some questions about power flow adjustment

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Hello everyone

I want to carry out some experiments of power flow adjustment in PSS/E. 1）When I set the system power imbalance, the power flow solver can always make the system converge. However, in some cases, the power of the balancing machine will exceed the limit. I know that if the power of the balancing machine does not exceed the limit, the power flow of the system will not converge. However, I need this sick power flow scenario, because I hope to change this situation by switching capacitors /reactors. How can I avoid the balancing machine power out of limit by setting PSS/E. 2）Since I have not used capacitors/reactors in PSS/E before, I do not know the meaning of some of these parameters. For example, I don't know how to choose the control model and adjustment method. I don't know the meaning of binit, BLK Steps and BLK Bstep (Mvar).

I really need your help. Any idea or suggestion is OK. I would be very grateful, and I look forward to sharing these issues with you.