Hi yangyanhui,
I played a bit with your model. First thing i noticed is you have different setting for solver between test_SIL_TOP and test_test_SIL models.
Unfortunately, i can't run your original model on my side since i do not have license for the Simscape Power System to use the 3 phase side generator - but i changed a bit the harness model to use standard Simulink blocks and it works fine.
Please find attached the models. Can you please try it on your side and confirm these ones works?
Best regards,
Daniel

