S-PRO Sub-Harmonic Protection Relay
The S-PRO sub-harmonic protection relay protects various power system equipment including generators, wind turbines, PV system, series compensated transmission lines, FACTS devices and power transformers from uncontrollable sub-synchronous oscillation conditions known as: sub-synchronous torsional interaction (SSTI) sub-synchronous control interaction (SSCI) sub-harmonic resonance (SSR) sub-harmonic ferroresonance
These sub-synchronous oscillation conditions introduce opportunities for an exchange of energy at a given sub-synchronous frequency of the system. This exchange of energy results in stress on the power system elements involved that can lead to severe damage.
Fitur & Keunggulan
- sub-synchronous torsional interaction (SSTI)
- sub-synchronous control interaction (SSCI)
- Provides real time processing of voltage and current signals at all Sub-harmonic frequencies in the range of 5 - 55 Hz (60 Hz system) and 5-45 Hz (50 Hz system) with a detection resolution of 0.2 Hz
- Provides incident trending to protect generators and other equipment against sustained sub-harmonics beyond normal levels that may not exceed levels that will cause SSR
- Operations per duration settable for durations from 1-60 minutes
- Events accumulated over a long period of time can be used to flag maintenance requirements
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