Unsymmetric simulation in EMT 3ph

[cwirtz-fgh]

Motivation
To test basic unsymmetric simulations an unsymmetric input signal is needed.

Implemented Solution
As a preliminary solution I implemented a new EMT_Ph3_NetworkInjection1ph and EMT_Ph3_VoltageSource1ph which basically connects to just one phase in the 3ph EMT domain and provides unsymmetric behaviour.

Alternatives?
Are such additional components necessary or is there an easier way e.g. combining EMT 3ph and EMT 1ph components?

Extensions
If the solution is suitable the concept can be extended by enabling a connection to a combination of phases as well as different signals for each phase. Possible implementations would be a new class (like in the basic implementation) or a extension of the basic EMT_Ph3_NetworkInjection and EMT_Ph3_VoltageSource classes.

[m-mirz]

@cwirtz-fgh sorry for the delay. @dinkelbachjan maybe this is a good topic for the next Wednesdays meeting?