An unexpected network outage in the south-east of South Australia restricts supplies from Victoria at a time of low wind supply in South Australia and results in the dispatch price spiking to $14,200/MWh from 11:30 and oscillating for the afternoon
Some volatility with the hot weather on Wednesday 29th November – is this a precursor for summer?
Tight import limits on the Heywood interconnector and a lull in wind output saw price volatility return to South Australia earlier this week
A volatile couple of days in Queensland, with demand response evident
Extremely hot weather in NSW and the NEM’s underappreciated “rail gauge mismatch” contributed to a sharp multi-state price spike during the afternoon peak
Quick review of an isolated early morning spike in Queensland
A look at last Friday’s short sharp price spike in Queensland and why it led to negative settlement residues on the interconnection with NSW
The volatility of the NEM was showcased again on Monday as South Australia experienced two major price spikes in the space of an hour. Using NEM-Watch’s play back feature (screenshot below) we were able to relive when the two price spikes hit.
A quick look at a price spike that occurred Monday evening (4th August) in South Australia
The forecast heatwave arrives in Victoria and drives demand towards what looks like being the highest (so far) this summer, and causing prices to pop.
High temperatures passing through NSW provided the opportunity for the Colongra gas-fired power station to shake off the cobwebs and have a run for the day.
A snapshot from NEM-Watch capturing the first volatility seen this summer
An animation of 90 minutes this morning where the price gyrated wildly in response to a trip at Yallourn, and numerous subsequent reactions by market participants and the AEMO.
A cold evening in the NEM, and yet demand can’t make it past 30,000MW – which would have been quite startling 4 or 5 years ago (but not now, as demand has been declining for a number of reasons).
Spot Prices in South Australia were elevated over the past 7 days – here are some reasons why.
Augurs to be an interesting day in South Australia today, with two (now three) price spikes already this morning – due in part to no supplies from coal, or from wind.
A price spike late at night in South Australia, not long after posting other comments about low surplus generation capacity.
Following some tweets from the esaa mentioning how the demand in Victoria on Tuesday 12th March was the highest seen for four years, we had a look back through our records on the day.
At 23:05 on Saturday 9th March AEMO advised that the Millmerran power station units 1 and 2 tripped simultaneously at 22:07 (58 minutes prior) – for reasons still unknown.
Here’s how we saw it unfold at real time.
Some quick notes, and images, of a price spike in TAS this morning.