Simulation cannot continue after the loss of SM at node 1. And the system is always oscillating with all-GFCs (no SM).

[HubertStone]

Hi Mr Tayyebi. It's wonderful work and it is really helpful. But I may encounter two issues when reproducing the case study results of the loss of SM and No-Inertia Systems with all GFCs (Section IV. F in the paper).

1. The simulations always get stuck at the moment of SM loss, whether it is droop control, VSM, or matching control. Say that when I set T_loss=25, the Simulink always get stuck at T=25.005 or 25.007, and won't move on.
   
   

2. To reproduce the results of No-Inertia Systems, I replaced the SM at node 1 with a duplicate of GFC model at node 2 or 3. But the time-domain results (P and f) are always oscillating with constant amplitude even without disturbance.
   
   

I am wondering whether there is something wrong with my settings or not and how to fix it? Thank you!

[anil25293]

%% Converter params
V1_rms=1000; %Low voltage side
I_b_LV=S_b/(sqrt(3)V1_rms);
V_m=sqrt(2/3)V1_rms;
Vdc_n=3V_m;
n=200;
C_dc=0.008(n);
R_f=0.001/n;
L_f=(1/n)20010^-6;
C_f=n30010^-6;
R_dc=(Vdc_n/(0.05*(S_b)/Vdc_n));
w_f=2pi5;
What is "n" here??