times recently, but we thought it would be worth separating out as its own article under the ‘Energy Literacy’ category, as it’s likely we’ll be referring back to...
Testing the Heywood interconnector on Friday 11th October 2024, as part of PEC Stage 1
A short note, recording MN118771 about testing for PEC stage 1.
AEMO to change Constraint Equations used during outages that create a credible risk of SA islanding
A short note about Market Notice 118672, as that will be of interest to many of our readers.
Morning energy price volatility in SA on 18 July 2024
Spot price volatility was observed in SA on the morning of 18 July 2024.
Elevated prices in SA on 4th June 2024
A brief run of high energy prices in SA on 4th June 2024 was observed in the evening. Energy prices as projected in the predispatch runs from earlier in the day had threatened to...
Focusing on VIC exports (and imports) with the ‘Major Power System Event’ on Tuesday 13th February 2024
In this article we look again at Tuesday 13th February 2024 (Victoria's ‘Major Power System Event’) and sum up the impact of the event on net exports from Victoria over a 14-hour period, but...
Run of extreme prices in the SA region on Friday 8th December 2023
Prices in SA have spiked to close to the market cap and remained elevated, following the invocation of the 'I-VS_250' constraint set due to extreme weather conditions.
No, South Australia is *not* exporting more electricity than it imports…
We're seeing an increasing number of claims on social media along the lines of 'South Australia exporting more than it imports'. Whilst that was true around 2019, it's NOT been the case for a...
Price volatility in SA on Sunday afternoon 13th August 2023
Continuing network outage, and weather conditions, leads to long duration of elevated price in SA over the weekend.
Over four hours of volatility in the SA region on Friday evening 11th August 2023
Some quick notes about volatility in SA on Friday evening 11th August 2023.
Price volatility in SA on August 1, 2023
Light winds and a constrained interconnector contributed to elevated prices on 1 August 2023.
A quick (interim) review of the ~7 days living on the SA island + some broader questions to explore later
Yesterday's note from ElectraNet prompted this initial summary of some of what we've seen happen with the SA islanding event over the last 12 days.
SA islanding ends, on Saturday evening 19th November 2022
On Saturday evening 19th November 2022 the Heywood interconnector returned to service following temporary repairs to the tower damaged on Saturday 12th November.
A quick review of the sequence of events in SA immediately around the islanding on Saturday 12th November 2022
Fifth article for Monday 14th November 2022 ... taking a quick initial look at the sequence of events immediately around the islanding in South Australia on Saturday 12th November 2022.
ElectraNet update at midday on Sunday 13th November 2022
Electranet have posted a short update in the middle of the day, Sunday 13th November 2022.
South Australia islanded (and ~80,000 without power), on Saturday 12th November 2022 (and until Friday 18th Nov 2022)
An initial article with the islanding of the South Australian region on Saturday evening, 12th November 2022.
Overnight volatility in South Australia – part 1
A run of volatility in South Australia lasting ~90 minutes triggered a few alerts.