2018| WattClarity
Following the simultaneous trips (on Thu 16th Oct 2025) of YWPS3 and YWPS4, we take a look at current return to service expectations. The post Differing return to service expectations for YWPS3 and YWPS4, following simultaneous trips appeared first on WattClarity.| WattClarity
System frequency remained within the NOFB, appears well managed given the supply loss approached 600 MW. The post System frequency during simultaneous trips at YWPS3 and YWPS4 on Thursday 16th October 2025 appeared first on WattClarity.| WattClarity
Following the simultaneous trip of units at Yallourn, directions to Jeeralang Power Station were issued for maintaining System Strength in Victoria. The post After Yallourn units trip, AEMO again issues directions to Jeeralang Power Station, for System Strength in Victoria appeared first on WattClarity.| WattClarity
A short note on Thursday 16th October 2025 to record both Yallourn Units 3 &4 tripping during the 13:35 dispatch interval (NEM time) today. The post Simultaneous trips at YWPS3 and YWPS4 on Thursday 16th October 2025 appeared first on WattClarity.| WattClarity
Amongst the many emails that hit my inbox recently was an email from the AEMC that spoke to the ‘Package of ISP reform underway’ – and specifically these two arms. The post AEMC communicates two items, relating to a Review of the Integrated System Plan (ISP) appeared first on WattClarity.| WattClarity
A short note to follow the NEMdev 2025 conference (Tue 7th and Wed 8th Oct 2025) and to highlight a comment made by Bruce Mountain about the ISP. The post Bruce Mountain (at NEMdev 2025) spoke to his significant concerns about the ISP appeared first on WattClarity.| WattClarity
A short note to follow the NEMdev 2025 conference (Tue 7th and Wed 8th Oct 2025) and to highlight a comment made by Sarah Lawley about the ISP. The post Sarah Lawley (at NEMdev 2025) spoke about what she sees as ‘circular reasoning’ in the ISP appeared first on WattClarity.| WattClarity
Following my presentation at NEMdev 2025 (on 8th Oct 2025), here are some suggestions that the Nelson Review panel might consider - with respect to forecasting. The post Some suggestions for the Nelson Review panel to consider (with respect to Forecasting) following review of the Draft Report appeared first on WattClarity.| WattClarity
At 09:06 (NEM time) this ‘Notifications’ widget alert from ez2view flags Loy Yang A4 coming offline ... which helps explain the directions for System Strength. The post Short-notice outage at Loy Yang A4 in Victoria on Wednesday 15th October 2025 appeared first on WattClarity.| WattClarity
No Mixed aggregate dispatch groups have been registered. The post Scarce use of aggregate dispatch conformance to-date appeared first on WattClarity.| WattClarity
No sooner had we noted that ‘AEMO changes mind, and directs Murray instead (to run as syncon) for System Strength in Victoria on Wednesday 15th October 2025’ then we receive MN129618 at 09:00 that helps explain. The post AEMO notes ‘Non-credible contingency event’ at Jeeralang appeared first on WattClarity.| WattClarity
Less than an hour after directing Jeeralang (for System Strength in Victoria), AEMO changes its mind and directs Murray instead. Though this was also short-lived! The post AEMO changes mind, and directs Murray instead … but this was also short-lived?! appeared first on WattClarity.| WattClarity
As AEMO had telegraphed yesterday, just after 08:00 (NEM time) on Wednesday 15th October 2025, the AEMO issued Directions to various units at EnergyAustralia’s Jeeralang Power Station for System Strength in Victoria. The post AEMO issues directions to units at Jeeralang Power Station, for System Strength in Victoria (Wednesday 15th October 2025) appeared first on WattClarity.| WattClarity
In the final part of our four-part CIS series, we zoom out to examine what government-backed Contract-for-Difference schemes are really achieving — drawing on policy lessons from the Nelson Review. The post Are CIS-ters doin’ it for themselves? Part 4: Policy lessons highlighted by the Nelson Review appeared first on WattClarity.| WattClarity
Worth noting two market notices today flagging possible intervention because of System Strength issues in Victoria tomorrow (Wednesday 15th October 2025). The post AEMO flags possible intervention tomorrow (Wed 15th Oct 2025) for System Strength in Victoria appeared first on WattClarity.| WattClarity
It appears that there was some large(ish) trip in demand somewhere on the Queensland network, given the spike in frequency at ~07:28 on Tuesday 14th October 2025. The post Small spike in Mainland Frequency, with (apparent) ~400MW trip of demand in Queensland on Tuesday morning 14th October 2025 appeared first on WattClarity.| WattClarity
A short note to record a large-size drop in ‘Market Demand’ in the Queensland region on Tuesday morning 14th October 2025, as captured in this ez2view ‘Notification’ widget alert at 07:31 (NEM time). The post Drop in ‘Market Demand’ in QLD on Tuesday morning 14th October 2025 appeared first on WattClarity.| WattClarity
Given that we’ve written about that outage several times before, worth noting that Eraring Unit 3 came back online Sunday evening 12th October 2025. The post ER03 makes its way back online, Sunday evening 12th October 2025 appeared first on WattClarity.| WattClarity
There was a short-lived (but interesting) price spike for ENERGY in the NSW region on Friday evening 10th October 2025. Here's a first look. The post An initial look at the Spot Price spike in NSW at 17:55 on Friday 10th October 2025 appeared first on WattClarity.| WattClarity
A quick initial look at two lengthy periods of Non-Conformance at Aldoga Solar Farm on Sunday 12th October, with the first period seeing large negative Dispatch Error, and a blip in system frequency. The post Two bouts of >2 hours of Non-Conformance at Aldoga Solar Farm on Sunday 12th October 2025 appeared first on WattClarity.| 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
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2023| 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
