We have made lots of efforts to develop an ElectroMagnetic Transient Simulation module to simulate the large 3-phase distribution system. So far it has tried on ~380,000 node distribution system with 10 PV plants total 253 MW equipped with constant power factor controls, and it took ~14 minutes to solve. We know it is an ongoing process, many areas need to improve, as well as many devices and controls will be modeled as we partner with power utility companies and customers... The ElectroMagnetic Transient Simulation Module has the following features:

1. Set Up an ElectroMagnetic Transient Simulation Case:The user can start an ElectroMagnetic Transient Simulation by specifying simulating time step and total simulation time under “EMT Setting” Tab (more settings will be addeded later), and then load dynamical devices models, control models and parameters.
The below is the IEEE-8500-Node-Test-Feeder modified for ElectroMagnetic Transient Simulation with 2 PhotoVoltaic plants, respectively 1.5MW and 2.0MW. Each of PV Plant has 1.0 constant power factor control, which is called "H01PFConstant" in Table below. All 1177 loads are modeled as RLC devices. As mentioned above, more devices and controls are coming...

2. Set Up an ElectroMagnetic Transient Simulation Case: The users can create an ElectroMagnetic Transient Simulation case by choosing the type of fault device either node, line, breaker, switch, or fuse etc., and then select device Id, the fault location, the type of fault, and the fault impedance. And the user also needs to select devices and their variables to plot. And finally press red button to run simulation. The below is the IEEE-8500-Node-Test-Feeder modified for ElectroMagnetic Transient Simulation.

3. Examine ElectroMagnetic Transient Simulation Plots: After the run button is pressed, it will take a couple minutes to run simulation depending on the simulating time step, total simulation time and how big the power system is. After the simulation is done, the plots will pop up, the user can look at each group of plots, zoom in or out to see the device/controls variables and behaviors. The below are 3-phase voltages on PV plant 1’s 480V bus for a 3-phase fault several bus away on a 13kV node, and its active power (Pe) and reactive power (Qe). So the user can see its 1.0 constant power factor controller's performance prior to, during and post fault.