This paper was published by the Wind Energy Science journal. The journal is open-access and is a run by the EAWE – the European Academy of Wind Energy. The publication charge is reasonable at around EUR 70 per page and there is no page limit. Even nicer is that the processing charge is lower if you use Latex. That puts a smile on my face 🙂
Thankfully, you can read the full paper here: https://wes.copernicus.org/articles/5/225/2020/
https://doi.org/10.5194/wes-5-225-2020
TL;DR Version: This work uses a single, IEC Type 4 wind turbine to provide AGC. The turbine is an 800 kW Enercon E-53 machine located at the Cowessess First Nation site east of Regina, Saskatchewan. 10% of rated power is offered on the regulation market and up-regulation (power increase) is provided via continuous curtailment. Anemometer wind speed is averaged over 30 seconds and used to estimate power in the wind via a persistence model – power is assumed to match the average value. Power targets are updated every four seconds. Performance is good – as you might expect with any inverter-based technology. The question of income is more challenging although PJM regulation market rates would lead to profitable operation.