A generator is typically connected to the power system through which type of transformer?

A generator is typically connected to the power system through a wye-delta transformer configuration. This setup is advantageous because it allows for the transformation of generator output voltages to higher transmission voltages while also providing a phase shift between the windings, which can help in managing the flow of power and stabilizing the system.

The wye connection on the generator side helps to facilitate neutral grounding, which enhances safety and protects equipment during unbalanced load conditions or faults. The delta connection on the power system side provides better performance with respect to short-circuit currents and is less susceptible to variations in load.

Overall, this configuration effectively balances the system's requirement for voltage regulation, fault tolerance, and efficient power transfer while maintaining the necessary protection and operational flexibility.