In  this situation better you take permission from three courts and give legal work POA to any one family member of yours. 

1) Your personal presence is not necessary in DV case 

2) your lawyer presence is sufficient 

3) your presence would be necessary for leading evidence 

4) in 498A case your presence would be required 

5) you can with court permission travel abroad 

See you being complainant in 498a case do not need any permission as such to travel abroad though you need to present before court for hearing if summons are issued upon you as prosecution (State) is primary prosecutor and you may not be required on every date, in the case you can inform the Public Prosecutor or engage a lawyer  to assist and file exemption on personal appearance and can take a further date you need to appear on that date.

In divorce case for evidence your personal presence is required though in general your lawyer and Power of attorney can appear similar is in DVC case.

In 498a power of attorney is not valid therefore you need to seek exemption from the court in case when summons are issued. 

The accused will not get benefit of your non -appearance if exemption is filed. Also the court may issue summons or warrant to insure your presence before deciding the case or dismissing it.

Yes you can attend but your advocate should be present. And in stages of evidence your presence is also necessary. Bring complainant you don't need permission. Yes if you don't attend and delay proceedings the dv matter will be dismissed. 

To leave for abroad for study or for work does not require the permission of court.

In other words you can travel at your will.

On your going to overseas for further education does not have any adverse impact on the merit of the case. 

If you have filed all these cases then unless you are present for evidence cross examination during trial the case shall be dismissed. Therefore you should take the cases to their logical conclusion and request the court to issue non bailable warrant against the husband.

1. you are not required to obtain any permission from the Court as you are a complainant in the case,

2. just go abroad and ask one of your close relative/lawyers to handle the situation in your absence,

3. since the case is in beginning, therefore, one year can be elapsed without much difficulty and if required at a later stage an application for adjournment can be given stating the study abroad reason,

4. always be in touch with your lawyer regarding the matter

As for as permission of the court, you being a complainant, is not required to travel during pendency of cases.

DV case and divorce case can be managed by your counsel by seeking your exemption from appearance if  your presence is not required for evidence etc.

498 a is a state case and your presence is required for evidence.

From your narration of facts, since your husband is not available in India and yet to receive summons from courts the cases are not likely to proceed at least for one year..

You can talk to your counsel and I am of the opinion that he can manage everything in your absence.. 

You say that you are the complainant in the criminal case. For filing of the charge-sheet your presence is not required. The prosecution will file the charge-sheet before the proper court, after which proceedings will commence in court. You will be called as a prosecution witness to record your evidence and will be subject to cross-examination, if any, by the defence counsel. As you will be away for a year, it is better to obtain the court's permission citing the genuine reason.

You have filed cases, why you will require permission from court to visit abroad. You are free to go abroad - no permission require. Your appointed advocate will represent the case.

If your advocate will not appear in divorce and DV case, court will dismiss them for default. Sec 498a will not dismiss.

it is better file an application before the court for permission to visit abroad and then you can travel to abroad.

1. You can travel abroad without permission from court as the cases are filed by you and not against you. 

2. Cases can be dismissed if your advocate doesn't appear in court on every date given by court. 

3. You should try to give your statement before court before leaving to abroad.

4. Give POA to your family member to appear on your behalf in your absence so that case should not be dismissed in default. 

If you do not attn d the court in the case you have filed then the court may even dismiss your case.

You can give a power of attorney deed to someone to represent you in your absence but remember that they cannot depose evidence on your behalf.

In 498a case the court may issue a warrant to you if you do not attend the court for deposing the evidence as prosecution witness.

The court may not entertain any application seeking permission to go to abroad for one year period during the pendency of a case before the court.