Model S-PRO 4000 - Sub-Harmonic Protection Relay
The S-PRO sub-harmonic protection relay protects generators, wind turbines, and SVC equipment from uncontrollable sub-harmonics which cause
- Built on a contemporary new substation hardened hardware platform and powered by a state-of-the-art processor
- Protects the grid from sub harmonic oscillations at the point-of-common-coupling every 1 second, with additional user-configurable delays
- Provides real time processing of voltage and current signals, comprehensive sub-harmonic protection, with sub-harmonic monitoring for each frequency in the range from 5 Hz to 40 Hz
- Flexible Communications
- State-of-the-art communications (2 rear ports, 100BASE-TX RJ-45 or 100BASE-FX 1300 nm multimode optical with ST style connector to accommodate the industry’s latest network-based communications)
- Ethernet ports with 2 unique MAC addresses that easily accommodate network access security needs
- Front panel USB and 100BASE-TX RJ-45 Ethernet port interfaces (readily accommodate modern standard laptops)
- Reduced Cost
- Product setting time – 240 x 128 LCD graphical user interface provides convenient means to check/change specific settings and parameters
- Improved Overall Response Time
- Expedited response to systems events (11 generic front panel LEDs can be mapped to internal elements) allowing operators to quickly identify the cause of system events
Easy to Use
- Flexible programmable logic for building customized schemes with ProLogic™ statements – 24 control logic statements (total of 192 statements)
- User-friendly, Windows-based relay setting and record analysis software
- Enhanced DNP3.0 Level 2 SCADA communication protocol including user-selectable point lists, class support and multiple master station support
- Exceptional fault recording capabilities with 96 s/cycle, all channels with events (best combination of waveform accuracy and file size)
- Sub-Synchronous Torsional Interaction (SSTI)
- Sub-Synchronous Control Interaction (SSCI) and
- Ferro-resonance
The S-PRO monitors potentially harmful Sub-Synchronous Oscillation (SSO) in real time & detects Sub-Synchronous Resonance (SSR) in transmission lines with power controller interactions such as FACTS or HVDC lines, particularly those lines with series compensation and interconnected with wind farms .
Protect against sustained sub-harmonics in wind farm operations
Un-damped sub-harmonic current oscillations created by series capacitors interacting with the wind system can cause serious damage to wind turbine controllers and also to conventional generators. The wind turbine`s own mechanical system interactions (tower-to-blade) can also generate sub-harmonics, which are detrimental to induction generators and transformers, and may cause resonance at the point of common coupling in the electrical grid.
The S-PRO relay detects these sub harmonic oscillations and allows the utility to monitor and protect the power system by isolating the healthy grid from sub-harmonic generation sources.