Synchronized phasors (synchrophasors) provide a real-time measurement of electrical quantities from across the power system. Applications include wide-area control, system model validation, determining stability margins, maximizing stable system loading, islanding detection, system-wide disturbance recording, and visualization of dynamic system response. The basic system building blocks are GPS satellite-synchronized clocks, phasor measurement units (PMUs), a phasor data concentrator (PDC), communications equipment, and visualization software.
Why Choose SEL?
- SEL has a comprehensive portfolio of products to create a complete solution that meets your needs.
- SEL has experience implementing systems worldwide and guarantees products with a ten-year warranty.
- SEL relays and meters include PMU capability free of charge. This makes SEL systems economical and easy to implement.
- The SEL Engineering Services team can design, install, and commission your system to meet your schedule and budget.
See Live Synchrophasors and Try the Software on Demand
SEL is streaming synchrophasor measurements from wall outlets across the United States to a demo version of Synchrowave Operations. With your mySEL account, you can easily log in to this demo software to visualize live data and try out key features of Synchrowave Operations.
System Components
Synchrophasors are currently being used by utilities around the world for system model validation, situational awareness, stability analysis, islanding detection, disturbance analysis, and wide-area measurement and control. SEL offers a wide variety of solutions to fit your application. Whether you are working with individual units or a complete system, SEL can help you design, install, and commission your system.
PMUs
| Format | Synchrophasor Data Elements | |||||||
|---|---|---|---|---|---|---|---|---|
| PMU | Compliance Standard | Compliance Level1 | SEL Fast Message | Message Rate | CT Inputs | PT Inputs | Analogs | Digitals |
| SEL‑735 Power Quality and Revenue Meter | IEEE C37.118-2011, -2014a IEEE/IEC 60255-118-1-2018 | P class | 1–60 mps | 3 | 3 | 4 | 16 | |
| SEL‑2240 Axion— Modular PMU | IEEE C37.118-2011, -2014a | P and M class | 1–60 mps | 64# | 64# | 64# | 30 | |
| SEL‑400G Advanced Generator Protection System | IEEE C37.118-2011, -2014a IEEE/IEC 60255-118-1-2018 | P Class | 1–60 mps | 18 | 6 | 16 | 64 | |
| SEL‑411L Advanced Line Differential Protection, Automation, and Control System | IEEE C37.118-2005 (pre-R129) IEEE C37.118-2011, -2014a (R129 and later) IEEE/IEC 60255-118-1-2018 (R129 and later) | 1 P and M class | 1–60 mps | 6 | 6 | 16 | 64 | |
| SEL‑311C, SEL‑351, SEL‑351A, and SEL‑351S Protection Systems | IEEE C37.118-2005 | 1 | 1–60 mps | 3 | 3 | 0 | 16 | |
| SEL‑351RS Kestrel Single-Phase Recloser Control | IEEE C37.118-2005 | 1 |
| 1–60 mps | 1 | 1 | 0 | 16 |
| SEL‑487V, SEL‑421, and SEL‑451 Protection, Automation, and Control Systems | IEEE C37.118-2005 | 1 | 1–60 mps | 6 | 6 | 16 | 64 | |
| SEL‑487E Transformer Protection Relay | IEEE C37.118-2005 | 1 | 1–60 mps | 18 | 6 | 16 | 64 | |
| SEL‑2431 Voltage Regulator Control | IEEE C37.118-2005 | 1 | 1–60 mps | 1 | 2 | 0 | 8 | |
| SEL‑651R‑2 Recloser Control | IEEE C37.118-2005 | 1 | 1–60 mps | 3 | 6 | 0 | 64 | |
| SEL‑751 Feeder Protection Relay | IEEE C37.118-2005 | 1 | 1–60 mps | 3 | 3 | 4 | 16 | |
| SEL‑751A Feeder Protection Relay | IEEE C37.118-2005 | 02 | 1–10 mps | 3 | 3 | 4 | 16 | |
| SEL‑700G Generator Protection Relay | IEEE C37.118-2005 | 1 | 1–60 mps | 6 | 6 | 4 | 16 | |
| SEL‑787 Transformer Protection Relay | IEEE C37.118-2005 | 02 | 1–10 mps | 6 | 3 | 4 | 16 | |
| SEL‑787‑3E/‑3S/‑4X Transformer Protection Relay* | IEEE C37.118-2005 | 1 | 1–60 mps | 12 | 4 | 4 | 16 | |
| SEL-787L Line Current Differential Relay | IEEE C37.118-2005 | 1 | 1–60 mps | 4 | 4 | 4 | 16 | |
| SEL‑311A, SEL‑311B, SEL‑311L, and Legacy SEL‑351 Relays | 1 mpm–1 mps | 3 | 3 | |||||
| SEL‑734 Revenue Meter | 02 | 1–20 mps | 3 | 3 | ||||
1 IEEE C37.118-2011 defines performance classes P and M. IEEE C37.118-2005 defines performance classes 0 and 1.
2 1% Total Vector Error (TVE) is guaranteed for the Level 1 frequency range criteria and Level 0 voltage magnitude and harmonic distortion criteria.
# A maximum of 64 CT, PT, or analog inputs allowed.
* 12 CT inputs and the 4 PT inputs are maximum for each, and a unit cannot be configured with both of these maximums.