On Monday 29th September 2025 the AEMO alerted of possible MSL1 for the coming weekend (Sat 4th October and Sunday 5th October) in Victoria. The post AEMO forecasts MSL1 for the coming Saturday 4th October 2025 and Sunday 5th October 2025 appeared first on WattClarity.| WattClarity
On LinkedIn someone wrote about the QLD price dropping to the Market Price Floor for the 10:05 and 10:10 dispatch interval today (Mon 29th Sept 2025). So I had a quick look The post A quick review of QLD solar (and curtailment) on Monday 29th September 2025 with price at MPF appeared first on WattClarity.| WattClarity
Late on Thursday 25th September 2025, the expected start of the short-notice outage at ER03 was pushed back again (this time by a week). The post Start date of short notice outage at ER03 delayed again, now Friday 3rd October 2025 appeared first on WattClarity.| WattClarity
An article in the print version of the AFR this morning (asking more question about the achievability of the closure of Eraring in 2027) prompts some more head scratching. The post Yet another data point raising questions about whether Eraring will be able to close in 2027, as per current plan appeared first on WattClarity.| WattClarity
It was the RenewEconomy article some weeks ago that initially drew our attention to this White Paper ‘The Role of Grid-Forming Inverters in Providing Inertia (in the NEM)’ from Tesla Energy - but we thought it's worth linking to it directly here now. The post Tesla Energy whitepaper ‘The Role of Grid-Forming Inverters in Providing Inertia (in the NEM)’ will be of interest appeared first on WattClarity.| WattClarity
In part two of this four part series about the success of the CIS so far, we explore why delivery challenges may have emerged. The post Are CIS-ters doin’ it for themselves? Part 2: Understanding why there are delivery challenges appeared first on WattClarity.| WattClarity
Recent debate has centred on the CIS’s success so far. In part one of this four-part series, we look at how projects have progressed since being awarded a contract. The post Are CIS-ters doin’ it for themselves? Part 1: Tracking the progress of CIS projects post-award appeared first on WattClarity.| WattClarity
As a short follow-on article now mid-morning Thursday 25th September 2025 to highlight the delay in the start of the unplanned outage at ER03 as one of the key drivers in AEMO's cancellation of forecast Direction. The post The start of the unplanned outage at ER03 is delayed till early Saturday morning 27th September 2025 appeared first on WattClarity.| WattClarity
We noticed today (Wednesday 24th September) an ~8 week extension added onto the expected return to service date for YWPS2, which tripped offline due to 'LP turbine issues' in August 2025. The post Unplanned outage at YWPS2 extended – return to service slated for 15th December 2025 (and may well extend further) appeared first on WattClarity.| WattClarity
A quick look forward (past the forecast LOR1) to tomorrow evening in NSW, Thursday 25th September 2025. The post Some leading indicators of possible volatility in NSW on Thursday evening 24th September 2025 appeared first on WattClarity.| WattClarity
With the need for an early morning direction flagged for NSW on Thursday 25th September 2025, we take a quick look back 4 weeks ago (to Thursday 28th August 2025) when it happened. The post A quick review of AEMO direction for System Strength in NSW back on Thu 28th August 2025 appeared first on WattClarity.| WattClarity
Worth calling out MN129729 published on Wednesday 24th September 2025 at 14:29 about possible early-morning intervention in NSW for System Strength reasons The post AEMO notes possible early-morning direction in NSW on Thursday 25th September 2025 appeared first on WattClarity.| WattClarity
Following from the quick look at the unplanned outage for MP2 (now underway) there's some difference in the picture for the unplanned outage for ER03. The post ER03 now (again) slated to come offline early Thursday morning 25th September 2025 appeared first on WattClarity.| WattClarity
A short note looking at the commencement of the unplanned outage for MP2 on Wednesday morning 24th September 2025 The post Yes, MP2 did come offline in the early hours of Wednesday morning 24th September 2025 appeared first on WattClarity.| WattClarity
At 15:30 today (Tuesday 23rd September 2025) the AEMO flagged in MN129259 a possible need to intervene in NSW this Thursday 25th September 2025 due to forecast low System Strength. The post AEMO oscillates warnings – possible need to intervene in NSW on Thu 25th Sept 2025 for System Strength reasons appeared first on WattClarity.| WattClarity
Today's MT PASA update features forecast tight supply-demand balance in both the SA and NSW regions at various times - in terms of both annual Unserved Energy, and Low Reserve Conditions. The post MT PASA shows forecast Low Reserve Conditions in both NSW (Aug-Sept 2027) and SA (Dec 2026 to March 2027) appeared first on WattClarity.| WattClarity
Coincident with last week's CEC's QCES in Brisbane, the Federal Government announced 16 winners for 'Tender 3' of the Capacity Investment Scheme. The post Belatedly noting 16 winners announced (on Tuesday 16th September 2025) in Capacity Investment Scheme auctions appeared first on WattClarity.| WattClarity
A short article looking at some elevated prices for Regulation Lower FCAS on Sunday afternoon 21st September 2025 The post Prices for Lower Regulation FCAS elevated across the mainland Sunday afternoon 21st September 2025 appeared first on WattClarity.| WattClarity
We noticed yesterday (Saturday 20th September 2025) a large afternoon dip in frequency down towards (but not outside) the limits of the NOFB - and briefly explore here. The post A brief recap of a large afternoon frequency wobble on the NEM mainland on Saturday 20th September 2025 appeared first on WattClarity.| WattClarity
Prompted by a presentation from CleanCo’s Rimu Nelson at the Queensland Energy Summit, Dan examines how operational and bidding patterns at Wivenhoe and Swanbank E have evolved since CleanCo assumed control in 2019. The post A clean break: Wivenhoe and Swanbank operating profiles pre and post CleanCo takeover appeared first on WattClarity.| WattClarity
As our website has grown, we’ve expanded it to link to some of the additional resources that readers might find of value, such as the following: Glossary As time has progressed, we’ve recognised the need to augment the regular articles...| WattClarity
A chart of the the month-by-month semi-scheduled economic and network curtailment totals, along with the top 3 worst hit units over 2023.| WattClarity
It's Thursday 15th February 2024 and (in amongst the detailed analysis relating to Tue 13th Feb 2024 in Victoria) we're releasing the GSD2023 ... the Generator Statistical Digest for the 2023 calendar year.| WattClarity
Initial results from the first week since bid MaxAvail was enabled as a way for semi-scheduled generators to manage availability.| WattClarity
Delving deeper into dispatch availability self-forecasts and the assessment process to further enhance our understanding of this important aspect of the operation of the modern National Electricity Market| WattClarity
2024| WattClarity
2023| WattClarity
A blog that has been providing regular commentary and in-depth analysis into the complexities of Australia's National Electricity Market (NEM) since 2007.| WattClarity
2022| WattClarity
In this article we explain a different (and sometimes quite powerful) way of reviewing some performance metrics in relation to the passage of another dimension of time.| WattClarity
Following AEMO's MN122697 (published at 06:51 NEM time), we take a look at the 'forecast LOR2' condition for NSW on Monday 6th January 2025.| WattClarity
In what seems (to me) to be an extraordinary measure, AEMO speaks directly to the operators of Wind and Solar assets in the NEM, asking them to update the AEMO on the high-temperature limitations of their plant. How did it come to this?...| WattClarity
A first look back at yesterday (Friday 20th December 2019) in the Victorian region - where we saw extreme temperatures, high demand across VIC and SA and (perhaps because of high temperatures) a large discrepancy open up between forecast Wind Availability and actual. This would have contributed to the surprise LOR2 announcement and commencement of RERT negotiations.| WattClarity
It's quite early Friday morning, 1st October 2021 ... and Five Minute Settlement has commenced. Here's a *very* early initial look.| WattClarity
In her first article for WattClarity, Marcelle looks at questions raised in the recent summer on the forecasting of performance at high temperatures of wind and solar generators, and asks how AEMO and industry can work together to improve this.| WattClarity
The ‘Connection Point Dispatch (CPD) Price’ is a term that we coined through 2019 in the ongoing development of our ez2view software – and have since applied in the Generator Statistical Digest 2019. (A) What is the CPD Price? The...| WattClarity
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.| WattClarity
The change to the NEM dispatch engine that supports the use of the energy bid's MaxAvail, for Semi-Scheduled generators, has been implemented.| WattClarity
Today (Tue 23rd May) is the go-live date for AEMO's EMMS v5.2 - which will contain new data for some market enhancements. Here's a quick look at where this first change will appear in ez2view, highlighting some considerations for Semi-Scheduled units and self-forecasting.| WattClarity
AEMO is re-enabling the ‘MaxAvail’ figure in bids for Semi-Scheduled units. It will act as a limit on capacity available, feeding into dispatch processes. We look at how Semi-Scheduled plant have currently been treating MaxAvail in the bid and share some insights.| WattClarity
Following up to AEMO's recent Intermittent Generator forum, Marcelle looks at the challenges for wind and solar farms in providing consistently good plant availability information to AEMO and the value of transparency of this data.| WattClarity
A collation of articles related to the consideration, approval, implementation and outcomes of the IESS rule change in June 2024 … which leads to: 1) The implementation of BDUs (Bi-Directional Units) and 2) The implementation of Hybrid units.| WattClarity
Following from a steady stream of questions we receive in relation to a range of our products (but in particular with respect to "the RenewEconomy Widget") we've invested some time to put this post together to explain some of what we understand about electricity demand.| WattClarity
Over time, we’ve commonly found ourselves writing articles that help to explain market concepts or assist with different aspects of energy literacy. One of the primary reasons we’ve done this is because we’re aware of the major challenge that declining...| WattClarity
Our GSD2023 was released just over 4 weeks ago. Finally today I have a chance to utilise the GSD2023 Data Extract to take a look across all the Semi-Scheduled units (i.e. Wind and Solar) and see who's been using MaxAvail in their bid to limit their plant availability ... and the DUIDs that have not yet used this new facility.| WattClarity
It is indispensable to understand how the semi-scheduled unit availability gets produced. This article explains the key inputs and processes, focusing on the dispatch timeframe.| WattClarity
Page to be fleshed out, about the Semi-Scheduled category (A) Summary of current arrangements In short-hand, the operation of a DUID that is registered as Semi-Scheduled is part-way between the fully Scheduled category (with a very prescriptive set of requirements...| WattClarity
Reposting a portion of an article we published some years ago, to help readers understand the difference between a MW and a MWh.| WattClarity
A feature of the upcoming EMMS technical specification that distinguishes demand response units from scheduled loads could impact some users of NEM data, if left unmanaged.| WattClarity
Readers at WattClarity might recall that we have asked the question above a couple of times in recent weeks – and a big thanks to those who responded already! We’re blessed with opportunities at present (have been for a while,...| WattClarity
Guest author, Allan O'Neil, takes the release of the GSD2022 as an opportunity to take a look at the past 10 years of performance of the four-unit Liddell Power Station (one unit closed in 2022 and three to close soon in 2023), contrasting against two other black coal-fired stations.| WattClarity
On Thursday 23rd February, hot weather in SA drove 'Market Demand' to its highest level in just over 9 years, and delivered a bit of spot price volatility. We investigate....| WattClarity
A quick post about some evening volatility in VIC and SA| WattClarity
