OCT Optical Current Transformer serves as the backbone for next-gen grid
intelligence systems—where speed, precision, and interoperability define
operational excellence.
The primary function of OCT is to measures high voltage or high current in power systems using optical
sensing principle such as the Faraday effect whereby polarized light rotates in
proportion to the magnetic field around a conductor—to accurately measure
electric current.
Compared to traditional electromagnetic current transformers,
OCTs offer superior bandwidth, compact form factor, and enhanced safety due to
their electrical isolation capabilities.
Utilities rate the application of OCT in the power grid as highly advantageous for modern digital
substations, especially in HVDC and UHVDC projects.
The key advantages are :
- OCTs support real-time monitoring of power flow
- No Magnetic Saturation: OCT do not saturate
during heavy fault or short-circuit conditions, ensuring highly accurate
current and voltage measurements even during severe grid transients.
- Digital interface readiness and immunity to
electromagnetic interference (EMI)
- OCT is provided with seamless interface with IEC 61850-compliant digital substations,
providing direct sampled values for merging units and protection relays.
- Cybersecurity guaranteed : optical sensors offer passive,
non-electrically conductive monitoring, enhancing grid resilience without
introducing vulnerabilities.
- OCT operates with better wideband performance, offering superior
frequency response compared to traditional devices.
- OCT has been already commissioned all over the world, facing aging in weather such as arctic or desert, as well as damp coastal zones and very dry environment.
- Optical designs significantly reduce equipment footprint and weight, which
lowers structural and installation costs in extra-high-voltage (EHV) and
ultra-high-voltage (UHV) switchyards.
- TSOs, DSOs, EPCs will find OCT beneficial for any UHVDC and HVDC application in converter stations.
- OCT can be used also in the AC yard of converter station
- OCT enjoys references for over two decades of commissioning and installation by Utilities and EPCs
){kind=logo}
)
)
)
)