What is the primary function of an exciter on a traditional generator?

The primary function of an exciter on a traditional generator is to regulate voltage through excitation current. The exciter provides the necessary field current to the generator's rotor, which in turn generates the magnetic field required for electricity production. By adjusting the amount of excitation current supplied to the rotor, the exciter helps maintain the output voltage of the generator at the desired level, ensuring stability in the electrical system. This voltage regulation is crucial because it impacts the overall performance and reliability of the power generation process. Effective voltage control is essential for matching the supply of electricity with the demand, thus playing a vital role in the operation of the electrical grid.

In contrast, other functions such as regulating frequency, controlling mechanical loads, or measuring output power are achieved through different systems and components within the power generation and distribution network. These functions do not pertain directly to the primary purpose of the exciter.