.ModPowerSystems.EmtThreePhase.Examples.BasicGrids.Slack_RxLine_ZLoad_VCVS_PLL

Information

* this is intended to validate the VCVS_DQ model, pll and dq transform. 
* expected results:

** VCVS_DQ.v [:] = rxline1.v2 [:] 
** VCVS_DQ.i [:] close to 0.

* input to the controlled voltage source (VCVS_DQ) is V_dq from the PLL.