An astute reader noted to me about the Central-to-Southern constraint binding today in Queensland, one of the rare days where I did not have an ez2view dashboard display alerting me to its occurrence.
However I do have a brief period now to wind back the clock through “Time Travel” in the software to snapshot the 12:25 dispatch interval as an example of what happened:
The particular constraint bound (Q_CS_1750) is of the form Left Hand Side (LHS) ≤ Right Hand Side (RHS), with the Left Hand Side containing all the terms that NEMDE (the dispatch engine) tries to optimize – which in this case means reduce or “constrain down” the output:
One of three founders of Global-Roam back in 2000, Paul has been CEO of the company since that time.
As an author on WattClarity, Paul's focus has been to help make the electricity market more understandable.
Some initial analysis looking into the question of whether the increased penetration of solar PV is increasing the variability of scheduled demand to the point that generators can exert more pressure on spot prices.
An animated walk through 19 hours of Saturday 14th January 2017 in the Queensland region of the National Electricity Market – a day we dubbed “sizzling Saturday” not least because of extreme price volatility
For only the 5th time in 11 years of NEM history (and the 3rd time for South Australia) four consecutive days of price spikes have forced the Cumulative Price to the Threshold, and AEMO has imposed price caps to prevent retailers from going bust.
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