K.2 VOLTAGE CONTROLLED CURRENT SOURCE

We begin with voltage-controlled current sources.  The dialog box is shown below.

You can tell this device is injecting real power at nominal voltage because at voltage of 1.0 pu, a current of 5774A at power-factor angle is 0 is injected into the network.  It continues to inject substantial amount of real power until the voltage drops below 0.5 pu. 

An important observation to make is that the current magnitude (6,350A) and the power-factor angle (-85 degrees) stop changing when the voltages drops to 0.3 per-unit.

You can remove the real-power injection from this VCCS at voltage of 1.0 pu by keeping only two rows of parameters as shown below:  An angle of minus 90 degrees means that the current is purely reactive, and therefore has no real-power component whatsoever.  At the nominal voltage, the current magnitude is zero.

For voltage between 1.0 pu and 0.3pu, OneLiner automatically calculates the current and the PF angle by interpolating linearly between the values between the first two rows.

For voltage below 0.3pu, OneLiner automatically uses the same current and PF angle on the last (second) row.

It is important that the power-factor angle is set to -90 degrees for all the rows, including the first row where the current magnitude is zero.