What is the expected real power output on the secondary side of a 230/115 kV transformer rated at 100 MVA with 80 MW entering the primary side?

In a transformer, the real power output on the secondary side is primarily determined by the power entering the primary side, assuming ideal conditions without losses. A transformer operates on the principle of conserving energy, meaning that the power input on the primary side should ideally equal the power output on the secondary side, minus any losses due to inefficiencies.

In this scenario, you have a transformer rated for 100 MVA and 80 MW entering the primary side. Since the transformer is designed to handle that volt-ampere (VA) capacity, it can transfer the full amount of power it receives. If 80 MW is entering the primary side, this is the real power that can be transformed and delivered to the secondary side.

Thus, under ideal circumstances, the expected real power output on the secondary side of the transformer will also be 80 MW. It's important to note that transformers are typically rated for reactive power (measured in MVA), but the real power output will be limited by what is actually entered on the primary side, particularly when only considering real power inputs such as 80 MW here.

Therefore, the expected real power output on the secondary side is indeed 80 MW.