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Optically Powered Data Link System (OPDL-16) (PDF, 0.18 MB)
Based on JDSU's patented photonic power technology, the OPDL-16 is an intelligent, modular, stable, low-power and noise-immune data acquisition and power delivery system for sensors, transducers and other remote data communications devices.
One major application is instrumentation for current or voltage sensing in high voltage electric power substations, where accurate and quality metering (e.g. 720 A at 110 kV or above) and protection (surge as high as 18,000 A) are necessary to maintain the integrity of the HV network. The OPDL-16 is divided into a remote unit at high voltage potential and a local unit based in the substation control room or an existing control enclosure.
The OPDL-16 provides a number of key advantages over today's conventional sensing technologies. The use of fiber optic cables isolates the current transducer or sensor from ground potential. Compared with conventional oil or SF-6 gasfilled HV magnetic current transformers, the fiber-based data link remains in operation during a blackout, as the power is delivered by fiber from the local unit.
The OPDL-16 incorporates a light-weight "dry"signal column, immune from electromagnetic interference, and yields higher data accuracy. The OPDL-16 is more reliable, environmentally safer, lighter weight and offers significant savings in cost and space.
Optical power is precisely controlled and delivered by a laser module, and is then converted into electrical power by a power converter for signal processing at the remote or high voltage end. Additional power is also readily available for the remote analog sensor (e.g. integrator).
Output is available in digital or analog forms (e.g. 16-bit parallel, ±10 V, 4 to 20 mA). Feedback and self-check features supervise all vital functions of the laser output level, data link integrity, recovery and synchronization.
Key Features
Applications
