why are dynamic loads (non-linear) cannot be connected directly to a Inductive (RL) circuit in simulations? How will connecting a small resistor across the load solve this issue?

In the help section of 3 phase dynamic load model in Simulink it is mentioned that:

"As the dynamic load is a nonlinear model simulated by current sources, it cannot be connected to an inductive network (R-L in series). Therefore, a small resistive load (1 MW) has been added in parallel with the dynamic load"

What is the reasoning behind this?

Answer 1

[Prashant Arora]

This is a limitation of Simscape Power Systems described at the following documentation links:

http://www.mathworks.com/help/physmod/sps/powersys/ug/how-simpowersystems-software-works.html#btb6i8x-1

http://www.mathworks.com/help/physmod/sps/powersys/ug/building-and-simulating-a-simple-circuit.html;jsessionid=5924555afc47629b2106cd58b8f5#f10-56215