Fast restart

[annetill]

Describe the current behavior

The supported features are:

• Generator update: change of targetV.
• Shunt compensator update: change of section count.
• Switch update: change open/close.

Describe the expected behavior

We need more features:

• Open/close a branch at both sides.
• Open/close a terminal (to be precised).

Describe the motivation

No response

Extra Information

No response

[bdonon]

A fast restart would be super useful to accelerate the training of machine learning models that require to run a lot of simulations with small variations.
Features mentioned in the above message would directly benefit my ongoing project, hopefully drastically decreasing the training time.
Here are some related features that I would need:

• Secondary Voltage Control extension: change of targetV.
• Ratio Tap Changers: change of targetV.

[geofjamg]

A fast restart would be super useful to accelerate the training of machine learning models that require to run a lot of simulations with small variations. Features mentioned in the above message would directly benefit my ongoing project, hopefully drastically decreasing the training time. Here are some related features that I would need:

* Secondary Voltage Control extension: change of targetV.

* Ratio Tap Changers: change of targetV.

Secondary voltage control targetV pilot point and participate of control units fast restart is done in #966. 2 and 3 windings transformers target V fast restart is done in #967.