Network Study

Hello Sir's.

Sir we are carrying out the load analysis for a network and I'm slightly confused how to proceed, please if someone can guide me, i will b very grateful to him, also any suggestion is warmly welcomed.

So, the network is feed from 30/40 MVA transformer, but its been limited to 30 MVA as per the demand of the client, but now the client wants to increase the load 40 MVA, which has been confirmed by the Power provider. the network consists of approx 110 transformers combining the total MVA of about 110 MVA, but system and the loading of the transformers has been designed like this it can only take 30MVA ( on average the transformer has been designed to carry out the 30% of their full capacities), but the max demand ever recorded is 22 MVA, so now the client wants to add another 17MVA load, I have carried out the load analysis and with minnor changes ( like changing of Ct's and relay settings) the study shows that load can be loaded.

but I'm finding it very hard to justify that the load can be loaded, and i m confused either to go with the design or the MAX LOAD ( as i told the max load ever recorded is 22 MVA , but any time in future it can be loaded up to 30MVA as well). So if some please guide me how to proceed, and what methodology should i adop, what necessary precautions i should consider, Please provide me with your kind suggestions .

Thank you