Hi Paul
Thanks for the response.
Firstly, a fixed AC Power limit would be helpful to, in-part, model impositions made upon specific projects by the connection authority - The "transfer capacity", a MW limit that cannot be exceeded.
Unfortunately, to go deeper is probably not in your remit for us here in Australia :-). In Australia, each intermittent generator is treated on a case-to-case basis under the framework in Chapter 5 of the National Electricity Rules (
www.aemc.gov.au/sites/default/files/2019-07/5.%20Network%20Connection%20Access%2C%20Planning%20and%20Expansion.pdf
). This entails additional output restrictions based upon at least active power, voltage and frequency droop controls as well as complying with AEMO’s dispatch constraint equations for system normal, contingency events and system strength. This all probably means some post processing of the results.
Regards
Mark