Elevated prices in SA on 4th June 2024
A brief run of high energy prices in SA on 4th June 2024 was observed in the evening. Energy prices as projected in the predispatch runs from earlier in the day had threatened to reach above $15000 but as time…
Semi-Scheduled Generation
Case Study of 14:15 on Thursday 22nd February 2024 (large collective under-performance across all Semi-Scheduled units)
In part 2 of a Case Study about Thursday 22nd February 2024 – specifically looking at Aggregate Dispatch Error across all Semi-Scheduled units (and in this part 2 looking just at 14:15).
Aggregate Dispatch Error across all Semi-Scheduled units (NEM-wide) throughout Thursday 22nd February 2024
Finding some time to make some progress in compiling GenInsights Quarterly Updates for 2024 Q1, here’s a short Case Study of Thursday 22nd February 2024 (a day that saw significant collective under-performance of Semi-Scheduled units with respect to their Targets).
Regulation FCAS Costs in 2023
Following a presentation with the CEC, Linton shared some insights into FCAS Regulation costs for wind and solar units over last calendar year.
Keeping Up with the Curtailment Part 2: The what and the where
Dan Lee takes a deeper dive into network and economic curtailment, and shares some charts and data maps that demonstrate seasonal effects, and the geographic spread of units affected.
How many Semi-Scheduled units have taken advantage of the market change that went live on 7th Aug 2023?
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.
A long-range trend of large instances of Aggregate Raw Off-Target (AggROT) across all Semi-Scheduled units
The second article today (falling out of analysis for GenInsights Quarterly Update for 2023 Q4) presenting a long-term trend of the incidence of large instances of Aggregate Raw Off-Target across the growing number of Semi-Scheduled units operating in the NEM.
Tuesday 31st October 2023 sees the only two instances (in Q4, and all year) of AggROT for Semi-Scheduled units < -500MW
Also from GenInsights Quarterly Updates for 2023 Q4, the particular case of Tuesday 31st October 2023 is also worth sharing (and a broad audience understanding).
Large instances of collective under-performance across all Semi-Scheduled units on Sunday 24th December 2023
Returning a focus to GenInsights Quarterly Updates for 2023 Q4, here’s a particular example from Sunday 24th December 2023 worth sharing (and a broad audience understanding).
Aggregate Dispatch Error across all Semi-Scheduled units (NEM-wide) throughout Tuesday 13th February 2024
Looking back at Tuesday 13th February 2024 there’s consistently large aggregate under-performance (compared to Target) across all Semi-Scheduled units in the NEM through daylight hours. The reason for the increased procurement of Regulation Raise.
The early wind farms reaching 20 years: how are they performing?
With Challicum Hills Wind Farm recently celebrating its 20th anniversary, Dan Lee takes a look into the long-term trend of technical and commercial performance of the oldest wind farms in the NEM.
Case Study – Severe Weather Challenges Day-Ahead Forecasts for 7, 8, 9 September 2023
A bout of severe weather for many parts of south-eastern Australia brought challenging weather conditions which appear to have impacted variable renewable energy forecasts for the NEM. The case study delves into forecast differences on the 7th, 8th and 9th of September 2023.
Case Study (part 1) of large collective under-performance for Semi-Scheduled assets on Friday 18th August 2023
A brief article as a first Case Study looking at Friday 18th August 2023, in conjunction with the compilation of GenInsights Quarterly Updates for 2023 Q3.
Semi-Scheduled Bid MaxAvail – Initial Results
A week’s worth of data provides indications of how semi-scheduled generators are using bid MaxAvail to manage dispatch availability.
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 timeframe.
Implemented: Enablement of bid energy MaxAvail for semi-scheduled generators
The change to use MaxAvail from the energy bid, for semi-scheduled units, was implemented on 7 August 2023.
An imminent improvement to the bidding and dispatch process for Semi-Scheduled units
AEMO is re-enabling the ‘MaxAvail’ figure in bids for Semi-Scheduled units. It will act as a limit on capacity available, feeding into the NEMDE dispatch process for the unit. We look at how Semi-Scheduled plant have currently been treating MaxAvail in the bid and share some insights.
AEMO’s MMS 5.2, ez2view v9.7, Semi-Scheduled MaxAvail in the Bid, and a self-forecasting example
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.
Renewable curtailment – forced and not quite so forced
Inspired by the recent article by Tristan Edis (who referenced the GSD2022 in analysis of curtailment of some wind and solar farms), Allan O’Neil follows on with more analysis of the two main types of curtailment. Allan differentiates these as ‘forced curtailment’ and ‘economic offloading’
Beryl Solar Farm (BERYLSF1) shut down with grass fires
Alerted by RenewEconomy on social media that Beryl Solar Farm was offline due to bushfires, I used ez2view to take a quick look.