Autonomous Balancing: Continental Grid Cuts Thermal Curtailment by 48% Using Predictive Load Synthesis
Operators say predictive load synthesis has cut thermal curtailment on a continental grid by 48%, letting wind and solar keep running instead of being switched off. Here is how it works.
- 1Operators report a 48% cut in thermal curtailment using predictive load synthesis.
- 2Curtailment means switching off renewable output because the grid cannot use or move it.
- 3The figure is operator-reported; it is unclear how much the gain came from forecasting versus other changes.
Operators of a continental grid say forecasting software has cut thermal curtailment by 48%, allowing wind and solar to run at full output instead of being switched off. In this illustrative launch-edition scenario, the operators are unnamed and the figure is theirs.
What curtailment is
Wind and solar can sometimes generate more electricity than the grid can use or move at that moment. A windy, sunny afternoon with low demand is a classic example. When supply exceeds what the system can absorb, or when transmission lines are full, operators order some generators to reduce output. That wasted clean energy is called curtailment.
The term "thermal curtailment" is used here as the operators describe it. A common source of such limits is the heat rating of power lines and equipment, which can only carry so much current before they risk overheating. Conservative, fixed limits can leave spare capacity unused.
What predictive load synthesis does
The operators describe software that predicts demand, generation and line conditions a short time ahead, and then continuously adjusts how electricity is dispatched. With a better forecast, a grid can safely run closer to its limits, schedule storage to charge when supply is abundant, and shift flexible demand, such as industrial processes or electric vehicle charging, to the sunniest or windiest hours.
The appeal is economic as much as environmental. Curtailed wind and solar represent investments that produced nothing. Cutting that waste means more value from existing assets without pouring concrete or laying new cable.
The limits of the claim
The 48% figure has not been independently verified, and several questions remain. We do not know the baseline, the period measured, or how much curtailment there was to begin with, since a 48% cut from a small amount means less than the same cut from a large one. It is also unclear how much of the gain came from the forecasting software and how much from other changes, such as new lines or additional storage.
Autonomous control raises its own questions. Operators will want to know how the system behaves in unusual conditions, such as storms or equipment failures, when predictions are least reliable, and what human oversight remains in the loop.
What to watch next
Look for published performance data across more than one season, independent review and word on whether other grids can reproduce the results. If they can, better software may prove one of the cheapest ways to make renewable power go further.
infoLaunch edition: this story is an illustrative scenario. Figures are attributed to the programmes or operators named in the text and are not independently verified. See our Fact-Check Lab and Corrections Policy.
Written by
Elena Rostova
Energy & Ocean Correspondent at ABC 24 Times. About the newsroom • Report an error
