(A first step into the complexities of) the Dispatch Interval in the Real World
A third step in the 'Energy Literacy' journey in helping readers to understand the complexities within each and every Dispatch Interval.
NEMDE
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...
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...
The effect of the ‘S_PPT+SNPT+BLVR_220’ Constraint Equation on Monday 23rd September 2024 (Part 4 of a Case Study)
In Part 4 of this Case Study (with respect to spot price volatility in South Australia on Monday 23rd September 2024) we take a detailed look at the 'S_PPT+SNPT+BLVR_220' Constraint Equation, which was particularly...
Gremlins in the dispatch process? (Thursday 5th September 2024)
Apparently some IT issues within the AEMO are causing issues with the AEMO dispatch process - on Thursday 5th September 2024.
Missing megawatts and phantom generation
Seven days ago, AEMO notified the market of a Scheduling Error from 24th Jan 2024 to 7th March 2024. A client asked us what it meant - so guest author Allan O'Neil has helped...
Victorian renewable generation on 13 February 2024: One picture and a thousand (sorry, many more) words
Guest author, Allan O'Neil, takes us several steps further in understanding the events in Victoria on Tuesday 13th February 2024 - especially with respect to VRE (wind and solar) production.
Weird and wacky (erroneous?) transmission transfer limits for VIC1-NSW1 and Basslink on Tuesday 13th February 2024
A short article to record a question from a client that we did not have time to investigate further today.
What inputs and processes determine a semi-scheduled unit’s availability
It is indispensable to understand how the semi-scheduled unit availability gets produced to optimally manage the critical inputs and comprehend dispatch outcomes. This article explains the key inputs and processes, focusing on the dispatch...
Enablement of ‘MaxAvail’ in the Bid for Semi-Scheduled units to go live (Mon 7th or Tue 8th Aug 2023) … and other enhancements in future
2 x AEMO Market Notices this afternoon prompt this article about four upcoming Market Enhancements ... with the first to planned to commence from next Monday 7th August 2023
AEMO declares Scheduling Error (incident #54) with respect to post-Liddell snag
AEMO has confirmed our earlier hunch of a Scheduling Error in the immediate aftermath of the Liddell unit retirements.
How dispatch works … it’s much more than just a bid stack
New guest author, Ryan Esplin progressively builds a more precise model of the NEMDE dispatch process to illustrate why the stylised 'Merit Order' bid stack model is increasingly not enough to explain dispatch and...
Liddell’s ghost stalks the market
During early morning Monday 1st May prices spiked in the NSW quite unexpectedly. Guest author Allan O'Neil takes us into the complexities of the EMMS and NEMDE to help us understand the mechanics of...
Dispatch of the market’s more complex at present … with SA on its own island (and TAS still in pieces)
One of the side-effects of the transmission issues in South Australia and Tasmania is a (much) more complex dispatch process - with NEMDE file creation times slowing down as a result.
Market volatility on Wednesday 10th August 2022 (incl FCAS prices going haywire) – Failure of Market Systems?
A short initial article to flag market volatility on Wednesday 10th August 2022 which sees ENERGY prices elevated (particularly TAS) and also Contingency FCAS prices at MPC
Two alternate theories of why capacity was withdrawn
Second (linked) article this evening, spelling out the two theories we're aware of with respect to why some participants might have withdrawn capacity from the NEMDE dispatch/pricing run in June 2022 - leading to...
Interconnector constraints and limits–an explainer, and a few traps
Limits on interconnectors play a key role in setting regional prices in the NEM. Marcelle finds a number of traps when interpreting the market data.
Who gets to run when everyone bids the same? A crash course in disorderly bidding and tie-breaking
Marcelle explores the little-understood concept in NEM dispatch of the tie-break principle, using the new 'Constraint Dashboard' widget in ez2view.
Updated (and extended) latency statistics for P5MIN file creation at the AEMO
Following the article on Tuesday 15th February about 'blow-out in file creation latency', in this article we update stats for the past week ... but also look as far back as late 2018 to...
NEMDE under strain? Escalation in File Creation times for P5MIN
Over the past 2 weekends in February (in particular) we have noticed AEMO's file creation time for 'P5MIN' files has increased significantly (and this has caused challenges for Participants). We take an updated look.