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 timeframe.
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 has confirmed our earlier hunch of a Scheduling Error in the immediate aftermath of the Liddell unit retirements.
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 price outcomes in the NEM
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 how this happened.
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.
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
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article this evening, spelling out the two theories we’re aware of with respect to why some participants might have withdrawn capacity from the NEMDE dispatch/pricing run in June 2022 – leading to the AEMO Suspending the Market.
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.
Marcelle explores the little-understood concept in NEM dispatch of the tie-break principle, using the new ‘Constraint Dashboard’ widget in ez2view.
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 see a broader pattern.
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.
A quick look at the ‘Q^^NIL_CS’ constraint equation, which was also active today in QLD and influencing market outcomes.
A short article (in the midst of GenInsights21 completion) more broadly sharing 2 good news stories from AEMO in the context of the NEMDE dispatch process.
In this article we discuss the 1st of 3 Potential Tripwires that wholesale market participants and others will encounter from October 2021 … with Tripwire #1 coming from the implementation of Five Minute Settlement.
In part 5 of this expanding Case Study of the unexpected price spike on Tuesday 13th Oct, linked to a large & sudden drop in output across 10 solar farms, we take a detailed look at the constraint set ‘Q-BCNE_821’ invoked to deal with the transmission outage between H11 Nebo (in ‘North’ zone) and H10 Bouldercombe (in ‘Central-West’ zone)
Highlighting the different approaches taken to cost/price based dispatch in an interconnected electricity system (or market).
Walking through 5 (much simplified) “Dispatch Intervals” to illustrate some starting principles of marginal price based dispatch arrangements, such as used in the National Electricity Market