Static synchronous series compensator

This injected voltage could be considered as an inductive or capacitive reactance, which is connected in series with the transmission line.

[2] In addition, SSSC is able to reverse the power flow by injecting a sufficiently large series reactive compensating voltage.

[2] The SSSC consists of a voltage source converter (VSC) connected in series with the transmission line through a transformer.

By controlling the magnitude and phase angle of this injected voltage, the SSSC can effectively modify the line's impedance.

The SSSC can quickly respond to these disturbances by injecting appropriate voltages, thereby stabilizing the system and preventing cascading failures.