Distraction #1) We’re sweltering in Brisbane and steaming towards what would be a shattering new all-time demand record for the QLD region (latest P30 predispatch shows the prediction for 10,656MW ‘Market Demand’ peak at 17:30 today
…. if this holds true, it will be well past the previous all-time record (10,119MW) from 8th March 2022.
Distraction #2) We recently reconfigured our office and the market activity today has prompted us to complete the process of getting all of our display screens up (some for looking at the NEM externally – using our software and other things – and some for monitoring the internal processes we use to serve our clients).
Anyway, we loaded a dashboard of our live and high-speed readings of System Frequency in our office, and something jumped out at me that I thought was worth sharing.
For those not so familiar with why System Frequency is important, there’s an explanation on this Glossary Page that explains frequency and FCAS.
Apologies that I’ve done a messy job in quickly annotating with approximate times and so on.
Q1) Is it just me, or do other readers see expanding peak-to-trough cycles in frequency as daylight hours ramp up?
Q2) If this is the case (and if it is systemic) …
(a) what share of this might be caused by (the variability in) solar injections
(b) … or is it related to some other form of supply or demand that is daylight related?
Q3) Is it also me, or do other readers see that the frequency is biased low (i.e. under 50Hz) more often than not during much of the daylight hours showing
(a) having asked that question, I recall that I’d looked before about the skew of frequency in the article ‘Observations of differences in system frequency in the Mainland NEM (comparing 2019 to 2021)’ of 14th May 2021.
(b) In that article I’d also seen the pattern whereby frequency from ~08:00 to ~12:00 was typically skewed low.
Q4) If that’s the case, what are the implications of it?
Comments welcome on the patterns (potentially) noted above?
So having shared that, I’ll get back to the GenInsights Quarterly Update report for Q4 2022 … noting that it will cover system frequency patterns in Appendix 1.
PS conversation starting on LinkedIn
For what it’s worth, there’s a conversation starting on LinkedIn here about this article and the questions within it.