Delta Connected Unbalanced Inductive Load Balancing

Yes it is possible (and elementary using three phase loads which are generally balanced by nature).

Consider the case using simple resistances and then expand that to include inductances if you are having problems getting you head around the concepts added by three phase inductive theory.

Somewhat helpful link

Consider a simple unbalanced delta connected inductive load. Balance it with reactance connecting parallel for each branch.

I am doing it with Thyristor controlled reactor which i will do it later, the real problem is i don't know how to get susceptance and hence reactance for balancing.

see the fig.

This link may be of help I imagine (get it, Susceptance - Imaginary)

Susceptance

What are the loads exactly, if you are using Thyristor control they cannot be that large.

Honestly, if it were me (and this were a real-world application) I would just try and balance the single phase loads better to get a more balanced three phase load. Some imbalance is acceptable in most cases, and it is better than adding additional reactors that could interact and cause power quality issues.

What are the loads?

It is possible, though the need for it is abstruse.

see this it may help you

Impedance Matching