Hi there Brite Spark,
Welcome to ECN, mate.
A standard electronic transformer draws about 250mA from a 230V supply.
And to my reckoning, that's 57.5W a piece.
Now, divide 2300W by that and you get something like 40 transformers.
However, lets be realistic about this, no-one should load a circuit up to that extent.
You still need a certain safety margin.
Generally I wouldn't put any more than 20 on the one circuit.
There was at one time here in NZ, a maximum number of luminaires allowed on the one circuit, but I guess that's all gone now and I don't see that AS/NZS 3000 makes any mention of lighting apart from in a Maximum Demand scenario.
AS/NZS 3018(Domestic Electrical Installations) may have different ideas about that though.
Hope that this helps.