S-PRO Sub Harmonic Protection Relay


S-PRO 4000 Sub-Harmonic Protection Relay Model 4001

Categories : Relays


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.

The S-PRO relay detects these undamped sub-synchronous oscillations and allows the utility to monitor and protect the power system by isolating the healthy grid from sub-harmonic generation sources.

Features and Benefits
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
Operating speed between 200-450ms
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
Sub-harmonic measurements monitoring through 61850 GOOSE, DNP 3 and Modbus.
Total Sub Harmonic Distortion (TSHD) reporting
59, 27 and 50LS protection at <1.5 cycles,
2nd and 5th Harmonic Blocking for reliable operation under inrush conditions
Flexible CommunicationsState-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 CostSubstation automation cost - includes IEC61850 protocol to display and transfer operational data via local-area network (LAN) for local HMI and wide-area network (WAN) for remote monitoring SCADA
Substation engineering, installation and commissioning cost and times - IEC 61850 GOOSE messages communicate high-speed information between IED’s on the substation LAN (including transfer trips, interlocking, load-shedding, and commands)
Product setting time - 240 x 128 LCD graphical user interface provides convenient means to check/change specific settings and parameters
Improved Overall Response TimeExpedited 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 UseFlexible programmable logic for building customized schemes with ProLogic™ 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
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