This test case is composed one infinite bus, three regular
buses, one load, two lines a phase tap changer transformer and the
associated phase shifter controller.
At t = 0s, the phase tap changer transformer is at its centre
tap position of 9 and has a phase angle of 0°. It thus does not
affect the power flow through the circuit and both lines are
equally loaded at 0.5 Pu.
At t = 50s, the phase shifter controller is turned on with a
target PMonitored = 0.7 Pu (+/- tolerance) through line01.
The controller then passes several taps down. The resulting
negative phase angle (-7.5°) has diverted portion of loading onto
the parallel circuit, while the total load supplied is unchanged.
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.Dynawo.Examples.IllustrativeExamples.DynaFlow.PhaseShifterTransformer