Final answer:
Static frequency converter stations are important in applications where power systems with different frequencies need to interconnect, such as international power grids and railways. These stations use power electronics to convert power from one frequency to another without any moving parts, enabling efficient operation across various electrical systems.
Step-by-step explanation:
Converter stations that are of the static frequency converter (SFC) type are used in various applications, including railways, industry, and for power grid interconnections where different power systems operate at different frequencies. These converter stations are essential for converting power from one frequency to another without any moving parts. Instead of using electromechanical devices, SFCs use power electronics, such as thyristors or insulated gate bipolar transistors (IGBTs), to allow the coupling of asynchronous power systems.
For example, an SFC might be used when connecting the power grid of one country operating at 50 Hz to another country's grid operating at 60 Hz. These installations are also found in settings like airports and ports where equipment may need to operate on a frequency different from the local grid. A more specific example of an SFC application is in railway power, where trains may require a specific frequency that differs from the public utility frequency, such as 16.7 Hz or 25 Hz, to match the train's onboard electrical systems. Therefore, SFCs fulfill a crucial role in ensuring the compatibility and efficient operation of various electrical systems across different industries.