Since kva literally just means ‘kilovoltamps’ and is calculated by multiplying volts * amps, and transformers convert step up and down voltages while keeping amperage roughly the same (to the first order approximation), then yes. Minus losses.
And yes, you could parallel sets of even series transformers together. It will work fine, until something happens and then it doesn’t (or explodes). Making that not happen is relatively non trivial and is a lot of why keeping a working power grid working is non trivial and a lot of work.
At larger scales, when this goes wrong it can cause grid blackouts. Smaller scales, fires.
Since a single transformer rated for the load it will carry is pretty simple and ‘just works’ in almost all scenarios, it’s more economical just using a single one when you can.
No sane way to do that with two different power plants on opposite sides of the state, of course.
And yes, you could parallel sets of even series transformers together. It will work fine, until something happens and then it doesn’t (or explodes). Making that not happen is relatively non trivial and is a lot of why keeping a working power grid working is non trivial and a lot of work.
At larger scales, when this goes wrong it can cause grid blackouts. Smaller scales, fires.
Since a single transformer rated for the load it will carry is pretty simple and ‘just works’ in almost all scenarios, it’s more economical just using a single one when you can.
No sane way to do that with two different power plants on opposite sides of the state, of course.