In a power system, the main function of synchronous condensers is to provide what type of power?

Synchronous condensers primarily provide reactive power to the power system. Reactive power is essential for maintaining voltage levels within the system and supporting the transfer of active power. Synchronous condensers can adjust their reactive power output dynamically by changing the field excitation of the synchronous machine. When more reactive power is needed, the excitation can be increased, creating a capacitive effect, while reducing excitation can absorb reactive power, acting more inductively.

This capability of synchronous condensers helps to stabilize the grid, especially during conditions where there are fluctuations in load or generation. Therefore, their role in supplying reactive power is critical for enhancing system reliability and improving voltage control across the transmission system.