Implementation of TCSC compensation value action

[Hadrien-Godard]

• Do you want to request a feature or report a bug? Feature.

• What is the current behavior? The action is not implemented.

• What is the expected behavior? The TCSC compensation value action is implemented as an implementation of the Action class (see issue #2015). This action consists in changing the compensation value of a TCSC. A starting idea of possible implementation is:

class TcscCompensationAction extends Action {
    String tcscId;
    double compensationValue;
}

• What is the motivation / use case for changing the behavior? Allow security analysis to take this action type into account.

[sylvlecl]

What is TCSC? :) Maybe we should make the name more explicit (or javadoc may be enough).

[Hadrien-Godard]

Sorry :) It is the acronym for Thyristor Controlled Series Compensator. It is a kind of FACTS (Flexible Alternating Current Transmission System) that modifies line impedance to control power flowing through a line.

[annetill]

Is it more complex that just having a remedial action with the id of the action (of course), the id of the line on which the TCSC is installed and a delta of impedance (maybe only +/-X here or it could be +/-R too?) ? The action will just applied to the line during calculation line.getX() becomes line.getX() + action.getDeltaX() ? It is possible to have that can of device somewhere else ? The generic name of this action could be LineImpedanceAction (or line reactance action).