Sub-Synchronous Oscillation Phasor Monitoring is a licenced firmware option available on VECTO host devices.
Unique to this algorithm is its ability to detect both phasor amplitude and phase angle up to frequencies very close to the fundamental component.
VECTO host devices concurrently identifies up to three dominant oscillation phasors within the range of 0.1Hz to 43Hz (for 50Hz systems).
The algorithm’s low-frequency range, spanning from 0.1Hz to 1Hz, is designed to identify inter-area oscillations. These oscillations typically arise from the interaction of significant energy sources that are geographically distant. This type of oscillation is commonly observed within the frequency range of 0.2Hz to 0.8Hz.
The algorithm’s mid-frequency range, ranging from 1Hz to 10Hz, is tailored to identify local-area oscillations. These oscillations typically emerge from the interaction among energy sources situated in closer proximity. A common cause is the phenomenon known as “hunting” among a group of generators.
The algorithm’s high-frequency range, spanning from 10Hz to 43Hz, is designed to pinpoint oscillations arising from control loop instability among different Inverter-Based Resources (IBR) energy sources.
