Describe the current behavior

No support for Area Interchange Control

Describe the expected behavior

Ability to include Area Interchange Control (AIC) in OLF simulations.
The classical methods of doing AIC in a load flow are:

• Though an OuterLoop
• Directly in the Newton-Raphson

We propose as a first step to implement the OuterLoop approach only.
The feature can be enabled/disabled through OpenLoadFlowParameters.

Describe the motivation

Area Interchange Control is a classic feature of load flows - just like simulating ratio/phase tap changers. A quick google search reveals e.g. AIC is supported by:

• DIgSILENT PowerFactory
• PSS/E
• Neplan
• powerworld

Entso-e documents consider also AIC as a load flow option:

• EMF requirements section 4.8
• ENTSO-E SKOS codelist in EDI Library also here: cim:PowerFlowSettings.interchangeControlEnabled": "true"

In the PowSyBl ecosystem this can be achieved today using powsybl-entsoe/balance-adjustment module, which is a quite complicated and slow implementation. Integrating the feature directly in OLF as an OuterLoop allows for faster performance, and enables also simulating AIC in security analysis - while powsybl-entsoe/balance-adjustment approach is not suitable when simulating thousands of contingencies.

Extra Information

Requires powsybl/powsybl-core#2883 to be implemented first in powsybl-core/iIDM